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沿新疆可可托海—二台断层采集了断层泥,分析了断层中碎屑和粘土含量的比例。在100—300Mpa围压下测定了断层泥的力学性质,并就它们与断层粘土含量和水含量的关系进行了讨论。 1931年在新疆可可托海—二台断层中部不连续段卡拉先格尔发生了8级强震,沿断层发生了十几米的右旋水平错动。由于新疆气候干旱,人烟稀少,使这个五十多年前发生的地震遗迹得以保存。在新疆地震局的协助下,1984年部分作者沿这条长达200公里的地震断层进行了野外考查,并在一些部位采集了断层泥样品。本文着重提供断层泥的性质以及不同围压下的强度。由于断层泥是断层活动的产物,但又影响断层带的力学性质,故可在分析地震发生条件时参考。
The fault mud was collected along the Koktohai-Ertai fault in Xinjiang and the proportion of debris and clay in the fault was analyzed. The mechanical properties of fault mud were measured at confining pressure of 100-300Mpa and the relationship between them and the content of fault clay and water content was discussed. In 1931, a magnitude 8 strong earthquake occurred in the discontinuous section of the Central Keketuohai-Ertao fault in Karatsengar, Xinjiang, and a dextral displacement of more than ten meters occurred along the fault. Due to the arid climate and the sparsely populated area in Xinjiang, the earthquake that occurred over 50 years ago was preserved. With the assistance of the Xinjiang Seismological Bureau, some authors carried out field tests along the 200-km seismic fault in 1984 and collected fault mud samples in some areas. This article focuses on the nature of fault mud and the strength under different confining pressures. Because the fault mud is the product of fault activity, but it also affects the mechanical properties of the fault zone, it can be referenced when analyzing the conditions of earthquake occurrence.