贵州1:20万重力异常分布特征与透露的区域地质构造新信息

Distribution Characteristics of Gravity Anomaly with a Scale of 1 to 200,000 and New Information Exposed on Regional Geologic Structure in Guizhou

根据1:20万区域重力场和布格重力场透露的地球物理信息,结合地表地质情况,在区内划定了32条大断裂,一级4条二级28条,在原1∶50万重力资料的基础上新增了16条,它们大致反映了贵州基底的构造轮廓,可为当地基础性的地质找矿和地质科研服务,提供深部地球物理信息。

There are 32 big faults divided within the area including 4 faults at first grade and 28 at second grade based on the geophysical information unveiled in regional gravity field and Bouguer gravity filed at a scale of 1 to 200, 000, combined with geology at surface, and 16 faults are newly augmented on basis of gravity information by a scale of 1 to 500, 000, which generally delineate the basal structure and may provide service for basic geologic ore prospecting and scientific research and reveal geophysical information in deep ground .