广西河池—宜州断裂带变形特征及演化探讨  

THE DEFORMATION FEATURE AND A PROBE INTO THE EVOLUTION OF HECHI-YIZHOU FAULT ZONE IN GUANGXI

作　　者：蒙永潘 杨善畅 李秀珍[1] 

机构地区：[1]桂林理工大学广西隐伏金属矿产勘察重点实验室,广西桂林541004 [2]广东省环境地质勘查院,广东广州510080

出　　处：《云南地质》2016年第4期466-471,共6页Yunnan Geology

基　　金：基金项目:桂中凹陷东缘构造体系演化与矿床预测评价指标研究(编号:GXZC2015-G3-3917-KLZB-O)

摘　　要：研究发现,呈近东西向舒缓波状展布的广西河池-宜州断裂带,其两侧不同构造单元的构造线方向有着截然不同的特点。河池-宜州断裂带北侧为桂北隆起,该构造单元中北北东向的断裂在终止于河池-宜州断裂带时,构造线转向东凸出;而河池-宜州断裂带以南的桂中凹陷中近南北向断裂和褶皱轴迹,在终止于河池-宜州断裂带时,则呈现向西凸出。这表明河池-宜州断裂带是在东西向挤压下形成的,具有逆冲-右旋平移剪切构造特征。河池-宜州断裂带发育于加里东期,并经历海西期、印支期和燕山期的多期活动,其中印支期活动最为强烈。According to the study, we have discovered the direction ol structural line ol different structural u-nit in 2 sides ol nearly E-W gentle wavy Hechi-Yizhou fault zone in Guangxi is very different. N Guangxi Rise is in the N side of Hechi-Yizhou fault zone. The NNE fault ol it ends at Hechi-Yizhou fault zone and then the structural line turns to sticking out towards E ; whereas the nearly N-S fault and fold axis in central Guangxi depression south of Hechi-Yizhou fault zone shows sticking out towards W after ending at Hechi-Yizhou fault zone. It indicates He-chi-Yizhou fault zone is formed under E-W Pressure, with the feature of thrust dextrorotation strike-slip shear struc-ture. Hechi-Yizhou fault zone is developed from Caledonian, experiences the multiphase movement of Variscan, Indosinian and Yanshanian. Indosinian movement is the most intense one in them.

关 键 词：河池—宜州断裂带 桂北隆起 桂中凹陷 右行剪切构造 广西 

分 类 号：P542[天文地球—构造地质学]