New uranium targets identified at Nabarlek Project, NT
www.devex res ources.com.au T: +61 (0) 8 9322 3990 F: +61 (0) 8 9322 5800 E: firstname.lastname@example.org DevEx Resources Limited Level 2, 1292 Hay Street, West Perth WA 6005, Australia GPO Box 2890, Perth WA 6001 29th September 2021 DevEx ramps-up exploration at Nabarlek Uranium Project, NT after identifying new high-grade targets Extensive 12-month exploration campaign underway across one of the world’s most highly-endowed uranium provinces to test a deep pipeline of targets HIGHLIGHTS • Multiple new uranium, copper and gold exploration targets identified as part of a recently completed technical review, highlighting an outstanding exploration opportunity at the Company’s Nabarlek Uranium Project. • DevEx’s extensive tenement package, situated in the heart of Australia’s world-class Alligator Rivers Uranium Province, is centred on and includes the former Nabarlek Uranium Mine , considered Australia's highest-grade uranium mine with past production of 24Mlbs @ 1.84% U 3 O 8 . • The exploration opportunity includes new near-mine targets at Nabarlek and several prospects (including Nabarlek South and the Zeus-to-U40 corridor), where both strike and down-plunge extensions to high-grade uranium, copper and gold mineralisation have been identified. • A substantial exploration program is planned over the coming 12 months, with drilling to be undertaken over multiple prospects. • DevEx will host an investor webinar on Thursday, 30th September 2021 at 9.00am WST/11.00am AEST to provide further technical detail and explain the significance of the uranium targets , developed from its technical review. Interested shareholders and investors can join the webinar by clicking on the link below: https://www.bigmarker.com/read-corporate/DevEx-Resources-Investor-Update-Uranium- Exploration-Strategy DevEx Resources (ASX: DEV ; DevEx or the Company ) is pleased to announce details of a new multi-pronged exploration program which has commenced across its highly prospective Nabarlek Uranium Project , located in the heart of the world-class Alligator Rivers Uranium Province (ARUP) in the Northern Territory (Figure 1). The Alligator Rivers Uranium Province (ARUP) is considered amongst the world’s most prospective for uranium mineralisation, with over 500 million pounds of uranium (U 3 O 8 ) identified in mined and unmined deposits 1,2,3 . Page | 2 DevEx has recently undertaken a comprehensive technical review of the historical pre- and post- mine exploration data covering the Nabarlek Project area, identifying a number of outstanding exploration opportunities for uranium, copper and gold mineralisation. Figure 1: Nabarlek Project – Regional geology of the Alligator River Uranium Province (ARUP) showing DevEx’s current tenement holdings, located well outside of the National Park. Page | 3 Figure 2 : Nabarlek Project – Uranium Prospects including the historic Nabarlek Uranium Mine. Uranium-copper-gold mineralisation has been intersected within basement rocks (incl Cahill Formation and the Oenpelli Dolerite) along both the Nabarlek Fault Zone (NW) and the North and Gabo Faults (NE) with the overlying Kombolgie Sandstone acting as a masking cap rock to mineralisation. The new exploration campaign will systematically test an extensive suite of exciting targets identified as part of a project-wide technical review that commenced earlier this year in response to the rapidly improving outlook for the global uranium sector. The new targets surround the historic high-grade Nabarlek Uranium Mine (past production: 24Mlbs @ 1.8% U 3 O 8 1 ) within the Company’s granted Nabarlek Mining Lease and surrounding exploration tenements (Figure 2). The targets range from areas located immediately adjacent to the historic Nabarlek Uranium Mine, to drill targets located either down-plunge or along strike from previous high-grade drill intercepts, including: Nabarlek South prospect – drilling is planned to test the down-plunge potential beneath a cluster of high-grade uranium intercepts including: • NARD6017 25m @ 0.32% U 3 O 8 from 115m Incl. 2.0m @ 1.0% U 3 O 8 and 3.0m @ 1.0% U 3 O 8 Page | 4 Zeus to U40 corridor – early-stage exploration, including drilling is planned to test a uranium-copper-gold corridor from the Zeus to U40 Prospects, where previous drilling encountered high-grade uranium, copper and gold mineralisation, including: 6m @ 7.6% U 3 O 8 , 0.7g/t Au, 2.0% Cu from 75m (NAD7492) Other similar uranium corridors on the Nabarlek, Gabo and North Faults, all of which appear to control the distribution of uranium mineralisation, as seen at the Overload , Coopers , North Buffalo , Black Bream and KP Prospects. All of these areas require a similar amount of exploration attention in the coming 12 months. DevEx Managing Director Brendan Bradley said: “Some months ago we commissioned a project- wide technical review to re-evaluate the potential of Nabarlek and the surrounding tenure. This has led us to revisit one of the Company’s foundation assets, which comprises a dominant footprint in the heart of one of the world’s most endowed uranium provinces. “We have been fortunate to inherit a treasure trove of data surrounding this significant historical uranium mine site. Our compilation and subsequent review demonstrates a wide range of exploration targets supported by numerous occurrences of uranium mineralisation throughout the Project. Nabarlek is not a one-prospect Project, it is an extensive piece of uranium-copper-gold real estate within a Tier-1 uranium province. “We look forward to getting back on this exciting ground for a new round of exploration.” NEXT STEPS DevEx has defined multiple high-grade uranium and copper-gold targets requiring follow up in the coming 12 months, ranging from a) Drill-ready targets designed to extend existing high-grade uranium intercepts (eg. Nabarlek South); to b) Under-explored uranium (copper and gold) bearing corridors, including: i. Zeus to U40 Corridor; ii. North Fault – Nabarlek Uranium Mine to North Buffalo iii. Gabo Fault - Overload to Coopers Prospects c) Early-stage surface geochemical anomalies such as the KP and the Zeus Prospects. Field mapping has commenced at Nabarlek, with drilling planned to test these prospects in the coming dry season next year. Reconnaissance activities are likely to continue during the wet season, taking advantage of the all-weather bitumen airstrip adjoining the Nabarlek Exploration Camp. Activities will be used to advance exploration targets ahead of drilling planned for the next “top end” dry season. Page | 5 Priority Exploration Prospects – Technical Review The 100%-owned Nabarlek Project comprises an extensive package of mining and exploration tenements located within the Alligator Rivers Uranium Province, Northern Territory. The Alligator Rivers Uranium Province (ARUP) is considered amongst the world’s most prospective for uranium mineralisation, with over 500 million pounds of uranium (U 3 O 8 ) identified in mined and unmined deposits 1,2,3 . In addition to these large uranium deposits, copper-gold-PGE mineralisation is also well documented in the pre-1990’s literature in the ARUP 4,5,6 as exemplified at the Coronation Hill Deposit (gold-uranium-platinum group elements (PGE) 6,8 . Significant occurrences of gold mineralisation have been reported from many uranium deposits, including Jabiluka, Ranger and Koongara. Although rarely assayed, DevEx considers the potential to discover significant occurrences of associated uranium, gold, copper and PGE mineralisation within the Nabarlek Project to be excellent. Examples of this potential can be seen along the Zeus-to-U40 corridor, where significant levels of copper, uranium and gold mineralisation have been encountered in historic drilling. DevEx has recently undertaken a comprehensive technical review of historical hard copy and digital pre- and post- mine exploration data covering the project area, resulting in the identification of several outstanding exploration opportunities for uranium, copper and gold mineralisation. Nabarlek South Prospect Located 1km south-east of the Nabarlek Uranium Mine, the Nabarlek South Prospect lies at the intersection between two uranium-bearing faults zones – the west-dipping Nabarlek Fault, which hosts the uranium mineralisation at the Nabarlek Mine, and the north-dipping Gabo Fault (Figure 1). Previous drilling since the 1980’s identified broad zones of uranium mineralisation at the intersection of these two faults, with uranium extending along the Gabo fault towards several other prospects to the east and west. DevEx’s review identified a high-grade, north-plunging uranium shoot close the intersection between the Nabarlek and Gabo faults (Figure 3), with high-grade intercepts including: • NARD6017 - 25m @ 0.32% U 3 O 8 from 115m Incl 2.0m @ 1.0% U 3 O 8 and 3.0m @ 1.0% U 3 O 8 • NANND0034 - 8m @ 0.47% U 3 O 8 from 88m Incl 2.0m @ 1.3% U 3 O 8 Uranium mineralisation is typically hosted within the Oenpelli Dolerite and is interpreted to be plunging parallel with the intersection lineation of the two uriniferous faults and these high-grade intercepts remain open at depth. Page | 6 DevEx is planning to test this high-grade uranium shoot with diamond drilling. Holes are currently being planned and the Company has lodged its drilling application with the NT Resources Regulator. Figure 3 : Nabarlek South – Three-dimensional view looking south-west at the intersection between the uranium-bearing Nabarlek Fault (host to the Nabarlek Uranium Mine) and the Gabo Fault. A high-grade uranium shoot is recognised to plunge to the north-east and remains open at depth. Nabarlek Uranium Mine – North Fault Target A series of drill targets are apparent on the north-eastern Nabarlek pit edge, extending eastward along the interpreted position of the North Fault through to the North Buffalo prospect. DevEx is exploring for extensions to the uranium mineralisation at Nabarlek following recognition that the high-grade northern shoot is either sharply offset or controlled by the north-east trending North Fault (Figure 1 and 4), similar to the Gabo Fault to the south. A pre-mining (1972) ground radiometric survey clearly maps the mined portion of the uranium mineralisation at Nabarlek, including a north-east trending tail along the interpreted position of the North Fault. Drilling at Nabarlek has drilled parallel to the North Fault and is unlikely to have tested for uranium mineralisation along this north-eastern structure. Page | 7 Figure 4 – Pre-mine (1972) ground radiometric survey clearly maps surface uranium mineralisation within the Nabarlek pit (mined 1980) with the majority of diamond/RC drilling angled to the south-west. A sharp north-east fault (North Fault) controls the northern extent of the uranium and a radiometric tail maps this fault east of the pit. Drilling is unlikely to have tested for north- east orientated uranium mineralisation along this fault. The North Fault represents a potential target for extensions to the Nabarlek uranium mineralisation. Considering that the exploration target lies adjacent to the edge of the historical pit, DevEx regards the North Fault as a compelling exploration target for drilling between the Nabarlek Uranium Mine and the North Buffalo Prospect (Figures 1 and 4). Prospective Uranium Corridors supported by Radon Track Etch Sampling To the north-east of the Nabarlek Uranium Mine, several strong “Radon Track Etch” anomalies were identified in historical surface sampling by Queensland Mines between 1989 to 1990. These anomalies potentially point to buried uranium mineralisation that may lie within or adjacent several prospective uranium-bearing structural corridors. Radon is a unique element that forms as a gas in the radioactive decay chain of uranium. Concealed uranium deposits produce radon gas, which migrates to the surface via fractures and can therefore be detected using the Radon Track Etch sampling technique. This system has been used extensively in the Alligator River Province with some success in delineating masked uranium deposits 7 . Page | 8 Figure 5 – A detailed 1989-190 Radon Track Etch survey identified priority anomalies east of Nabarlek Uranium Mine. Drilling of three of the four anomalies have identified significant uranium at U40 and U42, with significant copper seen at Zeus Prospects (see Figure 6). The KP Prospect has not be followed up and is considered a high priority target as it lies between the Gabo and North Fault and capped by the Kombolgie Sandstone. At Nabarlek, an impressive 25,000 Radon Track Etch samples were collected over two years between 1989 and 1990 on a 100mN x 200mE grid. On the eastern side of the project area, the Radon Track Etch survey identified a cluster of priority radon anomalies orientated along several north-west structural corridors – parallel to the Nabarlek fault system (see Figure 5). Three of these anomalies (U40, U42 and Zeus) have been partially drilled by RC/diamond drilling with bedrock uranium mineralisation identified at the U40 and U42 Prospects and significant copper identified at the Zeus Prospect. Uranium-Copper-Gold Corridor: Zeus to U40 Prospects In 2010, drilling beneath a Radon Track Etch anomaly at the U40 Prospect intersected high-grade uranium-copper-gold-platinum group elements (PGE) mineralisation (see Table 1), including: • NAD7492 6m @ 7.6% U 3 O 8 , 0.7g/t Au, 2.0% Cu from 75m • NAD7493 12.3m @ 0.7% U 3 O 8 , 1.8g/t Au, 2.0% Cu from 80.4 Incl. 4.8m @ 1.9% U 3 O 8 , 4.5g/t Au, 3.2% Cu Page | 9 Importantly, the mineralisation style at U40 bears close similarities to the high-grade Coronation Hill gold-uranium-PGE deposit south of Nabarlek (Figure 1). At the Zeus Prospect , a small programme of RC and diamond drilling targeting the Radon Track Etch Anomaly intersected broad open-ended copper sulphide mineralisation, including 18m @ 0.2% Cu from 38m (see Figures 5 and 6 and Table 1). The mineralisation appears to be flat-lying, dipping shallowly to the north, and is open in all directions. No induced polarisation (IP) geophysics or further drilling followed up on these results. Drilling has not explained the Radon Track Etch Anomaly. The open-ended copper mineralisation and the potential for better grade mineralisation to occur along strike provides a significant exploration opportunity. The close association of copper mineralisation with high-grade gold and uranium mineralisation at U40 increases the priority of the target at Zeus Prospect and several other Radon Track Etch anomalies along the corridor. The Company is planning ground IP and subsequent RC along the corridor over the coming 12 months. Figure 6 – Historical 1980’s Reverse Circulation drilling at the Zeus Prospect. Drilling has defined flat-lying copper mineralisation which remains open in all directions (see Figure 5). Historical RAB holes (NAB series) are also shown which were ineffective in defining the copper mineralisation. Page | 10 KP Prospect At the newly named KP Prospect (Figure 5), a strong Radon Track Etch Anomaly has been recognised in the regional dataset north-east of Nabarlek Uranium Mine. Like the Nabarlek deposit, the anomaly is oriented north-west and lies between the projections of the Gabo and North Faults. Anomalous Radon Track Etch data defining this anomaly lies within the top 1 percentile of all data collected in the region. Any surface expression of uranium mineralisation would likely be masked by the overlying Kombolgie Sandstone, which is typically regarded as a caprock to uranium mineralisation. Given the scale of the anomaly, DevEx has commenced ground mapping and trial surface sampling. Follow-up RC/Diamond drilling to test the anomaly beneath the Kombolgie sandstone is planned over the coming 12 months. This announcement has been authorised for release by the Board. Brendan Bradley Managing Director For further information, please contact: Brendan Bradley, Managing Director DevEx Resources Limited Telephone +61 8 6186 9490 Email: email@example.com For investor relations inquiries, please contact: Nicholas Read Read Corporate Telephone: +61 8 9388 1474 Email: firstname.lastname@example.org Page | 11 REFERENCES 1. McKay, A.D. & Miezitis, Y. , 2001. Australia’s uranium resources, geology and development of deposits. AGSO-Geoscience Australia, Mineral Resources Report 1. 2. ERA Annual Production Reports 2001 to 2018. 3. Energy Resources of Australia Ltd (ASX:ERA) Annual Statement of Reserves and Resources January 2018. 4. Hancock M C, Maas R, Wilde A R 1990 - Jabiluka Uranium-Gold deposits: in Hughes F E (Ed.), 1990 Geology of the Mineral Deposits of Australia & Papua New Guinea The AusIMM, Melbourne Mono 14, v1 pp 785-793 5. Snelling A 1990 - Koongarra Uranium deposits: in Hughes F E (Ed.), 1990 Geology of the Mineral Deposits of Australia & Papua New Guinea The AusIMM, Melbourne Mono 14, v1 pp 807-812 6. Carville D P, Leckie J F, Moorhead C F, Rayner J G, Durbin A A 1990 - Coronation Hill Gold-Platinum- Palladium deposit: in Hughes F E (Ed.), 1990 Geology of the Mineral Deposits of Australia & Papua New Guinea The AusIMM, Melbourne Mono 14, v1 pp 759-762 7. Pedersen, C.P., Dunbier, J., & Gingrich, J.E. (1980). Experience with the track etch method for uranium exploration in Northern Australia. International Atomic Energy Agency (IAEA): IAEA.) 8. Orth K, Meffre S, Davidson G (2014) Age and paragensis of mineralisation at Coronation Hill uranium deposit, Northern Territory in Miner Deposita. COMPETENT PERSON STATEMENT The information in this report that relates to Exploration Results is based on information compiled by DevEx Resources Limited and reviewed by Mr Brendan Bradley who is the Managing Director of the Company and a member of the Australian Institute of Geoscientists. Mr Bradley has sufficient experience that is relevant to the styles of mineralisation, the types of deposits under consideration and to the activities undertaken to qualify as a Competent person as defined in the 2012 edition of the “Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves”. Mr Bradley consents to the inclusion in this report of the matters based on this information in the form and context in which it appears. The information in this report which relates to Drill Results for the U40 Prospect are extracted from the ASX announcements entitled “UEQ Identifies High Grade Copper-Gold and Base Metal Potential at NT Uranium Projects ” released on the 4th October 2017 and “Higher Uranium Grades Returned from U40 Prospect – Nabarlek” released on the 16th December 2010 which are available on www.devexresources.com.au. The Company confirms that it is not aware of any new information or data that materially affects the information included in the original market announcements and that all material assumptions and technical parameters underpinning the estimates in the relevant market announcement continue to apply and have not materially changed. The company confirms that the form and context in which the Competent Person’s findings are presented have not been materially modified from the original market announcement. FORWARD LOOKING STATEMENT This announcement contains forward-looking statements which involve a number of risks and uncertainties. These forward looking statements are expressed in good faith and believed to have a reasonable basis. These statements reflect current expectations, intentions or strategies regarding the future and assumptions based on currently available information. Should one or more of the risks or uncertainties materialise, or should underlying assumptions prove incorrect, actual results may vary from the expectations, intentions and strategies described in this announcement. No obligation is assumed to update forward looking statements if these beliefs, opinions and estimates should change or to reflect other future developments. Page | 12 Table 1 – Significant Intercepts Nabarlek Project by Prospect Prospect Hole East (m) North (m) RL (m) Depth (m) Az Dip From (m) Interval (m) U 3 O 8 (ppm) Au (ppm) Cu (ppm) Bl ack Bream NMD0002 329290 8630682 145 492 99 - 80 248 .3 0.2 28183 0.02 0 26 6.5 0.1 8714 0.00 90 272 1.2 593 0.01 2 Boomerang NMLR106 317383 8640991 84 100 221 - 60 55 1.0 2806 85 NMLR153 317425 8640892 82 118 221 - 60 48 1.0 2559 1160 N MLR162 317291 8640829 1082 154 0 - 90 97 2.0 1041 10 116 1.0 873 330 122 4.0 1897 414 NMLR173 317256 8640935 1082 244 0 - 90 106 2.0 1023 3 114 2.0 864 0.01 3 192 1.0 643 3 Bullroarer NMLA320 318976 8641450 66 18 0 - 90 12 1.0 1580 2150 Charlies NASAR0189 316000 8632264 156 65 0 - 90 41 1.0 660 0.01 19 Coopers NAA6406 320337 8638010 67 11 0 - 90 10 1.0 1203 0.00 36 NAA7121 320072 8638042 67 47 0 - 90 27 1.0 772 0.11 1 NAA7130 320021 8637995 67 49 0 - 90 3 6 1 .0 1993 0.24 2 NAD7496 319976 8637909 69 114 140 - 60 4 0.5 20.0 2243 0.45 1 incl. 7m @ 1.2g/t Au and 0.3% U 3 O 8 1 NAR7370 320026 8637954 67 154 140 - 60 29 6.0 963 0.02 2 NAR7371 319987 8637995 68 178 140 - 60 35 8.0 855 0.01 2 NAR737 4 3 20036 8638041 67 154 140 - 60 23 6.0 3282 0.06 3 NAR7377 320077 8638082 68 154 140 - 60 30 1.0 1110 0.01 2 NAR7378 320046 8638115 67 154 140 - 60 35 1.0 708 0.01 3 NAR7386 319980 8637901 69 142 140 - 60 40 23.0 1980 0.25 2 Franks NANND0007 319180 863 658 8 78 232 263 - 80 203 .2 0.1 1106 0.00 43 GC11 NAR7535 316770 8637020 77 250 150 - 60 169 9.0 682 15 NAR7537 316820 8636900 75 210 360 - 70 130 7.0 811 96 148 7.0 458 0 Page | 13 Prospect Hole East (m) North (m) RL (m) Depth (m) Az Dip From (m) Interval (m) U 3 O 8 (ppm) Au (ppm) Cu (ppm) Mikes NARD6011 315070 8634713 81 244 348 - 80 20 0.5 0.5 1285 0.18 25 Nab arlek South NAD6022 318401 8637631 68 168 150 - 60 39 0.7 1101 0.02 12 NANND0029 318359 8637579 69 142 225 - 60 76 24.2 2068 28 1 09.5 22.3 2126 8 i ncl. 3.1m @ 0.6% U3O8 from 125.7m NANND0034 318377 8637597 69 116 225 - 61 78 2.0 6 25 15 88 8.0 4 673 1 incl. 2 . 0m @ 1. 3 % U 3 O 8 2 from 92m NANND0073 318490 8637553 71 181 0 - 90 40 2.0 637 30 NANND0125 318599 8637660 70 157 0 - 90 114 .1 4.9 679 1 127 2.0 825 1 NANND0133 318463 8637668 68 290 0 - 9 0 26 8.7 1.0 3007 30 NANND0148 318416 8637655 68 297 0 - 90 15 3.7 0.8 778 370 NANND0149 318508 8637689 70 301 0 - 90 25 6.9 1.9 629 78 NANNR0032 318325 8637535 69 90 225 - 60 58 4.0 1103 11 74 4.0 796 3 NANNR0065 318301 8637533 69 102 180 - 60 52 6.0 531 21 NANNR0075 318312 8637538 69 48 335 - 60 34 6.0 423 26 NANNR0076 318322 8637514 69 132 335 - 60 41 9.0 610 14 56 1.0 507 22 74 7.0 956 50 90 22.0 650 4 NANNR0080 318257 8637487 69 96 335 - 60 50 1.0 743 22 NANNR0082 318350 8637525 70 72 335 - 60 39 1.0 2653 4 NANNR0083 318295 8637502 70 138 335 - 75 32 1.0 507 16 83 1.0 755 2 NANNR0087 318634 8637657 69 138 0 - 90 104 15.0 2278 2 124 1.0 755 1 NANNR0088 318 645 8637630 70 99 0 - 90 82 2.0 590 7 Page | 14 Prospect Hole East (m) North (m) RL (m) Depth (m) Az Dip From (m) Interval (m) U 3 O 8 (ppm) Au (ppm) Cu (ppm) NANNR0090 318552 8637587 71 84 0 - 90 28 9.0 704 1 NANNR0092 318289 8637549 68 132 0 - 90 70 2.0 873 1 85 12.0 1216 2 107 1.0 778 8 116 8.0 1716 4 NANNR0093 318361 8637530 70 9 6 0 - 90 61 2.0 554 8 71 1.0 967 6 NANNR0116 318588 8637635 70 121 0 - 90 50 2.0 531 1 NANNR0117 318690 8637646 70 97 0 - 90 84 2.0 507 1 NANNR0118 318681 8637674 70 136 0 - 90 86 2.0 566 11 128 2.0 625 4 NAR6308 318407 86 375 72 70 120 225 - 60 49 3.0 1056 0.00 100 80 1.0 1203 0.00 11 90 6.0 492 0.01 2 102 1.0 2936 0.17 3 NAR6313 318311 8637587 68 162 225 - 60 58 1.0 537 0.00 5 122 1.0 677 0.00 1 137 3.0 698 0.01 1 NAR6318 31828 0 8 637554 68 156 225 - 60 61 1.0 670 0.01 7 112 28.0 1456 0.04 3 NAR6320 318250 8637527 69 162 225 - 60 119 13.0 1805 0.01 3 NAR6324 318198 8637568 68 150 150 - 60 118 10.0 1117 0.02 5 134 6.0 1320 0.06 29 NAR6326 318174 8637538 68 144 15 0 - 60 115 2.0 597 0.00 2 NARD6016 318347 8637570 68 200 225 - 60 7 1.5 13.5 1855 0.10 2 9 8.5 5.5 738 0.01 3 109 20.0 1671 0.04 1 i ncl 1.1m @ 1.0% U3O8 from 122.4m NARD6017 318389 8637610 68 243 225 - 60 115 .1 24.9 3237 0.03 3 Page | 15 Prospect Hole East (m) North (m) RL (m) Depth (m) Az Dip From (m) Interval (m) U 3 O 8 (ppm) Au (ppm) Cu (ppm) incl. 2.0 m @ 1.0 % U 3 O 8 2 from 117.7m and 3.0m @ 1.0% U 3 O 8 2 from 127m Zeus NANNR0094 33251 8 864162 6 93 54 0 - 90 20 2 12 1220 48 4 8 1090 NANNR0095 332615 8641623 90 60 0 - 90 52 8 6 2095 NANNR0096 33261 5 864 152 6 89 60 0 - 90 42 4 7 1290 52 4 15 1280 NANNR0097 33262 1 8641425 88 66 0 - 90 20 12 16 2309 38 2 6 1120 NANNR0098 332669 8641494 88 60 0 - 90 38 12 6 2226 Overload NANND0129 312254 8633880 95 274 180 - 60 48 7.0 707 5 NANND01 63 312360 8633805 92 201 180 - 60 104 1.0 766 0.00 5 NANND0182 312360 8633831 92 292 180 - 85 115 3.4 631 2 NANND0183 312623 8633925 90 178 250 - 60 10 2.8 0.2 2264 12 NANNR0086 312584 8633836 90 60 245 - 60 34 2.0 731 54 NANND0207 312300 8634130 94 385 0 - 90 141.5 0.25 19575 0.74 42 Nabarlek 19NBDD002 317944 8638644 74 549 242 - 52 458 .1 0.3 526 0.25 260 NAD0087 317429 8638634 78 30 0 - 90 9 .2 2.7 1218 NAR0202 317451 8638610 77 19 240 - 60 0 8.0 1056 13 2.0 3850 NAD0079 3 175 33 8638464 79 32 0 - 90 21 .1 1.2 650 NAD0081 317511 8638498 78 29 0 - 90 19 .4 1.3 667 NAD0141 317818 8638268 80 52 240 - 55 49 .4 1.8 1500 NAD0174 317815 8638255 80 121 238 - 80 70 .2 1.2 700 NAMLR0023 318035 8637863 73 126 230 - 67 96 2.0 924 25 NASMD0209 317680 8638404 80 151 237 - 60 51 1.0 2889 190 NASMR0213 317728 8638431 78 119 0 - 90 45 1.0 649 22 NMLR026 317839 8638245 80 150 225 - 60 68 8.0 1557 0.09 18 North Bufaloo NMLR113 319320 8639762 64 120 176 - 60 60 1.0 595 1 0 Page | 16 Prospect Hole East (m) North (m) RL (m) Depth (m) Az Dip From (m) Interval (m) U 3 O 8 (ppm) Au (ppm) Cu (ppm) NMLR115 319126 8639804 65 136 176 - 60 21 11.0 1138 3 46 8.0 1014 3 61 1.0 548 3 SMLB NAR6382 315279 8640534 81 198 0 - 90 93 1.0 572 0.04 23 117 1.0 605 0.02 3 140 7.0 631 0.40 1 NAR6384 315346 8640482 79 180 0 - 90 72 5.0 587 0.00 3 94 1.0 534 0.00 3 100 1.0 2972 0.18 3 112 3.0 913 0.13 54 NASMD0002 315505 8640533 78 274 221 - 60 1 79.6 0.5 834 0.01 438 NASMD0179 315871 8640481 77 144 224 - 60 44 1.0 932 0.00 37 56 1.0 554 0.0 0 48 NASMD0221 315715 8640325 77 171 222 - 61 138 4.0 783 0.00 4 NASMD0225 315637 8640386 77 174 225 - 60 55 2.0 790 0.00 1140 NASMD0227 315534 8640424 78 179 225 - 60 85 3.0 615 0.00 500 93 1.0 601 0.00 145 NASMD0229 315314 8640565 80 205 22 5 - 60 115 10.0 591 0.00 5 133 6.0 1977 0.00 11 NASMR0242 316115 8640162 76 101 223 - 60 37 1.0 578 0.34 71 U40 19U4DD002 326954 8645002 74 550 88 - 60 1 79.5 0.7 1059 0.02 0 NAD7492 327141 8644994 63 124 90 - 60 5 6.5 4.0 651 0.07 13 7 5 6 .0 75992 0.69 19657 NAD7493 327222 8644998 65 111 270 - 60 80 .4 4.8 18535 4.47 31592 or 12.3 @ 0.73% U 3 O 8 , 1.8g/t Au, 2.0% Cu 3 from 78.9m incl 2.6m @ 8.1g/t Au, 1.6g/t Pd, 1.0g/t Pt 4 from 82.6m NAD7495 327141 8644973 64 111 90 - 60 8 0 .5 0.5 575 0.10 1270 NAD7498 327219 8645032 64 232 210 - 60 26 0.5 1037 0.06 2 18 6.5 0.5 1356 0.88 2 Page | 17 Prospect Hole East (m) North (m) RL (m) Depth (m) Az Dip From (m) Interval (m) U 3 O 8 (ppm) Au (ppm) Cu (ppm) NAD7500 327157 8645123 63 304 210 - 70 49.5 0.5 1851 0.02 40 173 .3 0.5 573 0.01 581 NAD7501 327200 8644993 64 144 285 - 65 54 5.2 1871 0. 91 303 NAD7503 327203 8645014 64 112 260 - 70 5 4.6 0.5 2983 0.14 1510 NAD7504 327203 8645014 64 81 260 - 60 44 .4 1.9 3506 0.15 32 NAD7506 327207 8644988 65 96 260 - 60 46 .2 0.5 662 0.02 41 5 3.9 0.5 1604 0.03 25 6 2.9 0.6 1332 0.21 11 70 NAD7508 327204 8645014 64 115 260 - 76 48 .3 0.5 624 0.02 93 NAR7389 327140 8644994 63 220 90 - 60 55 5.0 1132 0.11 10 78 4.0 14943 0.53 11160 NAR7514 327119 8644952 79 156 271 - 60 97 1.0 654 80 NAR7515 327204 8644952 80 150 271 - 60 56 1 .0 513 15 NAR7519 327099 8645053 78 138 271 - 60 59 1.0 554 3 NAR7520 327201 8645048 78 156 271 - 60 46 6.0 3087 40 68 4.0 1026 0.29 2 NAR7527 327117 8644900 78 144 271 - 60 23 2.0 3411 3 NAR7528 327188 8644898 84 186 271 - 60 79 7.0 6 28 195 U42 NAUAD0113 327443 8642483 80 100 180 - 60 3 7.5 6.6 476 3 NAUAR0100 327441 8642428 77 78 180 - 60 28 2.0 672 5 NAUAR0101 327435 8642408 77 78 180 - 60 26 1.0 660 1 NAUAR0102 327444 8642453 78 84 180 - 60 45 3.0 1203 1 NAUAR0106 3275 28 8642418 80 84 180 - 60 20 2.0 1038 2 28 2.0 613 2 46 2.0 684 2 NAUAR0108 327623 8642370 82 85 180 - 60 32 2.0 896 4 NAUAR0110 327528 8642468 82 91 180 - 60 44 2.0 507 20 54 2.0 601 9 NAUAR0112 327323 8642476 76 58 180 - 60 48 1.0 3714 13 Page | 18 Table 1 – Nabarlek Project, Significant Intercepts for uranium, copper and gold • All intercepts are down hole lengths as true widths are unknown. • Drill holes intercepts from inside of Nabarlek Pit have been excised from table • Coordinates are GDA94 Zone 53 • Values are expressed as either ppm or %, whereby 10,000ppm = 1% • Numbers may be rounded • Blanks indicate no assays for commodity • Uranium intercepts use a lower cut-off of 500ppm U 3 O 8 with 4m internal dilution. Higher grade internal intercepts include o 1 Gold intercepts use a lower cut-off of 0.5g/t Au o 2 Uranium intercept uses a lower cut-off of 0.5% U 3 O 8 and >1m o 3 Copper intercepts above 0.5% Cu o 4 Gold intercepts above 1.0g/t Au • Zeus Prospect has used a lower cut-off 0.1% (1000ppm) for Cu Page | 19 Appendix A: JORC Table 1 Section 1 Sampling Techniques and Data Criteria JORC Code explanation Commentary Sampling techniques • Nature and quality of sampling (eg cut channels, random chips, or specific specialised industry standard measurement tools appropriate to the minerals under investigation, such as down hole gamma sondes, or handheld XRF instruments, etc). These examples should not be taken as limiting the broad meaning of sampling. • Include reference to measures taken to ensure sample representivity and the appropriate calibration of any measurement tools or systems used. • Aspects of the determination of mineralisation that are Material to the Public Report. • In cases where ‘industry standard’ work has been done this would be relatively simple (eg ‘reverse circulation drilling was used to obtain 1 m samples from which 3 kg was pulverised to produce a 30 g charge for fire assay’). In other cases more explanation may be required, such as where there is coarse gold that has inherent sampling problems. Unusual commodities or mineralisation types (eg submarine nodules) may warrant disclosure of detailed information. Since discovery of uranium mineralization at Nabarlek, the Project has seen various exploration activities since the 1970’s. The c ompany has reviewed historical reports covering the past 50 years of exploration activity and the majority of this activity has been captured into a drill hole and geochemical database. Whilst variations in methodology [all sections below] can be seen company to company, overall procedures follow acceptable standard practice and the differences are not considered to be material. Assays presented in this report come from standard laboratory analytical procedures by an independent laboratory. Queensland Mines Ltd (QML) • QML contracted Surtec Geosurveys to collect various regional exploration data across the project; including drilling, mapping, rock chip sampling, auger soil samples, bulk leach soils, trenching, radon track etch data, petrology and ground radiometrics. The work was split over two field seasons; 1988 sampling was primarily west of (AMG 66z53) 320000E, while 1989 sampling was mainly to the east with some follow-up of the western area work. • Drilling was by percussion and diamond technique. Drilling of the historical Nabarlek Deposit and surrounding area as presented in this release come from historical Annual Reports, including Annual Report for Exploration Licence No 243, 1972 (CR19730071). Representivity and validation of drilling and assay results comes from the subsequent production history. • Validation of drilling results from QML is supported by subsequent reporting which relied on these results for the Report on Mineable Ore Reserve Estimate, December 1976, using at lower cut-off grade of 0.1%, estimating: 494,471 tonnes @ 1.84% U 3 O 8 (20.1Mlbs U 3 O 8 ) Open cut mining at Nabarlek commenced in June 1979. Total Production from Nabarlek mill was 24Mlbs U 3 O 8 . • 25,313 Auger soil samples were collected initially on a 200m x 100m grid, with infill to 100m x 50m and 50m x 25m spacing. Samples were collected from nominal depth of 0.5m using a petrol powered, or hand, auger. About 1 – 2 kg was collected from each site and sent to for analysis. • Track etch cups were supplied by Terradex (Illinois). Cups used the soil sample auger holes (nominal 0.5m deep). Where rock prevented a suitable hole being dug, cups were placed over a suitable crack or joint and covered by soil. Of the 25313 cups installed, a small number were unable to be read due to being dam aged Page | 20 Criteria JORC Code explanation Commentary or unable t o be retrieved. • 441 rock chip samples were collected at sites at the discretion of the sampler. Veining, altered rock and structural zones such as brecciation were targeted. DevEx Resources (DEV) formerly Uranium Equities Limited • Reverse Circulation holes (nominal 5-inch face sampling hammer) and Diamond Drill holes (NQ2 core sometimes with HQ diameter core to improve recovery in the more weathered rock at the top of holes) were sampled using industry standard procedures for collection. • For reverse circulation holes; individual, nominal 3kg, 1m samples were split via riffle splitter from the bulk drill sample which was sent for analysis at an independent laboratory (e.g. NTEL Darwin). Over time, various methods were used to select 1m samples; handheld XRF results, laboratory results on composites, hand held scintillometer, down hole gamma log measurements or geological observations. • In the case of first pass XRF scanning (annually calibrated), 4 to 5m composite samples were spear sampled from the bulk sample for preliminary XRF field analysis. Based on the outcome of the field XRF analysis, selected intervals were riffle split in the field from the initial bulk sample to produce a ~3kg sub- sample which was sent for analysis at an laboratory (e.g. NTEL Darwin). • In the case of laboratory analysed composites; a 5m composite was created in the field by spear sampling the 1m bulk drill samples. These were sent to the laboratory and treated with the same QAQC oversight as the later 1m samples. • All core was collected in industry standard steel or plastic trays. Half core samples were taken from NQ2 diamond drilling [1/2 core) at typically 0.2 to 1.5m intervals or as geology dictates. AFMEX • Reverse Circulation holes and Diamond Drill holes. All holes probed with down-hole gamma logger. Samples selected on the basis of anomalous radioactivity. Sandstone intervals composited over 10m. Cameco Australia (Cameco) • Previous Reverse Circulation and Diamond Drill holes Drill holes (NQ2 core) were sampled using industry standard procedures for collection. Samples were collected based on hand held scintillometer, down hole gamma log measurements or geological observations. Half core samples were taken from NQ2 diamond drilling [1/2 core) at typically 0.5m intervals or as geology dictates. Reverse Circulation drilling typically collected 1 metre individual samples via a riffle splitter for analysis. • Aircore drilling carried out by Cameco Australia pre- 2010 involved the collection of a bottom of hole sample (grab sample) and submissions of this sample to laboratory for analysis. Intervals selected range from 1 metre to 4 metres in composite. Cameco Australia report that sampling was carried out under Cameco Australia’s Standard Sampling Methodology and Procedure Protocol. Cameco Australia report the submission of duplicate samples on a 1 in 20 interval with standard samples submitted at every 1 in 20 also. • Although a Gamma Log was used in - hole, along with Page | 21 Criteria JORC Code explanation Commentary surface hand held XRF and scintillometer machines, they were only used as confirmatory and first test techniques. All assays presented in this report come from standard laboratory analytical procedures by an independent laboratory. • For aircore holes, drill spoil was piled in 1m intervals and scanned by handheld scintillometer. Representative 1m samples collected in chip-trays and scanned by an Analytical Spectral Device (ASD). Samples for analysis were sampled in nominal 4m composites or from selected zones based on scintillometer, ASD or geology. Samples were sent to independent laboratory, NTEL, Darwin. • An alternative sampling technique on programmes of shallow aircore was to collect a bottom of hole grab sample for analysis varying from 1 to 4 metres down hole. As these aircore results are not included in any re sou rce definition work this is considered acceptable. Drilling techniques • Drill type (eg core, reverse circulation, open - hole hammer, rotary air blast, auger, Bangka, sonic, etc) and details (eg core diameter, triple or standard tube, depth of diamond tails, face-sampling bit or other type, whether core is oriented and if so, by what method, etc). QML • For QML, drilling companies included Gaden Drilling from Batchelor (1988) and Rockdrill (NT) (1989). The 1988 drilling comprised open hole percussion (typically 50- 60m maximum depth). From 1989, reverse circulation was used. Diamond tails were drilled on several holes. • QML also undertook shallow RAB drilling, such as at Zeus Prospect.. DevEx & Cameco, AFMEX • Reverse Circulation and Diamond Drilling to industry standard. A multipurpose truck mounted rig from Century Drilling was primarily used. Limited helicopter supported diamond drilling. Diamond drilling consists of standard HQ/ NQ diamond drilling. • Reverse circulation drillholes were completed utilising a face sampling hammer. Diamond drilling consists of standard HQ/ NQ diamond drilling with some orientation work attempted using various down-hole tools. • Aircore holes were drilled to refusal or where stopped by drill conditions. Drill sample recovery • Method o f r ecording and assessing core and chip sample recoveries and results assessed. • Measures taken to maximise sample recovery and ensure representative nature of the samples. • Whether a relationship exists between sample recovery and grade and whether sample bias may have occurred due to preferential loss/gain of fine/coarse material. QML • Drill recoveries are not reported by QML. Drilling was typically diamond core. Sample recovery is reported as good and seldom less than 80% of inside the mining lease. QML noting an improved sample return from RAB and open hole to RC drilling was adopted. AFMEX • Recovery not noted on reverse circulation logs. Recovery in diamond core generally at or close to 100% with lesser recoveries in discrete broken zones and near surface if no pre-collar used. Use of HQ core in upper parts of holes would have assisted recovery. DevEx & Cameco • Diamond core recoveries were not discussed by Cameco Australia. However visual observation of drill core photos show good recovery of competent core and the risk of low sample recovery is considered to be low. • Photo observations of the diamond core before cutting are that core was reconstructed into continuous runs for structural orientation and depth marking. Depths were checked against driller core blocks. • There is no bias noted between sample recovery and Page | 22 Criteria JORC Code explanation Commentary grade. Go od recoveries were obtained from both Diamond drilling based on core photos which were taken at the time immediately before sampling. Although details of sample recovery in RC hole NAR7389 is not discussed, the twinning of this hole by NAD7492 is considered sufficient. • The purpose of the aircore drilling is as a first pass mapping tool of basement geochemistry and geology and sample recovery is not considered material. No record on recovery is available. Logging • Whether core and chip samples have been geologically and geotechnically logged to a level of detail to support appropriate Mineral Resource estimation, mining studies and metallurgical studies. • Whether logging is qualitative or quantitative in nature. Core (or costean, channel, etc) photography. • The total length and percentage of the relevant intersections logged. QML • Drillholes were logged over whole length in “longhand” and “typed up”. In developing databases holes were relabeled e.g. RC0049 to NANNR0049. Logs are qualitative. • Geochemical samples were auger soils, rock-chip and radon track etch. Programmable handheld electronic notebooks were used by field crews to record all information. • Details such as placement and removal dates were recorded for radon track etch surveys. Rock chip samples had a brief long hand description that included (when relevant) such things as, lithology, veining, alteration and structure. AFMEX • All holes were logged in their entirety in longhand. Logs noted lithology, alteration, structure and mineralization. Diamond core was also graphically logged. Recoveries are recorded and qualitative comments on rock competency made. DevEx & Cameco • Diamond drill holes were logged geologically including but not limited to weathering, regolith, lithology, structure, texture, alteration and mineralisation and also geotechnically for recovery and RQD. Logging was at an appropriate quantitative standard to support future geological, engineering and metallurgical studies. • RC holes were logged geologically including but not limited to weathering, regolith, lithology, structure, texture, alteration and mineralisation. Logging was at an appropriate quantitative standard to support future geological and metallurgical studies. • AC holes are designed for the purpose of determining the presence of mineralisation and its characteristics. Logging recorded basic regolith, lithology, alteration and mineralization details. Sufficient for this purpose. This drilling was not designed for the purpose of Mineral Resource Estimation. • Logging is considered quantitative in nature and all holes were logged over full depth. Sub - sampling techniques and sample preparation • If core, whether cut or sawn and whether quarter, half or all core taken. • If non-core, whether riffled, tube sampled, rotary split, etc and whether sampled wet or dry. • For all sample types, the nature, quality and appropriateness of the sample preparation technique. • Quality control procedures adopted for all sub-sampling stages to maximise representivity of samples. • Measures taken to ensure that the sampling is representative of the in-situ material collected, including for instance results for field duplicate/second-half sampling. QML • Drilling was typically diamond core. Assay results are from diamond core halved on site by splitting with a Mindrill core splitting guillotine. • Sample preparation techniques, representivity, quality control, sample sizes are all considered appropriate as production history closely matched the Ore Reserve which these drill holes were used to calculate. • For soil sampling, about 1 to 2 kg of soil was collected, bagged and sent to Classic Comlabs Darwin (an independent laboratory) for sample preparation. In Page | 23 Criteria JORC Code explanation Commentary • Whether sample sizes are appropriate to the grain siz e of the material being sampled. sample preparation, the entire sample was pulverized (or pulverized a 1 to 1.5kg split if original sample was too large). A sub-sample was sent to Classic Comlabs Adelaide for digest and analysis. • The track etch cups were left buried for 30 days before being retrieved and dispatched to Terradex for analysis and interpretation. AFMEX • Methodologies for sub-sampling not reported. However, AFMEX and their JV partners all had established exploration procedures that met industry standards. DevEx & Cameco • Diamond core was sawn in half unless gamma readings were sufficient to avoid sawing. In the case of elevated gamma readings, the core was manual cut using a core splitting device. Visual observation of nearby remaining core after splitting indicates that it is a representative sample. Duplicate samples were quarter core. • 1 meter RC samples were split off the drill rig into calico bags using a riffle splitter. Samples sent for assay are reported to be >95% dry in nature. • In the case of half core, the same half was consistently sent for assay over the length of a hole to reduce sampling bias. • Cameco Australia reported usage of their own internal sample preparation techniques. • Field duplicate samples were typically sent every 20th sample to check for repeatability. There are no apparent repeatability issues observed in the results. • The sample sizes are considered to be appropriate for the style of mineralisation observed which is typically fine grained . Quality of assay data and laboratory tests • The nature, quality and appropriateness of the assaying and laboratory procedures used and whether the technique is considered partial or total. • For geophysical tools, spectrometers, handheld XRF instruments, etc, the parameters used in determining the analysis including instrument make and model, reading times, calibrations factors applied and their derivation, etc. • Nature of quality control procedures adopted (eg standards, blanks, duplicates, external laboratory checks) and whether acceptable levels of accuracy (ie lack of bias) and precision have been established. QML • At Classic Comlabs Adelaide, soil samples were analyzed for: Element method LDL U XRF 4ppm Th XRF 4ppm As XRF 2ppm Cu AAS 2ppm Pb AAS 4ppm Zn AAS 2ppm Ni AAS 4ppm Fe AAS 0.01% • The track etch cups were left buried for 30days before being retrieved and dispatched to Terradex for processing. • Two sequences of Radon cups were left in the ground for 104 / 165 days as a QC check on the selection of 30 days as a standard Rn collection period. Radon track etch data data from these cups expressed as picoCuries/ litre/ day were close to levels reported by cups installed for the regular 30day period. Suggesting 30days was sufficient to remove fluctuations due to climatic and soil conditions. • Rock chip sample preparation and analysis were not documented. However, results show analysis covered the same elements with the same detection limits as the soil samples. • Drill - holes were analyzed for the same suite of elements Page | 24 Criteria JORC Code explanation Commentary as the so il samples. AFMEX • The samples were submitted to independent laboratory, Ultratrace in Perth and analysed for Au, U, Th, As, Ag, Co, Cu, Fe, Ni, Pb, V and Zn by ICP-MS/OES. Where sandstone drill core was composite sampled over 10m intervals it was analysed by Ultratrace for Al2O3, CaO, Fe2O3, K2O, MgO, Na2O, TiO2, Na2O TiO2 P2O5, U, Th, As, B, Ni, Pb, V and Zn by ICP-MS/OES. Where U exceeded 2ppm the sample was reanalysed using an aqua regia digest to determine labile uranium. XRD and PIMA were also conducted on sandstone at regular intervals. DevEx (Uranium Equities) • Riffle spilt 1m samples were typically sent to NTEL, Darwin for 4-acid (nitric, hydrochloric, perchloric, and hydrofluoric) digest with ICPMS finish for Ag, As, Bi, Co, Cu, Ni, Pb, Th, U and Zn. Fo ur metre composites (selected via handheld XRF scan) were typically sent to Intertek NTEL Darwin for sample preparation and then Intertek Adelaide for analysis by four a cid digest with a 60 element ICPOES or ICPMS scan and 50g Fire Assay for Au, Pt and Pd. Cameco • The assay procedures used are considered best practice and total (digest) in nature. Reverse circulation and diamond core samples were sent for 50g fire assay (Au-AA26) and 4 acid ICP-AES (ME-ICP61) suit. All samples were submitted to Intertek NTEL in Darwin for sample preparation and multielement analysis. A split of each pulp was submitted to North Australian Laboratories Pty Ltd in Pine Creek for Au, Pt, and Pd analysis using Fire Assay with ICPMS or ICPOES finish. The pulp is digested using a mi xed acid digest (nitric, hydrochloric, perchloric, and hydrofluoric) with a double deh ydration with perchloric acid. The sample is read using either ICPMS or ICPOES, depending on the element. • Aircore samples were sent to NTEL of Darwin, for a suite of over 50 elements, and 4 lead isotopes by weak acid leach. DevEx (2019) • Drill samples were analysed at an independent laboratory – NTEL, Darwin. Gold via 50g lead collection fire assay with ICPOES finish. A selection of elements; Ag, As, Bi, Cu, Pb, U, Zn were analysed by 4-acid (nitric, hydrochloric, perchloric, and hydrofluoric) digest with ICPMS finish. Verification of Sampling and assaying • The verification of significant intersections by either independent or alternative company personnel. • The use of twinned holes. • Documentation of primary data, data entry procedures, data verification, data storage (physical and electronic) protocols. • Discuss any adjustment to assay data. QML • Uranium was analyzed and reported as Uranium in parts per million. Uranium is readjusted as U3O8 based on standard measurements. • No adjustments to other commodity assay results have been made. AFMEX • Uranium was analyzed and reported as Uranium in parts per million. Uranium is readjusted as U3O8 based on standard ratios. • In the case of 10m sandstone composites, Al, Ca, Fe, K, Mg, Na, Ti, P were reported as oxides by the laboratory. DevEx & Cameco • Significant intersections were checked by Cameco and Uranium Equities staff at the time of drilling. • A twin hole (NAD7492) has been drilled for comparative purposes of NAR7389. The prospect is still considered Page | 25 Criteria JORC Code explanation Commentary to be in an early exploration stage. • Primary data was typically collected using DHLogger and is digitally stored as an Access Database. • Potential uranium ore was analysed by industry standard techniques such as ICPAES and ICPMS in an independent accredited laboratory with QAQC procedures and reported as uranium in parts per million. Uranium was later quoted as U3O8 based on the standard conversion ratio. • No adjustments to other commodity assay results have been made. Location of data points • Accuracy and quality of surveys used to locate drill holes (collar and down-hole surveys), trenches, mine workings and other locations used in Mineral Resource estimation. • Specification of the grid system used. • Quality and adequacy of topographic control. QML • A 1988 geodetic survey established an accurate mapping and grid base and produced a series of 1:10000 scale orthophotomosaic maps. Surveyed grid baselines were linked to the National AMG (66 zone 53) coordinate system. All drill collar positions were surveyed and their AMG coordinates and AHD RL’s recorded. • At Nabarlek Mine and surrounding areas, a local mine grid was used. The mine grid to GDA grid has been re - established. Historical surveyed base lines have been used to locate drill holes and outcrop in the field. • Grid Deviation Diagram • Details of downhole surveys are poorly recorded. AFMEX • AFMEX reported coordinates in a UTM grid although the method of capture is not recorded. Drilling w as confined Page | 26 Criteria JORC Code explanation Commentary to prospects already defined by QML and locations are considered reliable. A limited number of single shot Eastman camera down-hole surveys at a nominal 50m spacing were done on each diamond hole. DevEx & Cameco • Downhole surveys on angle holes were completed a Relex or similar tool with surveys taken at 30 to 60m intervals. • Hole collar locations have been picked up using a handheld DGPS or GPS with a +/- 2 to 3m error respectively. • Aircore drilling was vertical. • The grid system used for location of all drill holes and as shown on all figures is MGA_GDA94, Zone 53. • RL data as recorded from GPS, is considered unreliable at present although topography around the drill area is relatively flat and hence should not have any significant effect on the current interpretation of data. The Company has carried out ground inspections of historical drilling at U40, Nabarlek South and other prospects. Many holes have rehabilitated beyond recognition in the field. Some holes were identified to provide reasonable confidence in the reported locations of holes and to also reflect on other holes nearby. Data spacing and distribution • Data spacing for reporting of Exploration Results. • Whether the data spacing and distribution is sufficient to establish the degree of geological and grade continuity appropriate for the Mineral Resource and Ore Reserve estimation procedure(s) and classifications applied. • Whether sample compositing has been applied. QML • Geochemical sampling including radon track etch data sampling was done on a square grid pattern of 200mE x 100mN spacing with selected areas down to 50m spacing (supported by survey control). • Rock chip sample spacing was very irregular clustered and dependent on targeted material outcropping. • Surtec targeted 9 sites with first pass drilling. Samples were based on individual 1m intervals. AFMEX • Drilling was exploratory in nature and designed to test for narrow plunging shoots at a flat lying contact. Drilling was not designed on grid patterns. DevEx & Cameco • Drilling was exploratory in nature and designed to test for narrow plunging shoots at a flat lying contact. Drilling was not designed on grid patterns. • The current spacing was not considered sufficient to assume any geological or grade continuity of the mineralised system. • Both core sampling and reverse circulation sampling relied on down-hole gamma and hand scintillometer measurements to dictate where uranium mineralisation may lie and subsequently determined sample intervals. Should other commodities such as gold and copper lie away from uranium, no sampling is likely to have occurred. Orientation of data in relation to geological structure • Whether the orientation of sampling achieves unbiased sampling of possible structures and the extent to which this is known, considering the deposit type. • If the relationship between the drilling orientation and the orientation of key mineralised structures is considered to have introduced a sampling bias, this should be assessed and reported if material. QML, AFMEX, DevEx & Cameco • Considering the lack of systematic drilling at the prospect, it is unclear whether the sampling will or won’t achieve unbiased results. • Outside of the Nabarlek mine itself, orientations of primary mineralisation are poorly understood. Sample security • The me asu res taken to ensure sample security. QML • Not specified however statutory documentation and transport requirements would have been met for drill Page | 27 Criteria JORC Code explanation Commentary samples. AFMEX • Not specified however statutory documentation and transport requirements would have been met for drill samples. DevEx & Cameco • Chain of custody is managed by Cameco Australia. Samples were stored on site before being transported by Cameco to the laboratory under permits required by the Northern Territory Government. Audits or reviews • The results of any audits or reviews of sampling techniques and data. QML, DevEx & Cameco • No review has been carried out to date. Section 2 Reporting of Exploration Results Criteria JORC Code explanation Commentary Mineral tenement and land tenure status • Type, ref ere nce name/number, location and ownership including agreements or material issues with third parties such as joint ventures, partnerships, overriding royalties, native title interests, historical sites, wilderness or national park and environmental settings. • The security of the tenure held at the time of reporting along with any known impediments to obtaining a licence to operate in the area. • The Nabarlek Prospect lies within granted Mineral Lease MLN962 and is owned by Queensland Mines Pty Limited (QML) a wholly owned subsidiary of DevEx Resource Limited. MLN962 is the renewal of Special Mineral Lease 94 granted on 23rd March 1979 to Mine and Process the Nabarlek Ore. MLN962 continues until the 22 March 2034 (thereafter subject to further application for renewal) • Mining Agreements between QML and the Northern Land Council provides details for commercial mining and extraction of uranium ore within the MLN962. Additional deeds and agreements exist between QML and the NLC permitting the Company to explore the lease including benefits provided to the Traditional Owners. • The Nabarlek project forms part of three granted Exploration Licences (EL10176, EL24371 and EL23700). All three exploration licences form part of the Nabarlek Project in which the Company (DevEx Resources Limited) hold 100%. Cameco has a claw– back right for 51% of any deposit exceeding 50 million lbs of U3O8 within the granted exploration tenure ASX Announcement on 11 September 2012. EL 10176 and EL24371 is subject to 1% royalty on gross proceeds from sale of uranium and other refined substances. • DevEx annually presents its exploration plans to Traditional Owners for comment and discussion. Planned activities, including drilling at Nabarlek were accepted by the Traditional Owners this year. • DevEx is unaware of any impediments to the company to operate in the area. • DevEx continues to operate under approvals given to is by the NT Governm ent under its annual Mine Management Plans (MMP). The current MMPs for Nabarlek Project exploration tenements are proceeding through the annual review by the NT Regulator – this includes planned drilling at Nabarlek South, Nabarlek, Zeus and other prospects. Exploration done by other parties • Acknowledgment and appraisal of exploration by other parties. Since discovery of uranium mineralization at Nabarlek, the Project has seen various exploration activities since the 1970’s. The company has reviewed historical reports covering the past 50 years of exploration activity and the majority of this Page | 28 Criteria JORC Code explanation Commentary activity h as been capture d i nto a drill hole and geochemical database. • QML discovered the Nabarlek deposit in 1970 during costeaning of a significant airborne radiometric anomaly. During 1970 and 1971 the orebody was delineated by drilling. • The majority of drilling within MLN962 was undertaken by QML between 1970 to 2007 when the DevEx Resources (then Uranium Equities) purchased QML. Following purchase of QML the DevEx has carried out exploration drilling within the MLN962. • Databases inherited by the Company were compiled by QML in the early 1990s. Reviews of historical reports were undertaken in and attempt to validated the drilling and geochemistry. Some data entry errors, and high grade holes were noticed and were corrected. • On the Nabarlek exploration licences, exploration was vetoed by Federal Government moratorium between 1973 and 1988. In 1988 EL2508 was granted to QML who explored the ground until close to the licence expiry in 1998. Between 1998 and 2003, a JV of AFMEX, Cameco and SAE Australia explored the ground concentrating on the SMLB, Nabarlek South and U65 prospects under 3 retention licences (ERL150 – 152). After the retention licences were surrendered, Cameco was granted exploration licences 10176, 24371 and 24372. The initial exploration was by Cameco with participation by DevEx from 2007 until 2017 when DevEx earnt a 100% interest. During its time Cameco Australia carried out several programmes of drilling as well as geological mapping and airborne geophysics. Geology • Deposit type, geological setting and style of mineralization. • Open cut mining at Nabarlek commenced in June 1979. Total production from the Nabarlek mill was 10,858 tonnes of U3O8 (McKay, A.D. & Miezitis, Y., 2001. Australia’s uranium resources, geology and development of deposits. AGSO – Geoscience Australia, Mineral Resource Report 1). • Nabarlek Uranium mineralisation is classed and a structurally-controlled, unconformity associated uranium deposit entirely hosted within basement rocks similar to other uranium mines in the Alligator Rivers Uranium Field • The rock types which host the Nabarlek orebody are metamorphic schists and amphibolites of the Myra Falls Metamorphics. The metamorphic rocks are faulted against the Palaeoproterozoic Nabarlek Granite which has been intersected in drilling at 450m below the deposit. The metamorphic schists were subsequently intruded by a sheet of Oenpelli Dolerite. At Nabarlek and surrounding prospects, uranium mineralization has been encountered in both the host metamorphic schists and the Oenpelli Dolerite. DevEx regard the uranium mineralization within the region to be structurally controlled uranium mineralization. • The Nabarlek orebody was deposited within the Nabarlek breccias. Surface mapping of the Nabarlek Shear south of the pit identified a silica flooded fault br eccia with minor uranium at the immediate pit boundary. Within the main ore body (inner zone) alteration is characterised by pervasive hematite, chlorite, white mica and the removal of quartz/silica (de- silicification). Chalcopyrite (copper sulphide) is reported in petrology as one of the dominant sulphides. Company Page | 29 Criteria JORC Code explanation Commentary hand held XRF spot analysis of available core from Nabarlek confirms a close association between copper and uranium at Nabarlek and other prospects such as U40. Apart from uranium, there is no record of routine analysis of metals associated with the Nabarlek mineralisation including gold. • DevEx views the Nabarlek Deposit and nearby U40 Prospect to bear close similarities including age, with the Coronation Hill Uranium, Gold and PGE deposit (see ASX announcement on 9th May 2019). • Previous exploration models used by explorers considered an unconformity type uranium model similar to that seen in the Proterozoic Athabasca Basin Uranium Province of North America. DevEx considers this model to be too restrictive and is adopting a more flexible hydrothermal mineral systems approach associated with structures such as the Gabo Fault, the Nabarlek Faults and the North Fault. • The Company consider that previous drilling, discussed within, support the concept that copper and gold is prospective within the Company’s tenements. Drill hole Information • A summary of all information material to the understanding of the exploration results including a tabulation of the following information for all Material drill holes: o easting and northing of the drill hole collar o elevation or RL (Reduced Level – elevation above sea level in metres) of the drill hole collar o dip and azimuth of the hole o down hole length and interception depth o hole length. • If the exclusion of this information is justified on the basis that the information is not Material and this exclusion does not detract from the understanding of the report, the Competent Person should clearly explain why this is the case. • Historical significant uranium intercepts fo r t he project are provided in Table 1. This table excludes any intercepts from within the mined-out portions of the Nabarlek pit. • Representation of all drilling carried out by various Companies over the past 50 years including QML, DEV & Cameco is presented within the figures of this report together with maximum U 3 O 8 values. This report is a summary of the highlights of previous exploration in the prospective area. Data aggregation methods • In reporting Exploration Results, weighting averaging techniques, maximum and/or minimum grade truncations (eg cutting of high grades) and cut-off grades are usually Material and should be stated. • Where aggregate intercepts incorporate short lengths of high grade results and longer lengths of low grade results, the procedure used for such aggregation should be stated and some typical examples of such aggregations should be shown in detail. • The assumptions used for any reporting of metal equivalent values should be clearly stated. • The Table within this report lists signif ica nt intercepts from the Project (excluding intercepts that lie within the mined Nabarlek pit ). Significant intercepts are determined using a lower cut-off grade of 500ppm U 3 O 8 with 4m of internal dilution. Several individual higher grade intercepts are reported when grades are at or above 0.5% U 3 O 8 • Holes from U40 Prospect are also reported for copper intercept using a lower cut-off grade of 0.5% Cu • Holes at Zeus Prospect are reported for copper grade using lower cut-off grade of 0.1%. • No top cuts have been used. • No Metal equivalents have been used. However, uranium assays were converted from their original lab reported element U to U 3 O 8 using accepted practice. Relationship between mineralisation widths and intercept lengths • These relationships are parti cul arly important in the reporting of Exploration Results. • If the geometry of the mineralisation with respect to the drill hole angle is known, its nature should be reported. • If it is not known and only the down hole lengths are reported, there should be a clear statement to this effect (eg ‘down hole length, true width not known’). • The drill intersections reported are not considered true widths. Further detailed geological analysis and drilling is required to determine the geometry of the intersected mineralisation. Page | 30 Criteria JORC Code explanation Commentary Diagrams • Appropriate maps and sections (with scales) and tabulations of intercepts should be included for any significant discovery being reported These should include, but not be limited to a plan view of drill hole collar locations and appropriate sectional views. • Refer to figures in the body of text Balanced reporting • Where comprehensive reporting of all Exploration Results is not practicable, representative reporting of both low and high grades and/or widths should be practiced to avoid misleading reporting of Exploration Results. • Significant uranium, gold and copper intercepts for drilling is reported in Table 1 with highlights provided on maps for location. • Maps show all drill holes on record, and present anomalous holes and prospects by their maximum U 3 O 8 grade. • At Nabarlek South drilling intercepts are represented in the third dimension due to multiple grids used on the prospect. All holes are shown, with intercepts coloured by the U 3 O 8 % x metres (down hole). • Radon track etch data is contoured and presented in the figures as contours. Individual data points are not shown due to the density of points (spacing of soil samples nominal 100mN x 200mE within infill in areas to 50mN x 100mE) and to avoid data clutter when presented against drilling information. • Uranium intercepts from within the mined portions of the Nabarlek Uranium Mine have been excluded from the Table of Intercepts, so to avoid misunderstanding of remaining intercepts. These “in-pit” intercepts have been previously reported by the Company for context to mineral deposit style (see ASX Release 9 th October 2018) Other substantive exploration data • Other exploration data, if meaningful and material, should be reported including (but not limited to): geological observations; geophysical survey results; geochemical survey results; bulk samples – size and method of treatment; metallurgical test results; bulk density, groundwater, geotechnical and rock characteristics; potential deleterious or contaminating substances. • Geological and geo chemical interpretations are presented within the figures provided. • Other information such as metallurgy, geotechnical and densities is currently immaterial. Further work • The nature and scale of planned further work (eg tests for lateral extensions or depth extensions or large-scale step-out drilling). • Diagrams clearly highlighting the areas of possible extensions, including the main geological interpretations and future drilling areas, provided this information is not commercially sensitive. • IP Geophys ics is planned to review the Zeus copper zone and broader trend between U40 and Zeus. • Regional mapping is currently underway, this work is aimed at historical alteration zones, and fault breccias in order to clarify the gold and base metal potential. Numerous radon track etch anomalies require field mapping and follow up over the coming 12 months. • The Company is planning to carry out additional RC/DDH drilling in the areas surrounding Nabarlek including • Nabarlek South • The Nabarlek to Buffalo trend • Zeus to U40 • Black Bream • Timing of this drilling is scheduled to take place over the coming 12 months.
More from DevEx Resources Limited
Join Listcorp to create a personalised news feed, follow your favourite companies, save useful news, and more.