南海西北部火山岩地震属性特征及发育模式  

Seismic Attributes and Evolutional Models of Volcanic Rocks in Northwest Part of South China Sea

作　　者：鲁银涛[1,2,3] 王彬 吕福亮 范国章 吴敬武 李东 

机构地区：[1]中国科学院海洋研究所海洋地质与环境重点实验室,青岛266071 [2]中国石油杭州地质研究院,杭州310023 [3]中国科学院大学,北京100049

出　　处：《地球物理学进展》2014年第5期2407-2410,共4页Progress in Geophysics

基　　金：国家科技重大专项项目25课题4(2011ZX05025-004)

摘　　要：南海经历了断陷、海底扩张、坳陷、热沉降等构造演化阶段,发育了一系列火山岩.本文以南海西北部为研究区域,以地震资料为基础,通过拾取火山岩表现的典型的强振幅、高速等地球物理特征,对火山岩发育特征进行了分析.并结合陆上火山岩发育模式,对火山岩的相带进行了划分,认为研究区发育火山通道相、火山口相、溢出相、喷发相和火山沉积相火山岩.通过分析火山发育地区的构造背景,建立了本区火山岩发育的模式,认为火山岩沿断裂发育,岩浆物质沿断裂向上活动,最终喷发形成火山.South China Sea（SCS）has been experienced rift,sea-floor spreading,post-rift and thermal subsidence stages.Thus,abundant volcanic rocks developed in SCS.In this paper,we identified their typical high amplitude and high velocity character by using seismic data in Northwest part of SCS,and we also analyzed their character of volcanic rocks.Combining with the outcrop in continental area,we divided volcanic rocks to different facies.They are conduit facies,crater facies,overflow facies,eruptive facies and sedimental facies.We established the volcanic model by employing study of tectonic background.It seems like that the magma flow up along the faults,then formed volcanoes in study area finally.

关 键 词：南海西北部 火山岩 相带 发育模式 

分 类 号：P631[天文地球—地质矿产勘探]