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松潘-邵阳大地电磁剖面深、浅部典型构造的解释
作者姓名:王运生  王绪本  苟量  贾进斗
作者单位:1. 成都理工大学地质灾害防治与地质环境保护国家专业实验室,成都,610059
2. 成都理工大学信息工程学院,成都,610059
3. 中国石油地球物理勘探局,河北,涿州,072751
摘    要:通过对松潘—邵阳大剖面大地电磁原始资料的采集、分析、MT二维反演成图,进而对大剖面MT反演图进行综合地质解释,解释成果客观的反映了剖面区带深,浅部构造的展布规律并取得了如下几个方面的认识:(1)确定了龙门山推覆构造主滑脱面为埋深为20km的壳内低阻层;(2)查清了华蓥山构造带深,浅部断裂展布特征;(3)系统揭示了剖面区带隐伏断裂的发育情况;(4)对剖面区带的断裂活动性进行了分级;(5)揭示了川东—鄂西—湘中地区深、浅部褶皱构造的展布。

关 键 词:大地电磁(MT)  综合地质解释  深浅部构造  松潘-邵阳大剖面
文章编号:1672-1683(2007)02-0070-02
修稿时间:2006-11-23

Several Progress of Deep-shallow Structure Interpretation by MT along Songpan-Shaoyang Cross Section
Authors:WANG Yun-sheng  WANG Xu-ben  GOU Liang  JIA Jin-dou
Affiliation:1. The national lab. Of Geological hazards and envrionment preotection ; 2. Information engineering, Chengdu University of Technology, Chengdu 610059, China ; 3. Bureau of Oil Geophysics Prospecting, Zhuozhou 072751, China
Abstract:Based on the collection, analyses of the MT original data and 2D-MT inversion of Songpan-Shaoyang cross section, we have made the comprehensive geological interpretation of the cross section. The results of the research objectively present the distribution of the strata and geological structures in the deep. Several results are as follows: (1)the low resistivity layer between the upper crust and the lower crust (20km below the surface) was found, and it composed of the main part of the Longmenshan nappes. (2) the distribution of the faults have been identified in Huayingshan structure belt. (3) the blind structures have been identified. (4) the classification of fault activites have been studied. (5) the deep distribution of the complex fold structures in eastern Sichuan-western Hubei-central Hunan has been identified as well.
Keywords:MT  comprehensive geological interpretation  the deep-shallow structures  Songpan-Shaoyang cross section
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