| 长江三峡地区地球物理异常带地表地质特征 |
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| 引用本文： | 王清云,李安然,张秋文.长江三峡地区地球物理异常带地表地质特征[J].大地测量与地球动力学,1998(1). |
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| 作者姓名： | 王清云 李安然 张秋文 |
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| 作者单位： | 国家地震局地震研究所 |
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| 摘 要： | 通过长江三峡地区（巴东－宜昌段）水系发育、航卫片判读、野外地质调查等方面的研究，认为沿长江北西西向地球物理异常带在地表没有相应的特殊地质构造显示。中、新生代沉积盖层中未发现规模较大的北西－北西西向断裂通过，地表上这一走向的线性破裂或裂隙密集带及其他相关变形也不甚发育。因此，地下深处与地球物理异常带相对应的基底断裂至少中生代以来没有明显活动。
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| 关 键 词： | 长江三峡地区 地球物理异常带 地表地质 |
SURFACE GEOLOGICAL CHARACTERISTICS OF THE YANGTZE GEOPHYSICAL ABNORMAL BELT IN THE THREE GORGE AREA |
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| Abstract: | According to the researches on drainage system, arial and satellite image, field geological investigation and so on,it is concluded that there is not special geological structure on the surface corresponding to the geophysical abnormal belt with NWW trend along the Yangtze river.Especially,no large-scale fault with NW-NWW trend was found in the depoist cover in Cenozoic ERa and Neozoic Era.The linear fracture and dense crevasse belt and other related deformations on the surface are also rare.So the deep basement faults corresponding to the geophysical abnormal belt were not obviously active at least since Cenozoic and Neozoic Era. |
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| Keywords: | Three-gorge region geophysical abnormal belt surface geology |
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