海洋科学Issue(7)：103-111,9.DOI:10.11759/hykx20140905001
南海北部湾东部海域表层沉积物地球化学特征
Geochemical characteristics of the surface sediments in the eastern Beibu Gulf, South China Sea
摘要
Abstract
Based on the correlation analysis of the grain size and geochemical compositions of 61 surface-sediments samples from the eastern Beibu Gulf, South China Sea, the features of spatial distributions, correlations and com-binations of the elements were characterized, and the main controlling factors of the elements were identified. The results showed that most of elements, such as SiO2, Al2O3, Fe2O3, MgO, Na2O, TiO2, TiO2, P2O5, V, Co, Cu, Ni, Zn, Ba, Sc, Ga, Pb and Cr, have similar spatial distributions, indicative of the stable sedimentary environment and material sources. Based on the distributions of the elements/Al2O3 ratio, it can be concluded that the sediments in Guangxi and Hainan nearshore are mainly composed of terrigenous materials and transported from the coastal area to the offshore, and the sediments in the central area of the gulf are mainly from the Red River. The results of the correlation analysis and factor analysis suggest that the grain size is the main factor controlling the distribution of most of the major and trace elements in the study area. The CaO and Sr are controlled by the biogenic substance. The contents of Zr mainly depend on the geological features of source area and the distance from its point of origin. However, the distribution of MnO is affected by terrestrial input, submarine hydrothermal solution and authigenous minerals together.关键词
北部湾/表层沉积物/地球化学Key words
The Beibu Gulf/surface sediments/Geochemistry分类
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崔振昂,林进清,甘华阳,刘文涛,张亮..南海北部湾东部海域表层沉积物地球化学特征[J].海洋科学,2015,(7):103-111,9.基金项目
国土资源部海底矿产资源重点实验室开放基金项目(KLMMR-2013-A-14) （KLMMR-2013-A-14）
