Southern Arc commences drilling of Selodong Cu-Au porphyries
Wednesday, April 11 2007 - 05:00 AM WIB
Several deep drill holes are planned to test lateral and depth extensions of previous Newmont drill intercepts within the Montong Botek and Blongas II porphyries, which are mineralised intermediate intrusions forming part of the Selodong Intrusive Complex, said the company.
The Selodong Intrusive Complex lies at the southeast end of a 13 km long, northwest trending structural corridor of mineralisation and alteration along which also lie the Pelangan Gold Prospect and the Mencanggah Epithermal/Porphyry District both also within SA's Property.
According to the company, Newmont explored the Selodong area during the 1990s completing 7,956 m of diamond drilling within a 2 by 2.5 km area. Thirty-five of 52 drill holes intersected intervals of Cu-Au mineralised diorite-porphyry and volcanics. SA has obtained the drill core and digital database from Newmont and SA geologists have fully utilised these in their drill planning
Montong Botek and Blongas II are regarded as the best porphyry targets at this point and will be the focus of the initial drilling program. At Montong Botek 8 out of 13 drill holes were stopped in Cu-Au mineralisation (due to drilling limitations) and several intersected long intervals of significant Cu-Au grades.
Based on interpretation of geology and alteration mineralogies, the Montong Botek and Blongas II porphyries would appear to have suffered little erosion, hence there is good potential for preservation of the full mineralised system at depth.
Three other areas hosting porphyry style mineralisation (Blongas I, Kekalik, and Belikat) were also identified.
SA geologists have recently located three new areas hosting porphyry style mineralisation with supporting geochemical, alteration and ground geophysical anomalies within the western and northern parts of the prospect, and at least 7 other coincident geophysical/geochemical anomalies are currently being followed up within the Selodong Complex.
The Selodong Intrusive Complex possesses significant potential to host more porphyries and will be a major focus of exploration for the future, it said. (alex).