【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。更多还原

【Abstract】 The Late Pleistocene Huguangyan Formation in Weizhou island, Beihai city, Guangxi consists of volcanic clastic rocks. Volcanic rocks develop near Huguangyan Formation. Near the crater, a series of syn-depositional deformation structures are developped in the Huguangyan Formation, which includes seismic micro-fractures(tensile-shear,tensile,conjugated and ladder fractures), micro-corrugated laminations, sinking rockfall structures and sand-muddy veins. These structures are believed resulting from earthquake related to volcanic activity of the Late Pleistocene.更多还原