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Old Crow Basin

| Liard Basin | Kandik Basin | Bonnet Plume Basin | Old Crow Basin | Whitehorse Trough | Peel Plateau and Plain | Eagle Plain Basin | Beaufort-Mackenzie Basin |

In northwestern Yukon, the Old Crow basin is a Cenozoic intermontane basin within the Northern Yukon Fold Complex. It is flanked by intensely deformed and uplifted Proterozoic to Mesozoic sedimentary rocks of the British Mountains, Richardson Mountains, Old Crow Range and Keele Range.

The basin consists of essentially flat-lying Cenozoic to Recent, non-marine sediments containing minor coals unconformably overlying a Proterozoic to Mesozoic basement with a suggested relief of up to 800 m. The basement relief is caused by either east-trending marginal faults or syncline-anticline fold structures. Mesozoic strata are thought to be imperfectly preserved beneath this Eocene unconformity with their erosion occurring over the structural highs. Paleozoic strata consist of miogeoclinal marine shales and platform carbonates laterally correlative to those of the Western Canada Sedimentary Basin.

Rocks in the region have been deformed by two major orogenic episodes: and Early Devonian Ellesmerian compressional orogeny and the latest Cretaceous to Cenozoic Cordilleran compressional orogeny.

Six conceptual and speculative gas plays have been identified within the basin. The greatest gas potential occurs in the Upper Paleozoic carbonate play. There is considered to be little, if any, oil potential in the area.

Petroleum exploration in the basin has been quite limited. Reconnaissance seismic was shot between 1969 and 1972. An extensive gravity survey was completed by Gulf Oil Canada Ltd. in 1973. No wells have been drilled. Areas within Vuntut National park and the Old Crow Flats Special Management area are withdrawn from exploration and development.