The Murchison Project encompasses three separate tenement holdings targeting gold bearing hosts in different geological settings. Cuddingwarra, Big Bell South and Cue cover a total project area of approximately 425km2 with several high priority targets that require additional exploration.
The Cuddingwarra Project is considered highly prospective to GSM’s regional gold exploration strategy. The tenements are considered positive, ‘Greenfields’ exploration ground and cover substantial, prospective and underexplored greenstone stratigraphy and structure in a well-endowed gold mining district either along strike, or in the vicinity of previous and current gold mining operations.
The Cuddingwarra tenements are located approximately 10km west and northwest of the Cue townsite neighbouring a mining centre consisting of several shallow open pits which produced over 1.3Moz of gold.
The tenements cover an area of approximately 78km2 and are situated within the Archaean Meekatharra-Wydgee Greenstone Belt comprised of thick sequences of basalt and mafic rock with banded iron formation, ultramafic, felsic volcanic and volcaniclastic rocks. Felsic porphyries and granitoids have also intruded the layered sequence. The primary targets are structural features such as faults and splays off major strike extensive shear zones such as the Cuddingwarra Shear.
A recent targeting study at Cuddingwarra resulted in the generation of 12 priority gold targets. The study not only highlighted the prospectivity of the tenure, but also the need to more adequately test the sparse historic drilling completed to date.
Targets at the Cuddingwarra Project include areas with shallow drillholes and gold anomalism, coincident gold-in-soil and base-metal anomalies and SAM (Sub Audio Magnetic) geophysical anomalies.
Big Bell South
The Big Bell South Project comprises a large, single exploration licence (E 21/193, approximately 55 km2) and is located 20km south of the multi-million ounce Big Bell gold mine.
The Big Bell South Project area captures the interpreted thin, southern extension of the south trending Big Bell Greenstone Belt and the Chunderloo-Big Bell Fault, a major structural feature extending 80km from Meekatharra in the north to the Dalgaranga Fault.
Previous explorers work on and around the Big Bell South Project includes greenfields reconnaissance regional soil surveys, rock chip sampling, ground and air magnetic surveys and wide-spaced Aircore (AC) and Rotary Air Blast (RAB) drilling. The previous drilling consists of wide-spaced lines of discrete drill fences which has not systematically tested the predominantly sand covered project, although elevated gold values up to 170 ppb Au approximately 300m north of the project area were recorded. Historic logging also reported interpreted shallow sulphide mineralisation and quartz veining from the northern section of the project area.
The Big Bell Project area captures an encouraging greenstone belt extension along trend of a major gold mine and a regional structure and is underexplored. The Company has completed new targeting and field reconnaissance work and has highlighted two broad target areas for follow-up investigation.
The Cue tenements are located immediately north of Cue Town and cover an area of approximately 32km2. The geology is dominated by a hybridised tonalite body known locally as the Cue granite which has intruded the greenstone sequence. Gold mineralisation generally occurs within quartz veins and sheets hosted within the granite at faulted granitoid contacts with sheared greenstone enclaves. Deep drilling of geophysical targets to date by GSM has revealed a major contact metamorphic zone at the granite-greenstone contact and broad intervals of shearing containing variable silica and feldspar (albite) with weak to intense chlorite-carbonate-pyrite alteration.
Key targets in the immediate Cue area include additional exploration drilling and evaluation work immediately along strike and down dip and plunge centred on the historical workings.
Cue has a rich history of gold mining dating back to 1892 when gold was discovered there by Mr. Michael John Fitzgerald on New Year’s Day, while travelling with two Aborigines over what is now called Kintore Blow. During the same year, gold was discovered 6km to the southwest of Cue at the Day Dawn gold mining centre by Edward Heffernan. The town is named after Tom Cue who first registered their claim at Nannine, over 80km away, where the nearest mining warden was located.