基于重磁-遥感数据的昌都地区煤田构造格局研究

发布时间：2018-06-23 14:35

本文选题：昌都地区 + 遥感解译　；参考：《煤炭科学技术》2017年05期

【摘要】：为了解决昌都地区煤田勘查基础薄弱、地质调查难度大的问题,利用重磁-遥感数据对昌都地区断裂分布及深部结构特征进行研究。重磁异常显示,澜沧江断裂为区域性深大断裂,表现为相对低的长条状重力带,带内-540 mGal,两侧-460 mGal,以区域性的重力梯度带相隔。澜沧江断裂南侧表现出高密度、高磁性的特征;北侧重力场一般为-470~-500 mGal,宽缓平稳,煤系多出露于相对重力高与相对重力低之间的过渡地带。基于OLI和DEM影像处理可知,盆地内断裂以北西-南东向为主,局部发育北东向断裂,断裂密度由南向北逐渐降低。昌都地区煤田构造格局以挤压为特色,煤系变形分区呈平行条带结构,变形强度由南向北递减,煤系主要分布于昌都盆地中段、北端及西北部。
[Abstract]:In order to solve the problem of weak foundation of coalfield exploration and great difficulty in geological survey in Changdu area, the distribution of faults and the characteristics of deep structure in Changdu area were studied by gravity, magnetic and remote sensing data. The gravity and magnetic anomalies show that the Lancang River fault is a regional deep fault, characterized by a relatively low long stripe gravity zone with -540m Galal in the zone and -460mGal2 on both sides, separated by a regional gravity gradient zone. The south side of Lancang River fault shows the characteristics of high density and high magnetism, and the north side gravity field is generally -470- 500mGal. the width is slow and stable, and the coal measures are more exposed in the transition zone between relative gravity high and relative gravity low. On the basis of OLI and Dem image processing, it can be seen that the faults in the basin are mainly from the north to the south to the east, and the fault density decreases gradually from south to north. The structural pattern of coal field in Changdu area is characterized by compression. The deformation zone of coal measure is parallel strip structure, the deformation intensity decreases from south to north, and the coal measure mainly distributes in the middle, north end and northwest of Changdu basin.
【作者单位】：中国矿业大学(北京)地球科学与测绘工程学院;中国煤炭地质总局航测遥感局;青海煤炭地质局;
【基金】：中国地质调查局地质调查资助项目(DD20160187) 中央高校基本科研业务费专项资金资助项目(2010YD11)
【分类号】：P618.11;P631

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