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河南熊耳山地区的滑脱拆离带由浅部到深部为一脆性—脆韧性—韧性的断裂带.浅部盖层由于未遭受高温热液变质作用,所受围压和孔隙压力较小,表现为脆性变形;深部基底遭受了强烈的高温热液变质作用,岩石中赋存汽水流体较多,所受围压也较大,表现为韧性变形;而位于盖层与基底之间的拆离断层则由于高孔隙压力作用降低了部分围压效应,使之位于盖层与基底之间的拆离断层产生了脆韧性变形.这样在不同围压、流体、孔隙压力和高温热液变质作用等因素及构造应力的共同作用下,实现了本地区滑脱拆离带的脆韧性转换
The detachment belt in the Xiong’ershan area of Henan Province is a brittle-brittle-ductile-to-ductile fault zone from shallow to deep. As the shallow caprocks did not suffer from high-temperature hydrothermal metamorphism, the confining pressure and pore pressure were small, which showed brittle deformation. The deep base suffered intense pyrochemistry, and there were many soft and liquid fluids in the rock. The confining pressure is also larger, showing the ductile deformation; and detachment fault located between the cover and the substrate due to the effect of high pore pressure to reduce part of the confining pressure effect, so that the cover layer and the substrate detachment fault Have a brittle and ductile deformation. In this way, with the combination of confining pressure, fluid, pore pressure and high-temperature hydrothermal metamorphism and tectonic stress, the brittle-ductile transition of the detachment belt in this area is realized