解决西藏羌塘地区重力异常与高程相关问题的尝试

THE ELIMINATION OF FALSE ANOMALIES RESULTING FROM CORRELATION BETWEEN BOUGUER ANOMALIES AND TOPOGRAPHY IN QIANGTANG,TIBET

针对西藏羌塘地区造成布格重力异常与地形起伏相关的原因 ,从理论上进行了分析探讨。从实际出发 ,提出了用区域性调整中间层密度以及用相对高差进行高度和中间层校正的方法来消除和压制这种山形异常 ,并做了实际资料处理 。

In highland areas,Bouguer anomalies observed on the undulating ground often take the shape related to the topographic relief.This leads to misunderstanding and renders the interpretation of the gravity anomalies difficult.In this paper,the author describes the causes of this trouble in Qiangtang,Tibet,and presents an effective approach to remove the false anomalies,which involves doing bouguer correction with relative height instead of absolute elevation and adjusting the density of the correction by making correlation analysis for the anomalies and elevations.