Oligocene(?) equigranular, fine to medium-grained diorite intrudes a sequence of Paleozoic or Lower Mesozoic limestones and argillite. The diorite is foliated near the Gold Cord vein, with foliation paralleling the vein. East trending faults are common. Basic dykes cut both intrusives and sediments. The Gold Cord vein follows the footwall of a shear zone in the diorite, and strikes about 115 degrees and dips 30 to 80 degrees north. It has been traced on surface for over 470 metres. The vein consists of white quartz sparsely mineralized with free gold, pyrite, local chalco- pyrite and trace sphalerite. On surface the vein ranges from 0.1 to 0.75 metres wide; underground it splits into two or three distinct 30 to 120 centimetre veins. A chip sample across 0.6 metres with visible gold assayed 72 grams per tonne gold, 190.0 grams per tonne silver, and 2.13 per cent copper.