Quartz Circle Project
CAZ : 20%
The Quartz Circle Project is situated in the Eastern Pilbara Region of Western Australia and covers approximately 65 km² of ground prospective for base metals and gold. Numerous phases of exploration have been completed since the 1970’s with significant intercepts including 17.74m @ 16.1% Zn, 7.5m @ 16.0% Zn (with elevated lead and cadmium), 4m @ 9.3% Cu, 13.3 g/t Au and 4m @ 1.96% Cu, 11.6 g/t Au.
The Quartz Circle Project has the hallmarks of a large mineralised system, and there are indications that the base metals are VMS in style.
The Quartz Circle Project is located 25 kilometres north east of the gold mining town of Nullagine in the Pilbara Mineral Field of Western Australia. Exploration targets are presently volcanogenic models containing sediment-hosted base metal, silver and gold mineralization. Most of the VMS deposits in the Pilbara are hosted within the same felsic volcanic rocks of the Duffer Formation or stratigraphic equivalents.
Exploration for base metals has been conducted intermittently at Quartz Circle since about 1975. Some spectacular intersections were achieved by earlier explorers but these groups could not demonstrate continuity of mineralisation at or near the surface. More recent work has discovered new mineralisation in and around the historic target areas at Emperor and Igloo Prospects.
Reassessment of previous geochemical and recent geophysical surveys has led to confirmation of the volcanic-hosted massive sulphide (VMS) model with very large tonnage potential.
Similar mineralisation occurs in the Pilbara in the same geological unit of volcanics of the Duffer Formation such as Whim Creek, Sulphur Springs (Venturex Resources Limited), Lennons Find (Laconia Resources Limited), Orchard Tank (De Grey Mining Ltd) among others.
Many of the Pilbara VMS deposits occur in deformed rocks near the edge of large granite batholiths where the volcanic and sedimentary sequences have been tightly squeezed into synclines during granite emplacement. In contrast the Quartz Circle base metal project is situated within the McPhee Dome where deformation is minimal and the geometry of the VMS system is more easily identified.
The Duffer Formation at Quartz Circle comprises mainly dacitic tuff, lapilli tuff, and volcanic agglomerate with local hydraulic breccias (shattered by super-heated gases within the volcanic feeder pipe) and a tourmaline exhalite which is thought to have capped the VMS deposit in the Emperor area. There is widespread potassic alteration to sericite and more restricted chloritic alteration in the vicinity of base metal mineralisation typical of this style of deposit.
Immediate Targets for Exploration
Mineralisation and soil anomalies at Quartz Circle are arranged outwards from a tonalite felsic intrusion with the Cu-Au-Ag anomaly nearest to the intrusion and the Zn-Pb-Ag anomaly furthest away, consistent with thermal zonation relative to a sub-volcanic intrusion.
A recent ground-based gravity survey has revealed a moderately-strong gravity high at Emperor which increases in intensity to the southwest towards Imperial Prospect. This corridor of gravity anomalism coincides closely with the regional Pb-Zn-Ag geochemical anomalism, and in detail the strongest gravity high (at Imperial) coincides with the strongest geochemical anomalies from previous soil and gossan sampling.
These represent immediate exploration targets and initial test work will be conducted to determine the preferred site for deep drilling of anomalies.