The fault clay of some principal faults,including Altun,Changrna and Maornaoshan faults,along the northeastern border of Qinghai-Xizang Plateau is first studied. On the basis of the comprehensive analyses of the inner structures, country rock composition,fault clay thickness and quartz grain surface features within a fault zone,the fault activity ages and ways as well as the depth of fault gouges are discussed. The surface corrosion degrees of quartz grains can be classified into six types and each type has a corresponding age. The division standards of fault activity natures are proposed,by which the stick-slip and creep slip parts of a fault zone can be divided. Through the infrared spectroscopic analysis and rare earth element analysis, it is considered that the fault gouge formed at about 10 km depth within the crust.
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吕德徽,向光中,郭万武,陈文彬.青藏高原东北缘断层泥的研究[J].地震工程学报,1996,18(2):69-95. Lu Dehui, Xiang Guangzhong, Guo Wanwu, Chen Wenbin. STUDIES ON FAULT CLAY ALONG NORTHEASTERN MARGIN OF QINGHAI-XIZANG PLATEAU[J]. China Earthquake Engineering Journal,1996,18(2):69-95.