Sumatra Copper nearly completes drilling at Tembang project
Friday, February 27 2015 - 06:44 AM WIB
ASX-listed Sumatra Copper & Gold plc said that on-going drilling program at its Tembang gold and silver project in southern Sumatra is underpinning final mine design and grade control and highlighting both resource extension and exploration upside.
The company said in a statement Friday that the 4,000-meter drilling program is 75 percent complete.
Confirmatory drilling for final mine design and grade control is anticipated to further convert Indicated Mineral Resources to Measured Resource status, it added.
The company said there is positive indication of opportunity for extension of resources and exploration upside.
Infill drilling inside both Berenai and Siamang DFS Ore Reserve pits for the purpose of increasing the proportion of Measured Resource, grade control and finalization of mine design at these deposits for production is scheduled to start in the second quarter of 2015, Sumatra Copper said.
The company provided the following details.
Planned infill and extensional drilling has been completed at Berenai, successfully confirming width and grade of Mineral Resources as expected and discovering additional mineralization in the footwall of the Berenai main lode (RRC 1546 intercepted 14 meters at 4.82 g/t Au & 54 g/t Ag from 22 meters). The resource model can now be projected to surface and additional follow-up drilling is underway.
Drilling program completed within the Siamang DFS Ore Reserve pit has confirmed the expected continuity and tenor of mineralization. Resource model update is underway and offers the potential for a revised pit optimization to provide more ounces, than the current DFS pit design.
Extension drilling adjacent to both Nuri and Bujang DFS Ore Reserve pits aimed at adding open pit ounces at these deposits:
Drilling within the current Ore Reserve pit design at Nuri has increased confidence in the resource model in an area that was previously poorly constrained, with an additional hole planned to test for continuity of mineralization further to the south.
Extensional drilling program has been successfully completed at Bujang and demonstrates continuity of high grade mineralization along the Bujang structure at depth. While the mineralization narrows towards surface results justify further drilling at depth to expand resources to allow for potential future underground mining.
Exploration drilling at NW-Plant site, Racambai and Jenih prospects testing near mine exploration targets aimed at adding resources:
Two drill holes at the Jenih prospect, immediately north-northeast of Belinau, for down dip extension of mineralization have been completed and provide indication that intercepts are in the upper levels of an epithermal system. Assays are pending. Following additional interpretation further drilling will be planned for future drill programs.
Racambai prospect, with a target area and geometry attractive due to proximity to the Belinau deposit and along similar structural orientation, still to be drilled to test for increasing grade at depth of known mineralization.
Exploration drilling at NW Plant prospect, west of Buluh complex, has been completed and confirmed target structure of mineralization continuing from surface. However mineralization was weak and no further drilling is planned.
Editing by Reiner Simanjuntak