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《Geology in China》 2009-03
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A study of seismic reflection profiles and stack velocities in Qiangtang basin,northern Tibet

LU Zhan-wu1, GAO Rui1, LI Qiu-sheng1, KUANG Zhao-yang 1,2, LIU Jin-kai1,2, LI Peng-wu1, GUAN-Ye1, HE Ri-zheng1, WANG Hai-yan1 (1. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China; 2. No. 6 Geophysical Party, East China Petroleum Bureau, Sinopec, Nanjing 210007, Jiangsu China)  
This paper deals with the test conducted along two 2-D seismic reflection profiles in Longweicuo area of north Qiangtang basin, Tibet. Flows and parameters of seismic data acquisition and processing are discussed, and the main characteristics of the two profiles are interpreted tentatively. Some conclusions have been reached: there is a large-sized deep depression on the north wedge of the central uplift in Qiangtang basin; there exist obviously different reflections of structural deformation in different directions, with the basement showing strong reflections and Paleozoic strata displaying weak reflections; there also exist apparent differences between Mesozoic strata and Paleozoic strata. The authors studied stack velocity from data-processing and obtained a result consistent with the stack seismic data. Furthermore, some opinions were put forward on the structural background of a drilling hole arranged near one of the seismic profiles.
【Fund】: 科技部国际合作重点项目(2006DFA21340);; 国土资源部青藏高原油气专项(XQ2004-06);; 地下信息探测技术与仪器教育部重点实验室(中国地质大学 北京)开放课题项目(GDL0603);; 国家深部探专项(Sinoprobe-02)资助
【CateGory Index】: P631.44
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