Anglo Australian Resources NL (ASX:AAR) Drilling Extends Bedrock Gold Mineralisation At The Dalray And Rogan Josh Prospects
Perth, April 19, 2010 AEST (ABN Newswire) - Anglo Australian Resources NL (
ASX:AAR) (PINK:AAURF) is pleased to announce the results from its latest RC drilling program of 1,369m at the Feysville Project. Drilling targeted bedrock mineralisation beneath the Rogan Josh supergene deposit and possible extensions to the discovery intersection of 6m @ 9.08g/t Au at the new Dalray prospect.
The Feysville Project, which consists of two mining leases located 16km SSE of Kalgoorlie, is situated in a 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 of St Ives, as well as other deposits such as the 60,000oz Au Hannans South deposit (located 3km north of the Project).
Rogan Josh Deposit
The Rogan Josh deposit is an attractive target with significant supergene and bedrock gold mineralisation already located. It has strong geological affinities to the Hannans South deposit, which is largely a supergene gold deposit occurring within the Hannans South Shear Zone. Previous drilling by Anglo Australian Resources and Western Mining returned intersections such as 8m @ 3.3g/t Au; 2m @ 8.8g/t Au; 4m @ 5.39g/t Au; 3m @ 3.68g/t Au and 2m @ 14.34g/t Au from a sub-horizontal zone of supergene mineralisation. The zone, as defined by the 1g/t Au limit, is more than 700m long and 2-8m thick. The mineralisation occurs about 10 - 30m below the surface.
The previous drilling programs, although directed primarily at the shallow supergene mineralisation, also discovered bedrock gold mineralisation within carbonate-sericite altered quartz feldspar porphyry with intersections of 4m @ 5.42g/t Au and 6m @ 8.24g/t Au on the three southernmost sections tested.
Ten drillholes in the latest program targeted this bedrock mineralisation. Most intersected wide zones (up to 21m) of low grade (0.2-0.5g/t Au) gold mineralisation in sericite- carbonate altered quartz feldspar porphyry. (e.g. 21m @ 0.42g/t Au from FEC771). Narrower higher grade intersections are present in the bedrock (e.g. 2m @ 3.37g/t Au) within the broader low grade zones of mineralisation.
While these holes were primarily designed to test bedrock targets, they also obtained shallow intersections (including 1m @ 5.13g/t Au, 1m @ 3.93 g/t Au and 4m @ 1.47g/t Au) of supergene mineralisation that enhance the open pit potential of the prospect. The supergene mineralisation was extended southwards by 50m with a shallow intersection of 6m @ 2.34g/t Au obtained on the southernmost section drilled. The supergene mineralisation still remains open to the south.
Rogan Josh appears to be similar to the Hannans South deposit where gold grades are enhanced in the weathering profile as a sub-horizontal blanket overlying broad zones of generally low grade mineralisation in the underlying bedrock shear zone.
The Company will, therefore, now focus on the potential to mine the supergene mineralisation in a shallow open pit.
Dalray Deposit
The Dalray deposit is a zone of bedrock mineralisation that occurs beneath transported cover 1.7km to the south of Rogan Josh. It was discovered by the Company in November 2009 when one hole intersected 6m @ 9.08g/t Au. Re-assay of this same intersection by the more reliable screen fire assay method indicates coarse gold is present, with the intersection upgraded to 6m @ 10.03g/t Au (including 2m @ 25.69g/t Au).
The recent drilling program was designed as a limited initial followup of the discovery intersection. The orientation of the mineralisation could not be determined from the single discovery intersection and the six drillholes in the latest program were located as bold stepout holes. Five of the six holes, nevertheless returned intersections of interest (including 6m @ 2.03g/t Au and 2m @ 3.53g/t Au), indicating that the Dalray mineralisation potentially has considerable extent. The current drilling has demonstrated the strike extent of the mineralisation to be at least 100m and the mineralisation remains open to both the north and south.
Further drilling following up these promising initial results is planned.
For the complete Anglo Australian Resources announcement, please click the link below:
http://www.abnnewswire.net/media/en/docs/62654-ASX-AAR-487670.pdf
About Astral Resources NL
Astral Resources NL (ASX:AAR) is a Perth based gold exploration & base metals company listed on the Australian Securities Exchange.
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