Drilling has started at Southern Arc’s Sabalong project on Sumbawa Island. The company recently completed a detailed ground magnetic survey covering 15sqkm of the property to identify potential porphyry targets.
Magnetic anomalies identified on the western and southern margins of the Lito lithgocap were also covered by a deep-penetrating induced polarization (IP) survey. Inversion modeling and 3D visualization of this data revealed a 1.5 x 1.3km chargeable zone possibly related to buried sulphides. Southern Arc and its joint venture partner and subsidiary, Vale SA, plan to drill this target with a series of deep holes to test whether a mineralized porphyry system is present.
The Sabalong project covers 9950 hectares in the Miocene volcanic belt of the Sunda-Banda Arc, in the Nusa Tengarra Barat province about 22km south-southeast of the administrative city Sumbawa Besar. It is 30km north-northeast of Newmont’s Elang copper-gold porphyry deposit and 75km northeast of Newmont’s Batu Hijau copper-gold mine. It was previously owned by Newmont and Rio Tinto Zinc whose exploration and reconnaissance sampling confirmed gold-silver anomalous areas and base metal mineralization in the east.
Southern Arc acquired Sabalong in April 2007 and then entered into a joint venture with the world’s second largest metals and mining company, Vale SA. Vale will fully fund the advancement of Sabalong through to and including the completion of a bankable feasibility study.
The Canadian mineral exploration company has a portfolio of four projects with epithermal gold and gold-copper porphyry prospects on Indonesia’s Lombok and Sumbawa Islands.