南海北部BY1钻孔沉积物元素地球化学特征及其古环境意义

doi:10.11978/j.issn.1009-5470.2012.05.002

热带海洋学报 ›› 2012, Vol. 31 ›› Issue (5): 6-11.doi: 10.11978/j.issn.1009-5470.2012.05.002cstr: 32234.14.j.issn.1009-5470.2012.05.002

南海北部BY1钻孔沉积物元素地球化学特征及其古环境意义

刘坚1, 陆红锋1, 苏新2, 陈芳1, 陈道华1, 程思海1

1. 广州海洋地质调查局, 广东广州 510760; 2. 中国地质大学(北京), 北京 100083

收稿日期:2011-08-30 修回日期:2012-03-06 出版日期:2012-11-01 发布日期:2013-02-06
通讯作者:
作者简介:刘坚(1965—), 男, 湖南省攸县人, 高级工程师, 硕士, 主要从事海洋地球化学研究。
基金资助:
国家重点基础发展研究规划项目(2009CB219502)

Element geochemistry of Core BY1 from the northern South China Sea and its paleoenvironmental implication

LIU Jian1, LU Hong-feng1, SU Xin2, CHEN Fang1, CHEN Dao-hua1, CHENG Si-hai1

1. Guangzhou Marine Geologic Survey, Guangzhou 510760, China; 2. China University of Geosciences, Beijing 100083, China

Received:2011-08-30 Revised:2012-03-06 Online:2012-11-01 Published:2013-02-06

摘要/Abstract

摘要： 南海北部BY1钻孔沉积物主、微量元素地球化学分析结果表明, CaCO₃含量呈现间冰期高、冰期低的稀释旋回, 而SiO₂、Al₂O3、Fe₂O₃、MgO、K₂O、TiO₂等含量变化与CaCO₃相反。沉积物中大多数主、微量元素的Ti标准化值变化与有孔虫氧同位素揭示的冰期—间冰期旋回有良好的对应关系, 呈现间冰期高、冰期低的变化特征, 反映了间冰期物源区化学风化增强, 指示了温暖、湿润的气候环境, 表明间冰期东亚季风夏季风的增强。

关键词: 元素地球化学, 化学风化, 古环境, 南海北部

Abstract: Sediment of Core BY1 from the northern South China Sea was measured for its major and minor element compositions. The results show that CaCO₃ content follows the “Atlantic cyclicities” pattern: lower during glacial stages and higher during interglacial stages, whereas the variations of SiO₂, Al₂O₃, Fe₂O₃, MgO, K₂O, TiO₂ are reversed. Ti-normalized ratios of most elements are higher during interglacials and lower during glacials, reflecting stronger chemical weathering in interglacials than in glacials and warm and wet climate in the source area. This may be the result of an enhanced East Asian summer monsoon.

Key words: element geochemistry, chemical weathering, paleoenvironment, northern South China Sea

中图分类号:

P736.2

刘坚,陆红锋,苏新,陈芳,陈道华,程思海. 南海北部BY1钻孔沉积物元素地球化学特征及其古环境意义[J]. 热带海洋学报, 2012, 31(5): 6-11.

LIU Jian,LU Hong-feng,SU Xin,CHEN Fang,CHEN Dao-hua,CHENG Si-hai. Element geochemistry of Core BY1 from the northern South China Sea and its paleoenvironmental implication[J]. Journal of Tropical Oceanography, 2012, 31(5): 6-11.

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南海北部BY1钻孔沉积物元素地球化学特征及其古环境意义

Element geochemistry of Core BY1 from the northern South China Sea and its paleoenvironmental implication

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