The Bisha VMS (Volcanogenic Massive Sulphide) District remains under-explored and has vast untapped potential. BMSC has exploration rights on the Bisha and Harena Mining Licenses and the Mogoraib River Exploration License. BMSC continues aggressive exploration to expand existing and find new deposits that have the potential to extend mine life for the Bisha mill.
Exploration targets are presented on figure to the right. Overviews follow of the known mineralization (not in mineral reserve).
Harena VMS (Volcanogenic Massive Sulphide) is situated on the Harena Mining License. Harena is 10 km south of the Bisha Main deposit. Harena was discovered in 2005 following the drilling of a gossan zone associated with felsic volcanic rocks. Harena has existing resources and a small open pit reserve (see Operations for details) which was mined for oxide gold-silver ore in 2012/2013.
In 2014, exploration drilling was renewed at Harena to explain the large alteration signature of the deposit. The drilling was highly successful and generated a series of press releases in 2014. The results are summarized in the latest release from December 2014.
Deposit Configuration - Harena
The Northwest Zone VMS lies within the Bisha mining license. The Northwest Zone is 2 km from the Bisha Main deposit. Bisha views the Northwest Zone as a potential source of supplemental feed for the processing plant at Bisha. The feed would provide additional cash flow as an extension to mine life without significant capital expense.
Geological mapping of the Bisha area in 2002 identified altered felsic volcanic rocks to the northwest of the (future) Bisha Mine with a coincident strong airborne EM response. In the fall of 2003, diamond drilling intersected potentially economic widths of copper, gold and silver massive and stringer sulphide mineralization. Follow up drilling in 2004 - 2006 and 2012 - 2013 identified copper and zinc VMS mineralization over a strike length of 800m that remains open to the northeast, southwest and at depth.
Resources - NW Zone
Hambok VMS is a satellite deposit located 16 km southwest of the Bisha mill on the Mogoraib River Exploration License. Bisha views the Hambok deposit as a potential source of supplemental feed for the processing plant at Bisha. The feed would provide additional cash flow as an extension to mine life without significant capital expenses.
The Hambok massive sulphide body is a steeply east dipping, lenticular body. The massive sulphide body extends for over 1,000 m along strike, approximately 350 m down dip and is up to 75 m thick in the center of the lens. The ore body remains open along strike to north and south and down dip at depth.
Resources - Hambok