The Machta 1 occurrence is located north of Machta Creek and east of Amai Point, at an elevation of approximately 90 metres.

The region is underlain by flows and pyroclastics of the Lower Jurassic Bonanza Group, which are intruded by granitic rocks of the Late Jurassic Island Plutonic Suite. The contacts between the intrusive phases are mostly transitional. Contacts with the volcanics can be sharp fault contacts or transitional zones, up to 130 metres wide. Post-intrusive aplite and lamprophyre dikes cut both granitic and volcanic rocks. Faults, shear zones, veins and dikes follow three main orientations: 010 to 025 degrees and 150 to 170 degrees, both dipping steeply to the east, and 90 to 135 degrees with shallow southerly dips. Chloritic alteration on fault and shear planes is common.

Locally, a feldspar porphyry hosts pyrite, chalcopyrite and malachite as fracture fillings. In 1985, a grab sample (26526) assayed 0.29 gram per tonne gold and 0.56 per cent copper (Assessment Report 14369).

In 1985, Cal-Denver Resources completed a program of heavy mineral, rock and soil sampling on the area. In 1985 and 1986, Cortez Explorations completed programs of geological mapping, geochemical sampling on the area as the Machta Gold claim. In 1987, Thomson Gold Co. Limited explored the area.