Golden Star Resources Ltd. Prestea gold deposit. Ghana.
Mineralized core intervals from four different Boreholes, from top to bottom, reef style mineralization (fault fill quartz veins) from Borehole GT-280S2 at a depth of 74.7 m. intersecting the West-Reef Structure, Borehole GT-287S1A at a depth of 130.7 m. intersecting the West-Reef Structure as well, Borehole UC30-270S-108 at a depth of 78.0 m intersecting the Main-Reef Structure, and at the bottom, a mineralized volcanic lens interval with visible gold and characterized by stockwork-like smoky quartz veins intersected in the footwall of the Main-Reef Structure by Borehole UC-270S-108 at a depth of 94.8 m.
Main-Reef fault-filled quartz vein and fault intersected by Borehole UC30-270-S102.
Reef style mineralization (fault fill quartz veins) from the Main-Reef fault at Level 17, laminated quartz veins in the footwall of the structure with graphitic fault gauge on the hangingwall side.
Source:
NI 43-101 Technical Report on Resources and Reserves, Golden Star Resources, Bogoso/Prestea Gold Mine, Ghana