东天山博格达裂谷发现大规模层间水力断裂系统

THE DISCOVERY OF LARGE-SCALE INTERLAYERHYDRAULIC FRACTURING SYSTEMS IN BOGEDARIFT, EASTEN TIAN MOUNTAIN

层间水力断裂是沉积盆地深处与大规模流体活动有关的断层，目前的地球物理方法及深源钻探取样已经证实活动水力断裂广布于中、新生代沉积盆地中。已褶皱成山的晚古生代裂谷盆地中发育的大规模层间水压碎屑岩是过去沉积盆地发育过程中大规模流体相带及其水力压裂作用的地质遗迹。研究了水压碎屑岩的地质特征、形成地质条件及构造—流体动力作用成岩模式。认为研究水力断裂对认识上地壳层圈拆离、推覆构造、流体输导、多位成矿、油气运移、慢震活动及常规地震发生等问题有极重要的地质意义。

Interlayer hydraulic fracturing fault, which associated with the fluid activity of wide scope in the depth of sedimentary basins, have been confirmed to develop largely in the Mesozoic and Cenozoic sedimentary basins through the methods of geophysics and drolling sampling. The studies in this paper indicate that largescale interlayer hydrofracturing clastic rocks, which formed in folded Late Paleozoic rift basin, are the geological trace of fluid face zone and its hydrofracturing in the developing process of sedimentary basins. Author studies its geological feature, forming condition and structurefluid dynamics model, and realizes that the studies above have vital important geological significance in the bed seperation of upper crust, nappe, fluid conductivity, polytype mineralization, oilgas movement, slow earthquake and conventional earthquake, etc.