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; LI Yang

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CHEN Zhong, XIA Bin, YAN Wen, CHEN Mu-hong, YANG Hui-ning, GU Sen-chang, LI Yang. Distribution,chemical characteristics and source area of volcanic glass in the South China Sea[J]. Haiyang Xuebao, 2005, 27(5): 73-81.

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Distribution,chemical characteristics and source area of volcanic glass in the South China Sea

1.
Open Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology and Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510301, China
2.
Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China
3.
Guangzhou Marine Geological Servey Bureau, Guangzhou 510075, China

Received Date: 2003-11-07
Rev Recd Date: 2004-10-28

Abstract

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 chang 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 corevolcanic 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 intrabasinal 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.
- volcanic glass,
- distribution characteristics,
- chemical composition,
- transport force,
- source area,
- South China Sea

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References(37)

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