京西煤田马兰薄皮式推覆构造

马兰薄皮式推覆构造由F₀₉、F₀₁分别构成顶、底部推覆构造的边界断层及主滑面,其间包容着14个断片,向下消失于基底滑脱面之上,构成典型的侏罗山式薄皮构造。外来岩体由北西向南东推覆滑动,滑移距离在7km以上,地层长度缩短5倍左右,地层厚度增加3倍。推覆构造产生于J₃t之后,K₁d之前,系燕山运动中晚期,向下切割及叠加在早期F₁滑覆构造系统之上。构造发育规律对找煤勘探具有重要的指导意义。 

THE THIN SKIN TYPE NAPPE STRUCTURES IN MALAN, WESTERN BEIJING COAL FIELD

The thin skin type nappe structures in Malan are composed of F 09 and F 01 faults,which form the boundary faults and main slip plane of top and bottom nappes respectively,including fourteen fault chip sheets between them.They were disappeared downward on the sliding plane of basement,forming the typical Jura Mountain type thin skin structure.The exotic block got nappe and slip from northwest to southeast,with the sliding distance over 7 km,the length of strata shortened about 5 times and the thickness of strata increased 3 times.The nappe structures,which generated in the middle late period of Yanshan movement between J 3t and K 1d,cut down and superimposed on the slide stacking structure system created in the early F 1.The regularities of structural development have important significance for the coal exploration.