茂汶韧性断裂带(耿达—汶川段)的基本特征

茂汶断裂耿达—汶川段主要发育于以花岗岩为主的前寒武系彭灌杂岩体中，韧性变形特征十分明显，在龙门山主干断裂带中具有重要地位。研究表明它是一个由多条断层组成的一个构造应变强化地带，也是一个具多期活动性的破裂带。它是龙门山区发育最早、规模最大的断裂之一。文章还对其形成的构造物理条件和构造意义等进行了讨论

PRINCIPAL FEATURES OF MAOWEN DUCTILE FAULT ZONE (WENCHUAN GENGDA SECTION)

The Maowen fault zone (Wenchuan Gengda section) is mainly developed within the Precambrian Peng Guan Complex in which granite is dominant. The property of ductile deformation is very clear. This fault zone is of great significane and has an important position in the Longmen Mountains fault zone. Researches show that it is an important strong deformed tectonic zone with a great deal of single faults and also a multiphase active broken belt. Tt is of typical importance to the recognization of the fault features in the complex rocks as well as the evolutionary history of the Longmen Mountains tectonic belt. It is one of the earliest developed and largest fault in Longmen Mountains. The tectonic and physical conditions under which this fault zone formed and its structure singnificance are discussed in the paper.