Yukon Geological Survey publication metadata (English, HTML)

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Publisher-reported update

2026-09-09

Clinton Creek asbestos deposit is situated at 77 km northwest of Dawson City on Clinton Creek in Yukon. Yukon Metamorphic Complex of Ordovician to Devonian age covers most of the Clinton Creek area. The most prominent metamorphism of the area occurred in Permian time. Based on intensity and style of deformation of ultramafic bodies and country rocks it is suggested that the ultramafic rocks were emplaced probably during the Permian period. Tintina fault is a weak zone along which the alpine ultramafic bodies of Clinton Creek and probably some of the others along and close to the Tintina Trench were tectonically emplaced. These were later folded and metamorphosed with the country rocks. During latest Cretaceous-earliest Tertiary time the area was intruded by acid intrusive rocks. The youngest undeformed and fresh basalt is probably of Selkirk volcanics equivalent. Three prominent phases of deformation were delineated. Probably the oldest and most complex phase occurred during the Permian, along with the initial movement of the Tintina fault. Small, tight, isoclinal folds are characteristics of this phase. The structural trend is roughly parallel to the direction of the Tintina…

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