河北省蔚县煤田构造特征再认识

蔚县矿区是河北省正在开发的第三大矿区,随着矿区整体开发的推进,井下揭露资料的在增多。结合以往报告中矿区的构造规律、构造特征,对矿区构造发育规律有了新的认识。在煤系沉积及以后的燕山和喜山期均有活动,对本区含煤沉积和后期改造均有控制作用。从总的区域构造分布看,含煤盆地沉积主要受北东向反射弧的次一级断裂坳陷所制约,同时也存在着次一级的东西向与北东向复合交汇控制特征。

Recognition of Structural Features in Yuxian Coalfield,Hebei

The Yuxian mining area is the third largest mining area under exploitation in Hebei Province.Along with the en bloc exploitation advancing,data revealed in the underground are increasing.Combined with structural regular patterns,structural features discussed in past geological reports,new understanding on structural evolution pattern is recognized.There were tectonic activities after coal measures deposited and during Yanshanian and Himalayan movements had controlled coal deposits and succeeding reformation.According to tectonic zonation,the coal basin mainly restricted by secondary fault depression of NE reflex arc,meanwhile secondary EW and NE composite convergence existed.