Feysville
Anglo Australian Resources N.L. 100%
The Feysville project consists of all mineral rights attached to two mining leases located 16km SSE of Kalgoorlie. The project is situated in the geological / structural corridor, bounded by the Boulder Lefroy Fault, that hosts the world class plus million ounce deposits of Mt Charlotte, Fimiston, New Celebration, Victory-Defiance, Junction, Argo and Revenge / Belleisle. and St Ives as well as other substantial deposits such as Hannans South (located 3km north of the project). The project is strategically located between a number of under utilised gold processing plants, providing low cost development options for any resources discovered at Feysville.
Geology at Feysville is complex with regional mapping identifying a double plunging northwest trending antiformal structure known as the Feysville Dome bounded to the west by the Boulder Lefroy Fault and south by the Feysville Fault. The Feysville fault, located on the southern margin of the tenement is interpreted to represent thrusting of underlying mafic/ultramafic volcanic and intrusive rocks over a younger felsic metasedimentary sequence to the south. The geology is dominated by an ultramafic unit correlatable with the ultramafic horizon that hosts nickel sulphide deposits at Kambalda 30km to the south The sequence has been extensively intruded by intermediate and felsic porphyries.
There a number of historical gold workings on the project and drilling has identified strong alteration associated with primary gold mineralisation. Gold mineralisation is typically located at the sheared contacts of intrusive porphyry units, within pyrite sericite altered porphyries and also associated with chalcopyrite magnetite / epidote altered breccia zones within ultramafic units. Previous exploration by WMC Resources Ltd targeted gold and nickel with initial focus on the ultramafic unit for nickel sulphides, with best results of 2m @ 1%Ni and 4m @ 0.67%Ni. Exploration has consisted of a comprehensive soil survey, ground magnetic surveys, TEM surveys, 264 RAB / Aircore holes, 444 RC holes and 5 diamond holes. The soil survey defined an area of extensive gold anomalism clustered in the SE corner of the tenement package. Follow- up drilling confirmed the gold potential of the area with intersections such as 7m @ 2.47g/t Au at Empire Rose, 10m @ 9.1g/t Au at Ethereal, 8m @ 2.08g/t at Kamperman and 8m @ 3.26g/t Au at Rogan Josh.
A significant under explored gold target was identified at the Rogan Josh Prospect. Previous drilling by Western Mining had identified a gold anomaly with intersections such as 8m @ 3.3g/t Au; 2m @ 8.8g/t Au and 2m @ 4.28g/t Au. This drilling identified sub horizontal supergene plus 1g/t Au anomaly over a strike length of at least 700m with a vertical width of 2-8m. The anomaly is located 30m below the surface. The central part of the anomaly is under drilled and not closed off to the east. The bedrock source of the supergene gold is probably associated with the underlying Hannans South Shear Zone. The bedrock potential on this prospect has not been adequately tested. Rogan Josh has strong geological affinities to the 60,000oz Hannans South deposit which is also a subhorizontal supergene deposit overlying the Hannans South Shear.
In June 2009 Anglo Australian Resources NL completed 13 reverse circulation drill holes (total 1180m) primarily to test the supergene-mineralised zone. Encouraging intersections, including 2m @ 5.43g/t Au, 2m @ 14.34g/t Au, 1m @12.09g/t Au,4m @ 5.42g/t Au and 6m @ 8.24g/t Au, confirmed the supergene-mineralised zone and also discovered high-grade bedrock gold mineralisation within carbonate-sericite altered quartz feldspar porphyry on the three southernmost sections tested. The sheared porphyry is interpreted to occur within the Hannans South Shear Zone. The combination of gold mineralisation, associated hydrothermal alteration, porphyry intrusives and shearing suggests that the southerly extension of the Hannans Shear Zone represents a compelling target for testing.
Exploration testing of the southern extensions of Rogan Josh in September 2009, with air core drilling, had located a 900m zone of supergene gold anomalism (Dalray) in the south east corner of the project, corresponding to projected strike extensions of the Hannans Shear. One RC hole from the current program targeted a bottom of hole anomaly of 1m @1g/t Au associated with vein quartz within the centre of the Dalray anomaly. This hole intersected high grade gold mineralisation 6m @ 9.08g/t Au and 3m @ 3.38g/t Au. The intersections, located 50m below surface, corresponds to sheared and altered quartz feldspar porphyry containing abundant vein quartz. The attitude and orientation of the mineralisation is unknown as this is the first deep hole into the prospect. Follow up drilling is planned for this area. The recent drilling also intersected 4m @ 5.39g/t Au and 3m @ 3.68g/t Au at shallow depths on the eastern edge of the Rogan Josh supergene anomaly, extending the known supergene anomalism to the east as well as providing better continuity of mineralisation between drill sections. This anomaly remains open to the east. The source of the supergene anomaly in the bedrock still remains poorly defined and this represents a significant target for further drilling.
At the Michelangelo Prospect (Anomaly J) two holes tested an interpreted steeply south-dipping conductor. Both intersected a sulphidic silicified black shale unit which correlates well with the interpreted conductor. A copper-rich zone in one hole intersected 8m @ 2.87%Cu, 26.5g/t Ag and 0.31g/t Au. This intersection correlates well significant pyrite chalcopyrite alteration intersected in previous drilling which returned a best intersection of 3m @ 1.83%Cu, 13.4g/t Ag and 0.26g/t Au. Minor copper mineralisation has also been recorded at Ethereal ( up to 0.4%) and Hannans South.
Further work on the gold exploration targets is planned.