The oxide ore remains open along strike to the south east and at depth. The MRE has a defined significant proportion of oxidised BIF hosted ore, with 78% of the resource by tonnes being oxide or partially oxidised ore. The Indicated resource is confined to the north western area of 20 m by 20 m spaced drilling in the main resource domains. The Lucky Strike resource has been classified as Indicated and Inferred. Thirteen main domains of mineralisation having continuity over more than one section were modelled.Īn Ordinary Kriging (OK) algorithm was used to estimate Au in the modelled mineralised domains only. The primary mineralisation domains were modelled generally aligning with the subvertical Lower BIF and eastern Basalt contact. Above the upper or hanging wall BIF lodes, a flat lying supergene blanket was modelled. These surfaces often account for the dispersion of gold mineralisation outside of the modelled BIF units. Base of Complete Oxidation (BOCO), Top of Saprolite (TOSA) and Top of Fresh Rock (TOFR) events were captured during geological logging and oxidation event surfaces created. The footwall basalt contact was also modelled as a hard boundary. Most (90%) of the resource data is from RC drilling.Ī geological model was constructed which modelled south west dipping BIF units in detail as they are the primary host for mineralisation. An additional 1472m of Air Core drilling has been removed from the resource database. From 2017 to 2020 the Company completed 24,057 m of RC and Diamond drilling at Lucky Strike. Only drill hole samples from Reverse Circulation (RC) and Diamond Drill Holes were used in the estimation of grades. The estimate was based on 193 drill holes available as of 6 March 2020. The Lucky Strike in situ Mineral Resource Estimate ('MRE' or 'estimate') was prepared by Stephen Godfrey, principal of Resource Evaluation Services (RES). The area near Lucky Strike is a continued high priority exploration focus for the Company, with gold anomalies identified at Red Dale, Havelock, Neon, Capstan and more recently the Burns Au-Cu anomaly highlighting the district scale gold prospectivity. Aircore drilling in late 2017 discovered Lucky Strike, with subsequent multiple phases of RC drilling in 2018 identifying the gold system hosted by a north west trending Banded Iron Formation (BIF), part of which is hidden by approximately 12m of transported cover. The Lucky Strike Trend was identified in 2017 as a prospective structural corridor, adjacent to the regional scale Mt Monger Fault, after integration of previous exploration with detailed ground gravity data. Lucky Strike is located approximately 35km north east of Gold Fields Limited's (NYSE: GFI) (' Gold Fields') St Ives processing plant and 5km south west of the Randalls Processing Plant operated by Silver Lake Resources (ASX: SLR). Lucky Strike and its strike extensions are wholly within the granted ( 12 April 2019) Mining Lease M25/366. The Board of Lefroy Exploration Limited (ASX: LEX) ('Lefroy' or 'the Company') is pleased to announce the maiden Indicated and Inferred Mineral Resource Estimate (MRE) at Lucky Strike, within the Eastern Lefroy tenement package.Įastern Lefroy is part of the greater Lefroy Gold Project (LGP) located 50km to the south east of Kalgoorlie.
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