MaCauley Creek Cu-Ag-Pb-Zn-Mo Project
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Project Summary

The MaCauley Creek Cu-Ag-Mo Project, centred on a collection of historical mines in North Queensland, is considered highly prospective to host significant porphyry/intrusion-related and skarn style mineralisation. The Project consists of two exploration licences (EPM 27124 and EPM 27163) for a combined total of approximately 359 km2. Tenure granted in mid-2019.

Historical mining in the early 1900’s exploited shallow, supergene enriched Cu-Pb-Zn-Ag material, while more recent exploration in the 1990’s and early 2000’s principally focused on identifying additional shallow mineralisation. Standout historical drill intersections from the project include:

  • 20m @ 0.51% Cu + 2.64% Pb + 1.10% Zn + 85.9g/t Ag from 10m
  • 2m @ 2.03% Cu + 2.27% Pb + 0.10% Zn + 669g/t Ag from 10m
  • 12m @ 0.43% Cu + 1.14% Pb + 1.29% Zn + 101g/t Ag from 21m
  • 24m @ 0.27% Cu + 1.27% Pb + 0.87% Zn + 36g/t Ag from 7m
  • 17m @ 0.65% Cu + 4.17% Pb + 1.18% Zn + 103g/t Ag from 2m
  • 13m @ 0.49% Cu + 1.27% Pb + 0.22% Zn + 113g/t Ag from 0m
  • 12m @ 0.25% Cu + 2.20% Pb + 0.20% Zn + 109g/t Ag from 2m
  • 6m @ 1.38% Cu + 1.44% Pb + 1.01% Zn + 338g/t Ag from 16m
  • 77m @ 0.14% Cu + 0.74% Pb + 1.03% Zn + 30g/t Ag from 52m (assays incomplete)
  • 33m @ 0.34% Cu + 0.66% Pb + 0.61% Zn + 29g/t Ag from 18m
  • 13m @ 1.10% Cu + 5.19% Pb + 212g/t Ag from 16m
  • 4m @ 1.61% Cu + 3.12% Pb + 1.26% Zn + 133g/t Ag from 7m
  • 26m @ 0.50% Cu + 1.31% Pb + 1.15% Zn + 93g/t Ag from 27m
  • 5m @ 2.88% Cu + 0.14% Pb + 217gt Ag from 5m
  • 22m @ 0.51% Cu + 2.79% Pb + 66g/t Ag from 10m
  • 25m @ 0.33% Cu + 1.89% Pb + 63g/t Ag from 3m
  • 13m @ 0.28% Cu + 1.72% Pb + 1.03% Zn + 55g/t Ag from 0m

Although successful results were achieved by past explorers, potential for large-scale, low-medium grade porphyry/intrusion-related mineralisation has received limited attention despite granite-hosted disseminated sulfides being observed at a number of prospects. In the northern portion of MaCauley Creek, where metallic-enriched igneous units have intruded calcareous units of the Running River Metamorphics, potential for polymetallic skarn mineralisation also exists.

A review of available data at the MaCauley Creek Project has defined a number of compelling, large-sized targets that warrant exploration. These targets have been identified through historical stream sediment, soil, and rock chip results, and from detailed magnetics and trial induced polarisation surveying, and occur both proximal to and distal from known prospects and mines. Additional potential exists across the project for the discovery of small-medium sized, high-grade Cu-Ag-Pb-Zn mineralised lodes that could be targeted by induced polarisation surveying and shallow drill testing.

In 2019, the MaCauley Creek Project was acquired by Inca Minerals Ltd (ASX:ICG) under a joint venture and royalty agreement with MRG retaining a free-carried 10% ownership and 1.5% NSR.

To date, joint venture exploration undertaken has included geological reconnaissance and rock chip sampling with peak results of 49% Cu, 0.39g/t Au, 2,430/t Ag, 733ppm Mo, 43.3% Pb, and 6.02% Zn, acquisition and re-processing of detailed airborne magnetic-radiometric data, trial induced polarisation, and drill targeting studies.

Future work programs at MaCauley Creek may include geological mapping and sampling, expanded use of induced polarisation surveying, and drill testing.

Further information regarding MaCauley Creek can be found via Inca Minerals’ ASX announcements at www.asx.com.au/markets/company/icg or www.incaminerals.com.au