桂东南那卜地区古生代变质岩系的构造演化序列  

THE TECTONIC EVOLUTIONARY SUCCESSION OF THE PALEOZOIC METAMORPHIC ROCKS SERIES IN NABU AREA,SOUTHEASTERN GUANGXI

作　　者：覃小锋[1] 李锦诚[1] 

机构地区：[1]广西区域地质调查研究院,广西桂林541003

出　　处：《广西地质》2001年第2期7-13,共7页Guangxi Geology

摘　　要：桂东南那卜地区古生代变质岩系 ,主要由花岗质岩石 (宁潭超单元 )和古生界组成。岩石构造变形强烈 ,构造形迹复杂 ,根据不同尺度上观察到的各种构造要素的几何学、运动学、构造应力场以及相互叠加关系等特征 ,可将其组成不同的构造组合 (群落 )。依据各构造组合之间的相互关系、同位素年龄 ,并结合相应的变质事件和岩浆活动事件等 ,建立起 2个旋回和 4个世代的构造变形序列。并初步探讨了古生代变质岩系的构造演化过程。The tectonic deformation in the Paleozoic metamorphic rocks series in the Nabu area of southeastern Guangxi that composed mainly of granitic rocks (Ningtan granite supper-units) and Paleozoic erathem is strong. The tectonic fabric is complex. The different tectonic combinations (communities) may be established in terms of the common characteristics of the tectonic elements in geometry, kinematics, tectonic stress field and superposed relation each other which were observed with different scales. According to the mutual relations of each tectonic combinations, isotopic age, metamorphism event and magma event- the tectonic deformation successions were established which include two cycles and four generations. The tectonic evolutionary process of the Paleozoic metamorphic rocks series have been discussed primary.

关 键 词：古生代 变质岩系 构造变形序列 演化 岩浆活动 变质事件 同位素年龄 构造应力场 

分 类 号：P588.3[天文地球—岩石学] P55[天文地球—地质学]