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.
出处
《沉积学报》
CAS
CSCD
北大核心
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.
关键词
广西
晚更新世
火山活动
地震
震积岩
Guangxi, the Late Pleistocene, volcanic activity, earthquake, seismites
