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《Journal of Jilin University(Earth Science Edition)》 2006-01
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Density Sructure of Crust and Mantle Beneath Duoma-Deqing-Dazi Profile

ZHENG Hong-wei, HE Ri-zheng Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037,China  
On the basis of some existing studies, the authors study the transverse density structure of the crust and mantle beneath the Duoma-Deqing-Dazi profile using gravity-seismic integrated inversion method. The modeling results state that some low-density layers exist beneath most parts of profile. Two deep normal faults exist on both sides of the Nyainqentanghla Mountain and cut off the low-density layer. The low-density layer beneath Nyainqentanghla Mountain was uplifted from 5 to 10 km higher than others. Thus, the density structure beneath Nyainqentanghla Mountain like a horst. From the mountain to Duoma, the depth of Moho is basically even, but from the mountains to Dazi, namely from west to east, Moho beneath the profile is deeper and deeper. By contrast with the depth of Moho, the top of Asthenosphere beneath Nyainqentanghla is protuberant, like a anticline.
【Fund】: 国家自然科学基金项目(40404011)
【CateGory Index】: P631.4
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