引言在美国,对西部的逆掩断层带正加强石油勘探工作。此外,最近在阿巴拉契亚山区南部所作的横剖面也表明蓝岭和山麓带的下面可能有古生代的沉积物。埃尔伍德等人(Ellwood,1980)探讨过这些逆掩断层带下的沉积物内的石油潜力。如果小喜马拉雅带的推覆体下的沉积物未曾变质,它们也可能是油气的一个来源。由于逆掩断层带已成为油气勘探的重要区域,因而就值得去了解它的成熟历史。 INTRODUCTION In the United States, the anti-cover zone to the west is strengthening its oil exploration efforts. In addition, the recent cross-section in the southern Appalachian Mountains also shows that there may be Paleozoic sediments below the Blue Ridge and the foothills. Elwood et al. (Ellwood, 1980) explored the petroleum potential within sediments under the thrust belt. They may also be a source of oil and gas if the deposits beneath the nappe of the Lesser Himalayas have not deteriorated. Since the thrust belt has become an important area for oil and gas exploration, it is worth knowing its mature history.