研究鄂西南清江流域的新构造运动──利用第四纪沉积物的磁化率各向异性特征  

THE STUDY OF THE NEW TECTONICS IN VALLEY OF THE QINGJIANG RIVER WITH THE ANISOTROPY OF MAGNETIC SUSCEPTIBILITY OF THE QUATERNARY

作　　者：阎桂林[1] 

机构地区：[1]中国地质大学应用地球物理系

出　　处：《地球物理学报》1994年第A02期324-333,共10页Chinese Journal of Geophysics

摘　　要：本文介绍了利用第四纪沉积物的磁化率各向异性特征来研究区域新构造运动的原理和方法．研究区地处鄂西南的清江流域，在清江流域共布采点３０个，采集定向作品３３０个．数据统计结果表明，该区存在不均衡的升降运动，特别是清江下游地段，在Ｑ２之后地壳产生掀斜，其产状为倾向ＮＥ４１°，倾角３０°左右．还反映出该地段与其中、上游地区有垂向及水平方向上构造应力场的不均衡．The paper presents the principle and method to study area new tectonic with rock magnetism-the anisotropy of magnetic susceptibility of quaternary sediment.The research area is in the valley of the Qingjiang river which is in southwestern.Hubei province.Amount of sample site is 30 (there are 330 directional specimens) in the upper-middle and lower reaches of the liver. The measurement of the specimens shows that the crustal tile with 41°NE<30° in the lower reache took place ofter Q2.Between the lower teache and upper-middle one, there is not in balance in the vertical and horizontal tectonic stress field.

关 键 词：各向异性 磁化率 湖北 新构造运动 沉积物 

分 类 号：P546[天文地球—构造地质学]