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《Seismology and Geology》 2003-04
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SEISMOGEOLOGIC BACKGROUND OF THE CHENGDU PLAIN AS REVEALED BY SEISMIC PROSPECTING DATA OF PETROLEUM

HUANG Sheng mu 1) HE Tian hua 2) FAN Ming xiang 3) LI Jia pen 4) XIE Xiong fei 4) FANG He di 5) WU Zhi shen 6) 1) Seismological Bureau of Sichuan Province, Chengdu 610041, China 2) Geological Prospecting and Developing Institute of Sichuan Petroleum Administration Bureau, Chengdu 610081, China 3) Chengdu Geophysical Prospecting Institute of Geological Survey Office, Sichuan Petroleum Administration Bureau, Chengdu 610212, China 4) Second Geophysical Prospecting Institute of Southwestern Petroleum Administration Bureau, Xinxing Petroleum Company of Sino Petroleum & Chemical Group, Deyang 618000, China 5) Seismological Bureau of Chengdu City, Chengdu 610015, China 6) Seismological Bureau of Deyang City, Deyang 618000, China  
This paper presents the identification and delineation of buried faults in Chengdu and Deyang depression, based on seismogeologic and petroleum prospecting data accumulated in the past 20 years by Seismological Bureau and Petroleum Administration Bureau of Sichuan Province. A very important question about whether a potential or buried fault exists in Chengdu and Deyang depression basin is answered. Seismo geological data show that a fault starting from Xinjin and terminating to the south of Pengzhen, Shuangliu County does exist in the region. Furthermore, the relationships between active faults and seismic activities, as well as the related characteristics of the faults are discussed. At the same time, a strict distinction between the shallow faults and deep buried faults is made, and then their distributions are delineated. Five new types of seismogenic faults are proposed. Based on the above mentioned recognition, the potential areas of strong earthquakes in Chengdu basin are determined. The results show that the Chengdu Deyang area of hundred kilometers in length and 40km in width possesses stable seismo geologic environment and good conditions for earthquake engineering. This conclusion is of great importance to the economic developments and constructions, and especially to the assessment of seismic risk of major engineering sites in Chengdu basin.
【Fund】: 国家重点基础研究发展规划项目 (95 130 5 0 5 )资助
【CateGory Index】: P315.9
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