Near vertical deep seismic reflection profile reveal the sketch of Qinling Mountains orogenic belt-Weihe garben-Ordos block's Moho by big charge shots
Li Hongqiang, Gao Rui, Wang Haiyan, Li Wenhui, Lu Zhanwu, Hou Hesheng, Xiong Xiaosong
State Key Laboratory of Continental Tectonics and Dynamics;Institute of Geology, Chinese Academy of Geological Sciences;Key Laboratory of Earth Probe and Geodynamics, Ministry of Land and Resources of the People's Republic of China, Beijing 100037
Ten large charge shots datas of northern Qinling-Weihe garben-southern Ordos were processed by near vertical incidence principle. We obtained a single fold section which can reveal the deep structure of this region. The section shows that the nothern Qinling orogenic belt's Moho reflection apears at 13 s(TWT)and ascend gradually from south to north. While getting into Weihe garben, the Moho reflection is deepened sharpely, and the pattern of Moho reflection looks like arc. The preliminary results shows the converge between the Oinling and Weihe garben. At the northermost of deep seismic refletion profile, the Moho reflection appears at 14 s and is deepened gradually from north to south. The Moho can not continuous tracking and Moho on both sides have different refective characterstic at 130~140 km. It likely represents the boundary between the Weihe graben and Ordos block.
. Near vertical deep seismic reflection profile reveal the sketch of Qinling Mountains orogenic belt-Weihe garben-Ordos block's Moho by big charge shots[J]. Chinese Journal of Geology, 2016, 51(1): 67-75.