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引言 在美国西南部盆地—山脉省(盆—岭区),已知许多第三纪滑脱断层(detachmentfault)属于位移很大的低角度正断层,后经上升、倾滑和变形,呈宽缓的起伏面出露于地表。原在深处且处于高温条件下的下盘岩层,经滑脱断层作用移去上覆岩层,发生均衡上升,并穿过一系列温度递次降低的等温面。由于上盘岩层遭受强烈引张,发生侧向位移,使之形成许多上盘断层带,成为热液流体循环的通道。
INTRODUCTION In the basin-range province (basin-ridge region) in the southwestern United States, it is known that many detachment faults belong to highly displaced low-angle normal faults that rise, dip and deform, Undulating surface exposed to the surface. The original deep under high temperature conditions, the lower plate rock strata, by the slip fault removed the overlying strata, a balanced rise, and through a series of decreasing temperature isothermal surface. Due to the strong extension of the overburden strata, lateral displacement occurs, forming many upper fault zones and becoming channels for hydrothermal fluid circulation.