论文部分内容阅读
本文对青藏高原东北缘一些主要断裂（包括阿尔金、昌马、毛毛山等断裂）的断层泥首次进行了研究。在对断裂带的内部结构、围岩成分、断层泥的厚度及石英颗粒表面特征等综合分析的基础上对断裂的活动年代、活动方式及断层泥形成的深度进行了讨论。石英颗粒表面上溶蚀程度（颗粒表面的光滑程度、凹凸现象及孔洞发育情况）可划分为６种类型并且每种类型都有相应的年代。根据断裂的粘滑、蠕滑特征，对该区的各活动断裂进行了粘滑段与蠕滑段的划分。用红外光谱与稀土元素的分析结果，算得断层泥形成的深度在地壳１０ｋｍ范围内。
In this paper, the fault mud of some major faults in the northeastern margin of the Qinghai-Tibet Plateau (including the faults of Altyn Tagh, Changma and Mao-Mao) was studied for the first time. Based on the comprehensive analysis of the internal structure of the fault zone, the composition of the surrounding rock, the thickness of the fault mud and the surface features of the quartz particles, the active age of the fault, the activity mode and the depth of fault mud formation are discussed. The degree of dissolution on the surface of quartz grains (the smoothness of the grain surface, asperities, and pore development) can be divided into six types and each type has a corresponding age. According to the characteristics of stick-slip and creep of the fracture, the division of stick-slip segment and creep-slip segment has been carried out for each active fault in this area. Using infrared spectroscopy and rare earth element analysis results, calculate the depth of fault mud formation in the crust 10km range.