APTA update5 Jan 2025 14:41
Although current attention is understandably focussed on PEPAS, comments by Brad during the recent presentation provide valuable insight into his assessment of the potential at the APTA prospect and why the process towards an NI-43-101 Mineral Resource Estimate [MRE] is proceeding with such caution. My post of 20.10.2024 in response to the premature expectancy of an imminent MRE for APTA, expressed by some on this chat board, outlined some of the constraints, so it is reassuring to hear Brad's confirmation of these and of other more geo-technical aspects which I have detailed in several earlier posts. Before enlarging on these issues and in recognition of the presumed new-comers to OMI, the following extracts from previous posts should provide appropriate context regarding the potential resource at APTA.
From an 02.02.2023 post, the following five paragraphs:
Those familiar with the background to the APTA prospect will know that the baseline for estimation of the gold resource is that produced [in January 2017] by MDA [Mine Development Associates] of Reno, Nevada who calculated a resource of 1.6M – 2.3M tonnes averaging between 3.2 – 3.7g/t au, based on the data from 53 holes. This indicated a potential resource of between 165,000oz and 274,000oz au.
I used the parameters inherent in MDA's calculations as the basis for an update on the potential resource, as posted in detail on 13.10.2018, and calculated an indicated resource of between 308,000 and 357,000oz au based on the then total of 71 holes drilled.
With the resumption of drilling in late 2020, I posted on 08.02.2021 that I had constructed a 100m3 block-model to quantify the results from hole 072 and 9 legacy holes within a 925-825m asl [above sea level] 100m3 block, resulting in an indicated resource of 114,907oz au, based on 1,234,530t @ 2.895g/t au; this being an illustration of the high yield from a single 100m3 block subject to high-grade mineralization.
Since then I extended the 100m3 block model to encompass all the data relevant to APTA and can confirm that the indicated resource based on my estimations now totals 2,342,717oz [troy] au, from 25.07M tonnes @ 2.61g/cm3 [sp.g. of assay samples] a total for which a 20% + or – error margin would be appropriate. In addition there is an estimated 8.613M tonnes of siliceous breccia ore, within the zones designated as 'high-grade' in the various cross-sections, for which there is no assay-data indicative of grade values. The data-points and calculations on which this is based are far too numerous to detail here. However, a total of 29, 100m3 blocks contributed to the total au resource, and 6 blocks to the additional ore-tonnage total.
To be continued