Regional soil sampling along fence lines defined a 200m wide zone of anomalous Gold (>20ppb Au, up to 362ppb Au) on a single soil line, termed the Roseneath gold prospect. Follow-up geological reconnaissance and rock chip sampling has since defined highly anomalous Gold (up to 3.7g/t Au) in brecciated quartz-limonite (after sulphide) vein float & quartz-limonite stockwork veined, pyritic quartzite outcrops.
The Roseneath gold prospect occurs within the emerging NE-SW trending Fifield Central Gold Corridor which includes the Eclipse, Yoes and Carlisle gold prospects.
Auger geochemical drilling on a 100m x 20m grid was deployed to define the bedrock source of gold rich quartz vein float samples. Auger drilling has been successful in defining several low level Au anomalies >15ppb Au (up to 90ppb Au) spatially associated with anomalous gold (up to 3.7g/t Au) in quartz-limonite veined rock chip samples. The gold in auger anomalies are open in multiple directions, with the largest anomaly >300m long x >40m wide & spatially associated with a quartz-feldspar porphyry sill. This setting is considered potentially similar to Sorpresa. Semi-coincident or offset from the Au in auger geochemical anomalism is As (up to 291ppm As), Pb (up to 290ppm Pb) & Zn (up to 550ppm Zn) fpXRF pathfinder anomalism.
Working exploration models at Roseneath based on the surface geology and geochemistry, include:
Additional infill and extensional auger geochemical drilling is planned to progress the emerging targets to drill ready status.
Geological reconnaissance and auger chip logging has defined a meta-sedimentary sequence, intruded by sub volcanic quartz-feldspar porphyry sills. The meta-sedimentary sequence consists of interbedded meta-siltstone & meta-sandstone, with localised quartzite and carbonaceous siltstone / quartzite horizons.
Gold mineralisation is spatially associated with brecciated quartz-limonite (after sulphide & carbonate) vein float & quartz-limonite (after sulphide & carbonate) stockwork veined, silica-pyrite altered, quartzite horizons.
Significant Au in rock chip results (12 samples >0.1g/t Au) were returned from brecciated, quartz-limonite (after sulphide & carbonate) vein float samples & quartz-limonite stock work veined & sheared, pyritic quartzite sub-crop. Significant Au in rock chip results >1g/t Au include:
Gold has a moderate to strong correlation with arsenic (0.87), silver (0.73) and lead (0.68). Two samples of gossanous (goethite-jarosite ±hematite) breccia float to the NW of the gold anomalism returned anomalous Cu (up to 1,130ppm), As (up to 691ppm), Mo (up to 5ppm) & Zn (up to 632ppm).
A total of 197 auger holes for 566.8m have been completed to date and average hole depth is 2.9m. Multiple low level, Au in auger geochemical anomalies (>15ppb Au, up to 90ppb Au) have been partially defined & are open in multiple directions. Further Auger drilling is being planned to progress the targets to RC drill ready status.
A high resolution (40m spaced E-W lines) aeromagnetic, radiometric & digital terrain model (DTM) survey has been completed which shows gold anomalism occurs within a major NE-SW trending fertile shear zone or fault corridor which forms part of the emerging ‘Fifield Central Gold Corridor’. The newly discovered Carlisle gold prospect (insert click here link to Carlisle) occurs along the same shear zone some 3km to the SW. This 3km long fault zone between Carlisle & Roseneath has not been previously explored. There has been no previous drilling at Roseneath.