广西北海涠洲岛晚更新世火山活动引起的地震同沉积变形构造  

Syn-depositional Deformation Structures by Earthquake Related to Volcanic Activity of the Late Pleistocene in Weizhou Island, Beihai City, Guangxi

作　　者：杜远生[1] 彭冰霞[1] 韩欣[1] 

机构地区：[1]中国地质大学地球科学学院,武汉430074

出　　处：《沉积学报》2005年第2期203-209,共7页Acta Sedimentologica Sinica

基　　金：中国地质大学"转折期创新团队"成果;并受中国地质大学(武汉)留学回国基金项目资助.

摘　　要：广西北海涠洲岛晚更新世湖光岩组为一套火山碎屑沉积,同期火山岩发育。在靠近火山口的地区,湖光岩组发育一系列地震成因的同沉积变形构造,包括:地震微断裂(张扭性地震微断裂、张性地震微断裂、共扼性地震微断裂和阶梯状地震微断裂)、微褶皱纹理、落石沉陷构造和砂泥岩脉。分析认为这些同沉积—变形构造是由同期火山活动引起的地震作用形成的。The Late Pleistocene Huguangyan Formation in Weizhou island, Beihai city, Guangxi consists of volcanic elastic rocks. Volcanic rocks develop near Huguangyan Formation. Near the crater, a series of syn-depositional deformation structures are devehlopped in the Huguangyan Formation, which includes seismic micro-fractures（tensileshear,tensile,conjugated and ladder fractures）, micro-corrugated laminations, sinking rockfall structures and sandmuddty veins. These structures are believed resulting from earthquake related to volcanic activity of the Late Pleistocene.

关 键 词：广西 晚更新世 火山活动 地震 震积岩 

分 类 号：P588.211[天文地球—岩石学]