Existing Prospects Confirmed And New Prospects Discovered In Queensland
Inca Minerals Limited (ASX: ICG) has substantially upgraded the potential of its MaCauley Project, located in northern Queensland, after discovering significant visible skarn-style copper mineralisation in multiple locations during a recent surface mapping and sampling programme.
The purpose of the field tip was to investigate recently identified prospect areasin the northern part of the project (Mount Brown, Carraway North and Wallaroo) that were generated from an independent review and remodelling of historical geophysical and geochemical and to investigate other new prospect areas identified in the central and southern parts of the project area.
Among other positive results, mapping has identified several mineralised skarn occurrences and a gossanous porphyry. A gossan is the weathered remains of sulphide mineralisation.
Accordingly, the Project has been elevated in terms of its potential to host skarn and/or porphyry/intrusive-related mineralisation with the discovery of multiple new and extensive occurrences of visible copper mineralisation reinforcing the opportunity to make a Tier-1 scale copper discovery.
A total of 110 samples were collected from 12 prospect areas. The samples were collected from a variety of exposures, including from in-situ natural outcrop and/or mine work exposures or from float (loose material) from the ground and/or mine working tailings/dumps. They have now been submitted for assay.
Mt Brown Prospect
The Mt Brown Prospect (Mt Brown) is located in the northern part of MaCauley Creek, approximately 5km south-west and along strike from the Mt Moss Fe-skarn mine.
It was recognised as a skarn-porphyry target following an independent review of past exploration). It hosts a subtle magnetic high anomaly (1.0km x 0.5km) and known copper, gold, silver, molybdenum, lead, and zinc mineralisation, with historic peak values 8.22% Cu, 96ppb Au, 127g/t Ag, 245ppm Mo, 3.60% Pb, and 2.04% Zn
. As a result of the positive review Mt Brown was mapped and sampled by Inca for the first time during the recent field trip. A total of 18 samples were taken.
Mapping has resulted in the identification of gossanous quartz porphyry intrusions, chalcopyrite-magnetite skarn mineralisation and multiple historic small copper and tin mine workings.
Mt Brown is an exceptional prospect that has been materially elevated in exploration potential as a result of the current field trip. Mt Brown hosts gossanous porphyry intrusions, copper-magnetite skarn mineralisation, numerous historic mine workings, a discrete magnetic high anomaly and strong historic sample results. It is along strike from a known skarn deposit. For all these reasons, Mt Brown is considered highly prospective for potentially economic porphyry-skarn mineralisation.
The Wallaroo Prospect (Wallaroo) is located in the northern part of MaCauley Creek, approximately 5km southeast of the Mt Moss mine.
Like Mt Brown, it was recognised as a skarn-porphyry target following an independent review of past exploration (ASX announcement 28 September 2021). It hosts a coherent magnetic high anomaly (1.25km x 0.5km) and known copper, silver, lead, and zinc mineralisation, with historic peak values 5.45% Cu, 132g/t Ag, 0.61% Pb, and 3.72% Zn. As a result of the positive review Wallaroo was mapped and sampled by Inca for the first time during the recent field trip. Twenty-one samples were taken.
Mapping has resulted in the discovery of multiple copper-lead-zinc skarn-like units over a zone 850m in strike length and 250m width, with individual skarn units varying in thickness from 0.5m to 7m.
This discovery strongly correlates with the magnetic high anomaly that likely associates with abundant massive magnetite float observed in parts of the prospect. Mapping recognised the occurrence of metal sulphides, chalcopyrite, sphalerite and galena and strong secondary copper minerals within these poorly sub-cropping, recessive skarn-like units.
For further information please visit: https://www.incaminerals.com.au/