Abstract:

A lenticular sandstone with carbonized asphalt up to 8-15% is discoveredin the lowest part of the Upper Proterozoic Xiamaling Formation in Longtan-gou,Lingyuan County, west Liaoning. The authors consider that there was anoil pool in the Proterozoic which was then destroyed by the intrusive gabbro-diabase of 7.6340?0.0861 million years dated by K-Ar isotopic method, Inthe places where magmatism was weak, it is possible to find oil pools in the Proterozoic.