The Wilki Farm‐in 2021 exploration programme had an emphasis on both greenfield discovery with a focus on Havieron, Winu, Telfer and Nifty analogue targets within 10 to 50km of the Telfer gold‐copper mine and processing facility, and brownfield gold±copper resource growth opportunities within 15km of Telfer. A total of forty‐three drill holes (7,422m awaiting assay results for 610m) testing twelve greenfield and two brownfield targets and fixed‐loop ground
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electromagnetic (FLEM) surveys were completed at six targets. Available results for the programme are summarised below.
Brownfield 2021 Exploration Programme Results
Reverse circulation (RC) drilling (seven holes for 1,238m) evaluating Mineral Resource extensional and conceptual targets at the Chicken Ranch and Tim's Dome deposits, both located within 15km of the Telfer processing facility, intersected narrow zones of gold±copper mineralisation. Several holes failed to achieve target depth due to abnormally high volumes of groundwater in conjunction with very deep oxidation profiles extending down up to 200m below the surface (refer to Tables 1 and 2 and Figure 2). Intersections included:
2.0m at 1.15 g/t gold from 146.0m down hole in 21CRC0002 (Chicken Ranch)
7.0m at 1.29 g/t gold from 156.0m down hole in 21CRC0002 (Chicken Ranch), including:
3.0m at 2.70 g/t gold from 156.0m down hole in 21CRC0002 (Chicken Ranch), also including:
1.0m at 6.56 g/t gold and 0.11% copperfrom 156.0m
4.0m at 1.09 g/t gold and 0.17% copper from 211.0m down hole in 21CRC0002 (Chicken Ranch)
1.0m at 3.65 g/t gold from 138.0m down hole in 21CRC0004 (Chicken Ranch)
9.0m at 0.74 g/t gold from 82.0m down hole in 21TDC0044 (Tim's Dome), including:
1.0m at 2.57 g/t goldfrom 83.0m
Greenfield 2021 Exploration Programme Results
RC (36 holes for 5,901m) and diamond core (DD) (one diamond tail for 283m) drill testing of 12 greenfields SkyTEM™ aerial electromagnetic (AEM), magnetic and geochemical targets intersected minor zones of anomalous copper±zinc±lead and other pathfinder elements, however no ore grade mineralisation was identified. Refer to the summary below and Tables 1 and 2 and Figure 2:
WEM-20= Strongly anomalous zinc‐lead‐molybdenum (including 24.0m at 0.10% zinc and 300ppm lead from 100.0m downhole in 21WKC0016). Several FLEM conductivity anomalies identified with modelling in progress. Review ongoing.
Protos-9= Patchy calc‐silicate hydrothermal alteration, similar to early stage Minyari alteration, with minor gold‐copper‐zinc and pathfinder anomalism. Strong bedrock FLEM conductivity anomaly identified in proximity to drill hole 21WKC0022 with modelling in progress. Review ongoing.
Tyama = Localised hydrothermal calcite‐quartz‐chlorite‐pyrite narrow veins and breccias anomalous in zinc ± lead, possibly representing a distal mineralisation phase above the target magnetic anomaly. Review ongoing.
Triangle North = Intense goethite "altered" with minor zinc‐lead anomalism. Review ongoing.
Weak anomalism detected = WEM‐04, Golden Web, Hastie's Far East and Pajero/Big Banana returned weak copper ± pathfinder (arsenic and/or bismuth and/or antimony) anomalism; no follow up exploration is planned for these targets.
No anomalism detected = AEM20‐02, Hastie's West and Joy's Gossan targets did not return any significant results; no follow up exploration is planned for these targets.
Dagga = Awaiting results for six RC drill holes (366m).
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Fixed‐loop Ground Electromagnetic Survey Results
A programme of FLEM surveys (total of 15 FLEM loops each generally between 200 to 300m in size) were completed over six greenfield targets with the aim of identifying bedrock massive sulphide related electromagnetic conductivity anomalies. Preliminary review of the FLEM data has identified interpreted bedrock EM conductors at WEM‐20, Protos‐9 and the newly identified target WEM‐44, with processing and modelling ongoing.
Ongoing Exploration Activities
The review and interpretation of the 2021 drill hole and geophysical exploration data in conjunction with historic data to enhance geological modelling, and potentially identify further target areas for gold‐copper mineralisation is ongoing.
Tetris Havieron Look‐alike Gold‐Copper Target EIS Grant
Antipa's Exploration Incentive Scheme (EIS) application for diamond core testing of a Havieron look‐alike partially co‐incident magnetic and gravity target called Tetris (Figures 1 and 3) was successful with an EIS funding grant of $190,000 being awarded by the Western Australian Government. Antipa would like to acknowledge the ongoing support provided by the WA Government for its EIS programme which preferentially funds high quality, technical projects that are assessed by a panel on the basis of geoscientific and exploration targeting merit.
Paterson IGO Farm-in Project 2021 Exploration Programme Summary
The Paterson Farm‐in 2021 activities form part of a regional or project scale staged exploration programme with an emphasis on greenfield discovery of Nifty, Winu, Telfer and Havieron analogue targets.
Results are pending for the two major components of this year's programme which were a regional /project scale stratigraphic and geochemical air core drill programme covering an area of approximately 350km2 (168 holes for 11,346m) and soil geochemical sampling programme covering an aera of approximately 650km2 (2,589 samples) (refer to Figure 3).
During the first quarter of next year the 2021 results will be analysed in conjunction with other data sets to define a tectono‐stratigraphic framework and identify and rank new greenfield exploration targets for direct drill testing in the CY 2022.
E45/2519 Havieron Look‐alike Gold‐Copper Targets EIS Grant
Antipa's Exploration Incentive Scheme (EIS) application for diamond core testing of two Havieron look‐alike magnetic targets located 15km along trend from Rio Tinto's Winu copper‐ gold‐silver deposit on tenement E45/2519 (Figure 1) was successful with an EIS funding grant of $150,000 being awarded by the Western Australian Government.
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Figure 1: Plan showing location of Antipa 100% owned tenements,Antipa-RioTinto Citadel Joint Venture,Antipa-NewcrestWilkiFarm-in,Antipa-IGOPatersonFarm-in,Newcrest Mining Ltd's Telfer Mine and O'Callaghans deposit, Rio Tinto's Winu deposit, Newcrest/Greatland Gold plc's Havieron deposit, and Cyprium Metal's Nifty Mine in WA's Paterson Province. NB: Rio and IGO "100%" tenement areas include some related third‐party Farm‐in's. NB: Regional GDA2020 / MGA Zone 51 co‐ordinates, 50km grid.
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Figure 2: Plan showing Wilki Project 2021 priority electromagnetic conductivity, aeromagnetic and gravity targets identified for RC drill testing. NB: Over Airborne magnetic image; TMI‐RTP grey‐scale NESUN and Regional GDA2020 / MGA Zone 51 co‐ordinates, 20km grid.
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