| 长江三峡地区仙女山断裂带构造活动性及其北延问题讨论 |
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| 引用本文： | 王瑞江,谭成轩,盛昌明.长江三峡地区仙女山断裂带构造活动性及其北延问题讨论[J].地球科学,1995,4(6). |
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| 作者姓名： | 王瑞江 谭成轩 盛昌明 |
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| 作者单位： | 地质矿产部科技司，中国地质科学院研究生部，中国地质矿业集团总公司筹备组 |
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| 基金项目： | 国家＂七五＂科技攻关项目 |
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| 摘 要： | 仙女山断裂带于燕山运动早期形成，大体经历了５个活动阶段，第四纪以来，以继承性活动为主，活动时代集中在中、晚更新世，全新世无明显活动迹象，沿断裂带走向，差异应力和变形强度自南向北均呈逐渐减弱规律性变化。作者在大量野外调查和测试分析基础上，认为仙女山断裂带延至荒口一带后消失于嘉陵江灰岩中，没有穿过长江，对长江三峡枢纽工程并不构成威胁。
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| 关 键 词： | 构造活动性，北延问题，应力，应变，磁组构参数，仙女山断裂带。 |
A DISCUSSION OF STRUCTURAL ACTIVITY OF XIANNUSHAN FAULT BELT AND ITS EXTENSION TOWARDS NORTH IN THE THREE GORGES ON THE YANGTZE RIVER |
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| Wang Ruijiang.A DISCUSSION OF STRUCTURAL ACTIVITY OF XIANNUSHAN FAULT BELT AND ITS EXTENSION TOWARDS NORTH IN THE THREE GORGES ON THE YANGTZE RIVER[J].Earth Science-Journal of China University of Geosciences,1995,4(6). |
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| Authors: | Wang Ruijiang |
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| Abstract: | Xiannushan fault belt,which has experienced five active stages,was formed at the early period of Yanshan movement.Form Quaternary Period, it is mainly posthumous activity,and the active periods are at Middle and Late Pleistocene Epoches,and there aren't obviously active signs at Holocene Epoch.Differential stress and deformation intensity both become gradually small and weak along the strike of Xiannushan fracture belt formsouth to north.On the basis of much field investigation and office measurement and analysis,we think that Xiannushan fault belt ,which extends to Huangkou section and disappears in Jialingjiang limestone,doesn't go through the Yang tze River and has no influence upon the Three Gorge Project. |
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| Keywords: | structural activity extension toward north strain magnetic fabric parameter Xiannushan fault belt |
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