Bisha has untapped district-scale potential to deliver organic growth through the drill bit. Bisha’s district deposits include: Bisha Main, Harena, Northwest Zone, Hambok and Asheli.
Bisha Main makes up the majority of Bisha reserves. In the north end of the current open pit constrained resource the deposit is open, bottoming in high grade primary resource. On strike, the deposit is prospective for both primary and supergene copper mineralization as the deposit trends under a hill next to the pit that has a corresponding geophysical anomaly.
More information is available from Project Description page.
Deposit Configuration - Bisha
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 had a small open pit reserve which was mined for oxide gold-silver ore in 2012/2013.
The mineralization at Harena displays a well-defined base metal and host rock alteration zonation pattern consisting of a sphalerite and pyrite, zinc-rich upper portion and a lower chalcopyrite and pyrite, copper-rich basal section. The copper-rich basal area is focussed along the northeastern edge of the deposit and is commonly underlain by a thick zone of highly altered felsic volcanics indicative of the high temperature focus point of the mineralizing system. The zinc-rich upper portion tends to be displaced to the southwest and has much less alteration associated with the volcanic rocks below it, indicating that it is somewhat distal from the active mineralizing centre.
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.
The favorable horizon north and south remains highly prospective.
Deposit Configuration - Northwest 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.
No further work is planned in 2015 but the Hambok region remains highly prospective.
Deposit Configuration - Hambok
Asheli VMS (Volcanogenic Massive Sulphide) is situated on the Mogoraib River Exploration License 23 km southwest of the Bisha Main deposit and processing plant. The Asheli deposit was discovered by Bisha Mining Share Company (BMSC) in April 2015 (see June 18, 2015 Press Release). The initial focus of exploration was a 700 metre long section of highly sericite and chlorite altered felsic volcanics with associated small, pod-shaped surface gossans within a five kilometre long horizon with similar geology. Limited historical drilling (ASD prefixed holes) had intersected only narrow stringer style mineralization with minor chalcopyrite and sphalerite but no massive sulphides.
Deposit Configuration - Asheli