河南板内大地构造演化及区域动力学背景分析

Analysis on Intra-plate Tectonic Evolution and Regional Dynamics Background of Henan Province

成煤期前加里东构造运动为晚古生代的成煤奠定了良好的基础。成煤期同沉积构造阶段,盆地基底在持续缓慢沉降的同时,河流搬运碎屑物质充填盆地而接受沉积补偿,基本上是一个补偿型盆地,沉积了石炭、二叠纪煤系;中生代晚三叠世开始到新生代第四纪止,先后经历了印支期、燕山早期、燕山晚期、喜山早期、喜山晚期5次构造运动,决定了剥蚀无煤区和赋煤区分布、不同赋煤块段埋深的差异、煤层赋存状态和产状、煤层塑性流变和煤厚等煤层在三维空间中展布规律。通过对大地构造演化及区域动力学背景分析,为煤田预测和勘查规划提供必要的地质学基础。

Caledonian tectonic movement laid a good foundation for late Paleozoic coal-forming before the coal-forming period. The coalforming period was the same with sedimentary structure. The basin basement made a continuous slow subsidence,meanwhile the rivers carried fragmentary materials to fill the basin and received depositional compensation. So it was a compensation basin essentially,where Carboniferous and Permian coal measures deposited. Five tectonic movements had happened in sequence from late Triassic of Mesozoic to Quaternary of Cenozoic. They are Indosinian,early Yanshanian,late Yanshanian,early Himalayan and late Himalayan movements, which decided the distribution regularity in three dimensional spatial such as the distribution of denuded no-coal zone and coal existence zone, the difference in depth between coal existence areas, occurrence, plastic flow and thickness of coal layer, etc. Analysis on the tectonic evolution and regional dynamics background provides necessary basis in geology for forecast and planning of coal field.