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南海火山玻璃的分布特征、化学成分及源区探讨
引用本文:陈忠,夏斌,颜文,陈木宏,杨慧宁,古森昌,李扬.南海火山玻璃的分布特征、化学成分及源区探讨[J].海洋学报,2005,27(5):73-81.
作者姓名:陈忠  夏斌  颜文  陈木宏  杨慧宁  古森昌  李扬
作者单位:1.中国科学院边缘海地质重点实验室, 广东广州 510301
基金项目:中国科学院知识创新工程重要方向资助项目(KZCX2-SW-117;KZCX3-SW-220);国家自然科学基金资助项目(40406011);国家“863”计划青年基金资助项目(2004AA616090).
摘    要:研究了南海火山玻璃的分布特征、化学成分及源区,结果表明,表层沉积物中的火山玻璃含量基本呈南北向分布,由北部、西部、南部大陆架分别向中部、东部深海盆逐渐增加;柱样沉积物中的火山玻璃在深海盆出现的层数多、含量大.火山玻璃化学组分之间的相关性不显著,表层沉积物中的火山玻璃属于安山岩,柱样沉积物中的火山玻璃的岩石类型广泛,主要属于安山岩和流纹岩.菲律宾岛弧火山带、南海深海盆火山喷发以及印尼岛弧火山带是南海火山玻璃主要源区,火山玻璃搬运和沉积主要受台风、越赤道气流和环流的影响和控制.

关 键 词:火山玻璃    分布特征    化学成分    搬运营力    源区    南海
文章编号:0253-4193(2005)05-0073-09
收稿时间:2003-11-07
修稿时间:2003-11-072004-10-28

Distribution,chemical characteristics and source area of volcanic glass in the South China Sea
CHEN Zhong,XIA Bin,YAN Wen,CHEN Mu-hong,YANG Hui-ning,GU Sen-chang and LI Yang.Distribution,chemical characteristics and source area of volcanic glass in the South China Sea[J].Acta Oceanologica Sinica (in Chinese),2005,27(5):73-81.
Authors:CHEN Zhong  XIA Bin  YAN Wen  CHEN Mu-hong  YANG Hui-ning  GU Sen-chang and LI Yang
Institution:1.Open Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology and Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510301, China2.Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China3.Guangzhou Marine Geological Servey Bureau, Guangzhou 510075, China
Abstract:Volcanic glasses are widely distributed in sediment of the South China Sea. The volcanic glasses from surface sediment show a north-south distribution pattern , and their contents increase gradually from northern, western, southern continental shelf to middle and eastern deep-sea basin, respectively. The change of volcanic glasses in core sediment nearly is the same as that of surficial sediment, the layer number of volcanic glass is more and the contents are higher in the deep-sea basin. There is no obvious correlation among chemical composition of volcanic glasses. From TAS diagram, it can be argued that surficial volcanic glasses belong to andesite rocks, and the rock types of core volcanic glasses are broad, but the most types are andesite and rhyolite rocks. The more potential sources of volcanic glasses in the South China Sea, China are the Philippine arc volcanoes and the deep-sea intra-basinal submarine volcanoes, the next is the Indonesian arc volcanoes, but the volcanic activity of Indo-China Peninsula and South China less impacts on volcanic glass deposition . The transport and deposition of volcanic glasses are mainly controlled by typhoons, cross-equatorial flow and geostrophic current.
Keywords:volcanic glass  distribution characteristics  chemical composition  transport force  source area  South China Sea
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