The matched-filter analysis of Bouguer gravity anomaly in Qinghai-Tibet Plateau and its tectonic implications

Abstract：Bouguer gravity anomaly data from Qinghai-Tibet plateau were processed by the match-filter method. According to he first order vertical derivative radial average logarithmic energy spectrum curves, the Bouguer gravity anomaly in Qinghai-Tibet Plateau can be divided into three layers．The Longmuco-Shuanghu tectonic zone is always discerned in the middle and deep gravity anomaly field, whereas the Geji-Gaze-Cuoqen-Shenza concealed fault is always existent in the shallow and middle gravity anomaly field. There is a huge and smooth low gravity anomaly contour line encirclement in Qiangtang terrane of northern Tibet，and there exist a series of WE-trending gravity anomaly blocks in southern Tibet.