论海啸作用与海啸岩  

TSUNAMI AND TSUNAMITES

作　　者：杜远生[1] 韩欣[1] 

机构地区：[1]中国地质大学,湖北武汉430074

出　　处：《地质科技情报》2000年第1期19-22,共4页Geological Science and Technology Information

基　　金：国家科技部攀登(附加 )SSER项目成果

摘　　要：海啸 (或称津浪 ,tsunami)是海底地震 (海震 )、火山爆发等因素引发的巨浪。海啸可以在海底形成特殊的事件沉积——海啸岩。海啸岩主要由具丘状层理、平行层理、块状层理及交错层理的粗碎屑岩或碎屑灰岩组成 ,它们与触发海啸的地震、火山形成的震积岩、火山岩紧密共生。根据云南滇中地区中元古代昆阳群大龙口组的观测研究 ,认为大龙口组中存在典型的震积岩 (包括震裂岩、震褶岩、自碎屑角砾岩 )。与之共生的具丘状层理、平行层理的内碎屑副角砾岩、含砾砂屑灰岩为海啸岩成因 ,它们组成典型的震积岩—海啸岩序列。Tsunami is a billow induced by the earthquake and volcanic eruption in the sea bottom.Tsunnami not only harms the mankind,but also deposits a particular event layer,i.e.tsunamite.Tsunamites are macroclastic rocks or clastic limestone with hummocky beddings and parallel beddings,massive beddings,and cross beddings.Tsunamite accretes closely with seismites and volcanic rocks.Mesoproterozoic Dalongkou Formation(Kunyang Group)in central Yunnan Province consists of typical seismites (seismic corrugated rock,shattering rock and autoclastic breccia).The intraclastic parabreccias,clastic limestone with hummocky bedding and parallel bedding,which correlates closely with the seismites,are tsunamite.They constitute typical sequences of seismites and tsunamite.

关 键 词：海啸 海啸岩 地震 震积岩 事件沉积 

分 类 号：P588.2[天文地球—岩石学] P731.25[天文地球—地质学]