数字地质调查中多源地学数据在造山带构造单元划分和大地构造演化研究方面的应用--以青海民和地区为例  

Application of multi-source geological data in the division into tectonic units of the orogenic belt and tectonic evolution in digital geological survey——A case study of the Minhe area,Qinghai,China

作　　者：朱云海[1] 李超岭[2] 孙赜[3] 于庆文[4] 张克信[1] 张智勇[2] 

机构地区：[1]中国地质大学武汉地球科学学院,湖北武汉430074 [2]中国地质调查局发展研究中心,北京100037 [3]吉林师范大学旅游与地理学院,吉林四平136000 [4]中国地质调查局,北京100037

出　　处：《地质通报》2008年第7期974-979,共6页Geological Bulletin of China

基　　金：中国地质调查局项目《1∶25万临夏市幅、定西市幅区域地质调查》(编号:200413000007);《1∶5万奴家合幅、校都乡幅区域地质调查》(编号:1212010610316);高等学校全国优秀博士学位论文作者专项资金项目(编号:200228)资助

摘　　要：多源地学数据包括遥感、地球化学和地球物理数据,介绍了利用多源地学数据进行造山带构造单元划分的方法。遥感数据在确定区域构造边界及活动断层方面的应用非常广泛,遥感影像在解译线形构造即断层方面有非常明显的效果,可以根据不同构造单元的影像差异,区分不同的地质体、线性构造及活动断层,同时用遥感数据叠加三维地形数据分析线性构造可以更加直观地解译线性构造。地球化学数据在确定大的构造边界方面具有一定的指示意义,可以根据水系沉积物的地球化学特点,运用因子分析方法确定大的构造边界。地球物理数据提供的是地质体及构造边界在深部的延伸情况,可以为研究断裂的运动学和动力学特征提供证据。Multi-source geological data include remote sensing, geochemical and geophysical data. The paper introduces the method of distinguishing tectonic units in orogenic belts using the multi-source geological data. Remote sensing data are widely used in determining regional tectonic boundaries and active faults and remote sensing images have very notable effects in explaining liner structure, i.e. faults. We can distinguish different geologic bodies, liner structures and active faults according to the image difference among different tectonic units, and furthermore, we can more visually explain linear structure by using remote sensing data superposed by DEM. Geochemical data has some significance in determining large tectonic boundaries. According to the geochemical characteristics of stream sediments, we can use the factor analysis to determine large tectonic boundaries. Geophysical data offer the information of deep extensions of geologic bodies and tectonic boundaries, and can provide evidence for the study of the kinematic and dynamic characteristics of faults.

关 键 词：多源数据 数字地质调查 构造单元划分 大地构造演化 青海民和地区 

分 类 号：P623.1[天文地球—地质矿产勘探]