| StudyofCurieisothermalsurfaceinSichuanBasinandtheseismicareaonitswesternmar┐gin |
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| 引用本文： | 张先,虎喜凤,沈京秀,田长征.StudyofCurieisothermalsurfaceinSichuanBasinandtheseismicareaonitswesternmar┐gin[J].地震学报(英文版),1996,9(1):109-116. |
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| 作者姓名： | 张先 虎喜凤 沈京秀 田长征 |
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| 作者单位： | XIAN ZHANG，XI FENG HU，JING XIU SHEN，CHANG ZHENG TIAN，LI ZHAO，MIN LIU and XIU WEN CHENCenter for Geophysical Prospecting，State Seismological Brueau，Zhengzhou 450003，China |
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| 摘 要： | ＳｔｕｄｙｏｆＣｕｒｉｅｉｓｏｔｈｅｒｍａｌｓｕｒｆａｃｅｉｎＳｉｃｈｕａｎＢａｓｉｎａｎｄｔｈｅｓｅｉｓｍｉｃａｒｅａｏｎｉｔｓｗｅｓｔｅｒｎｍａｒ┐ｇｉｎＸＩＡＮＺＨＡＮＧ（张先），ＸＩ－ＦＥＮＧＨＵ（虎喜凤），ＪＩＮＧ－ＸＩＵＳＨＥＮ（沈京秀...
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| 收稿时间： | 3 November 1994 |
| 修稿时间： | 31 March 1995 |
Study of Curie isothermal surface in Sichuan Basin and the seismic area on its western margin |
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| XIAN ZHANG,XI FENG HU,JING XIU SHEN,CHANG ZHENG TIAN,LI ZHAO,MIN LIU and XIU WEN CHENCenter for Geophysical Prospecting,State Seismological Brueau,Zhengzhou ,China.Study of Curie isothermal surface in Sichuan Basin and the seismic area on its western margin[J].Acta Seismologica Sinica(English Edition),1996,9(1):109-116. |
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| Authors: | XIAN ZHANG XI FENG HU JING XIU SHEN CHANG ZHENG TIAN LI ZHAO MIN LIU and XIU WEN CHENCenter for Geophysical Prospecting State Seismological Brueau Zhengzhou China |
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| Institution: | (1) Research Center of Exploration Geophysics, State Seismological Bureau, 450003 Zhengzhou, China |
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| Abstract: | Using the aeromagnetic data and the method of 3-D magnetic stratum inversion, the data of aeromagnetic anomalies in the investigated region have been processed; and thereby the quantitative buried depth of the Curie isothermal surface in Sichuan Basin and its western marginal area has been obtained. The reliability of the inversion results has been confirmed by the features of regional tectonics, the distribution of geothermal gradient and the results of deep seismic sounding. By analyzing the deep geothermal field, it is concluded that the followings are the environmental conditions for the development and occurrence of earthquakes in the western marginal area of Sichuan Basin: (1) The collision of the Yangtze block with the Sichuan Qinghai block and Kangdian rhombic block has produced strong stress accumulation; and (2) Plastic creep in the middle lower crust owing to the upwelling of mantle flux has provided an adjusting unit for rock rupture and stress release. |
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| Keywords: | aeromagnetic inversion Curie isothermal surface seismogenic |
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