Arc Exploration obtains encouraging results from Trenggalek benching program
Wednesday, February 26 2014 - 01:08 AM WIB
ASX-listed gold miner Arc Exploration Limited reported Wednesday encouraging rock chip results obtained from initial benching conducted on the Singgahan Prospect located in the south-eastern corner of the Trenggalek Exploration IUP in East Java.
?Contour benching is still in progress along ridgelines hosting a 500-m wide by 1,000-m long coincident gold- copper-molybdenum soil anomaly that was reported last month,? the company said in a statement.
The first bench, SGB01, was completed for a total length of 530 meters. Results from continuous-chip sampling have been received and these show long intercepts of anomalous gold-copper-molybdenum geochemistry returned in a weathered, hydrothermally altered diorite intrusion containing diffuse limonitic quartz stockwork.
Relict exposures of fresh rock show chlorite-magnetite-feldspar alteration locally overprinted by silica-clay/mica- pyrite alteration, and disseminated pyrite-chalcopyrite-magnetite mineralization in the quartz stockwork.
Jeffrey Malaihollo, ARX's Managing Director and CEO, commented: "The first assay results from continuous-chip samples of a bench designed to investigate the source of a coincident gold-copper-molybdenum soil anomaly reported from Singgahan Prospect last month were received. The results highlight a broad zone of anomalous gold-copper-molybdenum geochemistry in the weathered bedrock. This geochemical signature is encouraging and may indicate the presence of a porphyry system at depth.?
Furthermore, mapping of the bench and in the surrounding areas has identified outcrops of an altered diorite intrusion with remnants of quartz stockwork containing disseminated magnetite, pyrite and chalcopyrite mineralization, typical of porphyry copper-style systems, he added.
?Additional benching is in progress. The results of this program will be integrated with geological and geophysical data to plan a scout drilling program," he said
A program of grid-based soil sampling covering the south-eastern corner of the Trenggalek IUP, including Singgahan, and geological mapping are also in progress to identify new targets. This work is estimated to be completed in about six weeks.
ARX has a joint venture with PT. Sumber Mineral Nusantara (SMN), an Indonesian company which holds the Trenggalek Exploration IUP tenement that covers an area of approximately 300 km2 in the Southern Mountains of East Java.
SINGGAHAN - Anomalous Bench Intercepts
| Bench ID | Length (m) | Gold (g/t) |
Copper (ppm) |
Molybdenum (ppm) |
Comment Max. individual results |
| SGB01 | 140 | 0.045 | 386 | 4 | 0.144 g/t Au, 711ppm Cu, 16ppm Mo |
| 100 | 0.063 | 276 | 5 | 0.172 g/t Au, 677ppm Cu, 16ppm Mo | |
| 48 | 0.052 | 314 | 3 | 0.089 g/t Au, 627ppm Cu, 6ppm Mo | |
| 14 | 0.104 | 416 | 3 | 0.122 g/t Au, 450ppm Cu, 8ppm Mo | |
| 8 | 0.078 | 389 | 8 | 0.093 g/t Au, 428ppm Cu, 5ppm Mo |
Editing by Reiner Simanjuntak