前寒武纪变质岩中古断裂构造及其研究意义  

PALAEOFACTURE STRUCTURE IN PRECAMBRIAN METAMORPHIC ROCKS AND ITS SIGNIFICANCE IN STRUCTURAL STUDY

作　　者：楼法生[1] 

机构地区：[1]江西省地质调查院,江西南昌330201

出　　处：《江西地质》2000年第1期5-9,共5页Jiangxi Geology

摘　　要：古断裂是指在变质岩区与变质岩层变形和变质作用同时发生的，在盖层沉积之前形 成的断裂，其与断层有关的断层岩石在后期又已重新固结成岩。它是前寒武纪变质岩内一种重要的 构造现象。通过研究，概括总结了古断裂的特点及识别古断裂构造的各种标志，同时探讨了古断裂构 造性质。古断裂构造的研究，无疑对提高前寒武纪地质发展史的认识及对成矿分析和成矿预测具有 重要的意义。Palaeofractures refer to those fractures occurring in metamorphic terrain which were formed contemporaneously with the deformation and metamorphism of the metamorphic strata but prior to the sedimentation of the covering strata. They are important structural features in the Precambrian metamorphic rocks. This paper summarizes the characteristics and the main identification criteria of palaeofractures, discusses their structural properties, and briefly analyzes the implications in palaeo fracture study.

关 键 词：前寒武纪 变质岩 变形 古断裂 断裂构造 

分 类 号：P588.3[天文地球—岩石学] P542.3[天文地球—地质学]