江汉平原东部构造格架及局部构造展布规律研究
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摘要
充分利用钻井、测井、二维地震等资料,开展地质结构解剖,建立了江汉平原东部地层区域构造格架。工区受南北造山挤压,构造应力由造山带向盆内逐渐减弱,区内整体具有对冲干涉、南北分带、纵向叠置的结构特征。研究区内构造展布复杂而有序,主要表现为空间展布上的分带性及构造变形程度上的分区性:空间展布上可将该工区划分为北部秦岭-大别山推覆构造带、南部江南-雪峰滑脱推覆构造及北东向弧形构造及张性构造带3个构造带;从构造变形程度上可将该区分为强烈拉张改造区、强烈褶皱区和相对稳定区。
Well drilling,well logging and two-dimensional seismic date were fully used to analyze the geologic structures,a structural framework of the east Jianghan plain was established.The studied area was compressed by southern and northern orogenic zone,the tectonic stress was reduced gradually from orogenic zone to the basin.The area had the characters of hedge interference,zoning in north-south,vertically stacked structures.In the studied area,structural distribution is complex and in good order.It mainly presents zonation of spatial distribution and regionalization of tectonic deformation extent,the spatial distribution of the area can be divided to 3 tectonic belts,such as North Qinling Mountains Dabie Mountain nappe structural belt,southern Jiangnan-Xiefeng gliding nappe structure and the northeast arc structure and tensile structure.This area can be divided to 3 ranges from tectonic deformation extent,including strong pull and reconstruction belt,strong fold belt and relatively stable belt.
Well drilling,well logging and two-dimensional seismic date were fully used to analyze the geologic structures,a structural framework of the east Jianghan plain was established.The studied area was compressed by southern and northern orogenic zone,the tectonic stress was reduced gradually from orogenic zone to the basin.The area had the characters of hedge interference,zoning in north-south,vertically stacked structures.In the studied area,structural distribution is complex and in good order.It mainly presents zonation of spatial distribution and regionalization of tectonic deformation extent,the spatial distribution of the area can be divided to 3 tectonic belts,such as North Qinling Mountains Dabie Mountain nappe structural belt,southern Jiangnan-Xiefeng gliding nappe structure and the northeast arc structure and tensile structure.This area can be divided to 3 ranges from tectonic deformation extent,including strong pull and reconstruction belt,strong fold belt and relatively stable belt.
引文
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