同韧性剪切断裂特征及其研究意义  

QUASI DUCTILE FRACTURES AND THEIR GEOLOGICAL SIGNIFICCANCE

作　　者：王义强[1,2,3] 吕古贤 杜子图[1,2,3] 

机构地区：[1]长春科技大学 [2]地质科学院地质力学研究所 [3]中国地质大学

出　　处：《地质力学学报》1999年第2期90-96,共7页Journal of Geomechanics

基　　金：国家计委科技找矿项目

摘　　要：同韧性剪切断裂是一种新的断裂类型，它既不同于脆性断裂，也不同于韧性剪切带。它是韧性剪切带在一定条件下发展到一定程度转化为宏观破裂的产物，在宏观、微观、地球化学等许多方面独具特征。它的研究对丰富和发展构造地质学理论、地质找矿、地震、地质灾害、工程稳定等许多方面有重要意义。A Quasi ductile fractures is a new type of fractures which is different from either the brittle ruptures or the ductile shear zone.It occurs mainly at the centre of a ductile shear zone and may develop later from a further,shearing of the rocks.Such fractures are often Characterized by breccias composed of mylonites and by vertical and horizontal zoning of mineralization at high temperatures and pressures.Fluid carrying Pb.S etc may partly come from the mylonites.There are decrease or loss of some elements in the wall rocks at the both sides of mineralized belts .Microfissures,cataclastic flows and strain localization are found in them.

关 键 词：同韧性剪切断裂 糜棱角砾岩 断层 脆性断裂 

分 类 号：P542.3[天文地球—构造地质学] P588.212.5[天文地球—地质学]