By interpreting remote sensing image of Wenchuan earthquake region from Beijing-1 Microsatellite Sensors data
there are a series of NW trending faults which ruptured the belt of Longmen shan faults at a length of 90—110 km
and this phenomenon has been conf irmed partly in f ield. We suggest that Longmen shan faults may show a NS trending faults
the same as Anninghe-Xiaojiang faults before Himalayan orogeny. India began colliding with Eurasia over 50 million years ago
this plate collision makes Tibetan plateau uplift rapidly and elevate the highest mountains in the world and thus attributed the area of the high plateau to eastward-moving along large-scale slip-striking faults
and the mechanically strong lithosphere of the Sichuan Basin obstructs it eastward in Longmen Shan region
thrust and strike slip faulting occur. These faults gradually translate from NNE to NE to NEE from south to north and form the structural pattern which we saw in remote sensing image of Longmen Shan region. If these faults can be validated in the further study in the future
it will provide new ideas to solve many geologic questions
including the reasonable explanations about seismic mechanism of Wenchuan Ms8.0
rupture segmentation of active deformation zones of Longmen Shan fault zones
the transformation of the coseismic displacement that reverse and right-slip components are of comparable magnitude along the southwestern portion of the rupture
but right-slip dominates the northeastern portion of the rupture.
关键词
汶川地震北西向断裂遥感构造判读活动断裂分段
Keywords
Wenchuan earthquakeNW-faultsremote sensing interpretationsegment of active faults