豫东平原区的地球物理特征及找煤远景

豫东平原区勘探手段多样，地质资料丰富，通过对豫东平原区重力场、磁力场、地震反射波等地球物理特征综合分析，并进行联合反演及钻探资料对比一区域地质研究和综合地质解释的成果表明，该区构造型式多样．挤压式、伸展式、走滑式均有表现，但以伸展式断裂为主；构造线可见三组发育方向，近EW向构造形成最早，NNE-NE向构造形成最晚，而NW向构造则介于二者之间，且具有左行平移走滑性质；该区总体恪局为“两坳夹一隆”，即开封坳陷、周口坳陷、通许隆起，其煤炭资源丰富，埋藏深度变化较大；隆、坳中发育很多结构不同的次级凸起和凹陷，正确认识这些隆、坳中的次级构造单元及结构，是预测找矿的关键。

Geophysical Characters,Comprehensive Geological Explanation and Coal-looking Prospect of East Henan Plain

It is an advance in modern geology to study an area by many kinds of prospecting methods. Based on the comprehensive analysis of all kinds of geophysical data, the characteristics of geophysical fields are expounded about east Henan plain, including gravity field, magnetic field and seismic reflective waves, et al. By united inverse gravity, magnetic and seismic explanation combined with drilling data, it is carried out that the regional geological research and comprehensive geological explanation, and the coal-looking hopeful target is pointed out last. The results illustrate that the structural forms of east Henan plain are such manifold as compression, stretching and strike slip, but mostly stretching fault. The tectonic lines reveal three directions as near-EW early, NNE-NE late and NW between them; Furthermore, the NW faults have the property of left-lateral sense strike-slip. The general structural framework of east Henan plain is one uplift between two depressions, i.e. Kaifeng depression, Zhoukou depression and Tongxu uplift. In which with plenty of coal resources but with a large change of buried depths. The uplift and two depressions develop many second-order upheavals and downwarpings of different textures. It is the key to look and forecast resources that the secondary structural units and their textures are recognized correctly.