南海深水区晚更新世以来沉积速率、沉积通量与物质组成

章伟艳; 张富元; 陈荣华; 张霄宇

南海深水区晚更新世以来沉积速率、沉积通量与物质组成

1 国家海洋局第二海洋研究所、国家海洋局海底科学重点实验室,杭州,310012;
2 浙江大学地球科学系,杭州,310012

基金项目: “九五”国家专项重大资助项目;国家海洋局青年海洋科学基金资助项目 (批准号 :2001510)

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章伟艳女 1972年出生助理研究员硕士海洋地质

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Constituents of Matter and Sedimentation Fluxes and Sedimentation Rates of Deep-water Sedimentation during the Late Pleistocene in the South China Sea

1 Second Institute of Oceanography,SOA,Key Lab of Submarine Science,SOA, Hangzhou 310012;
2 Department of the Earth Science, Zhejiang University, Hangzhou 310012

摘要

摘要: 通过调查所获得柱样沉积物氧碳同位素测年资料及多学科综合分析表明,晚更新世以来南海沉积速率和沉积通量具有以下几个特征 :(1)总体上为间冰期沉积速率低、冰期沉积速率高,冰期沉积速率是间冰期沉积速率的 1.3～ 1.6倍;(2 )南海沉积速率趋势面分析表明,氧同位素 1期东北陆坡和西南陆坡沉积速率高,氧同位素 2、3期沉积速率分布特征相似,与 1期有所不同,东北陆坡沉积速率高于西南陆坡,表明氧同位素 2期之后,南海的沉积环境发生明显的改变,造成上述沉积速率分布的主要控制因素是南海周围的河流分布、季风、海流等;(3)南海东部沉积通量与物质组成分析表明,末次冰期以来沉积总通量北部陆坡区明显高于深海区,前者是后者 2～ 3倍,并有自北向南逐渐降低的趋势;(4)硅质生物沉积通量冰期明显高于间冰期,末次冰期以来东北部陆坡区的硅质生物沉积通量最高,末次冰期之前恰好相反,深海盆高于陆坡区;(5 )末次冰期以来,陆源沉积约占南海东部海域沉积的 4 4 %以上。
- 南海 /
- 晚更新世 /
- 沉积通量 /
- 沉积速率
Abstract: Based on the integrated study of sediment cores in the South China Sea, the sedimentation rates fea-ture during the Late Pleistocene has been shown. ( 1)On the whole, the rates of glacial stages is 1. 3 ～ 1. 6 timesfor the interglacials. ( 2) T rend analysis on the sedimentation rate is performed, which indicates that the rates of cores during δ¹⁸ O Stage 1 were high in the northeastern and south western continental slope. The features resulted from trend analysis were the main controlling factorsof the river distribution, monsoon and ocean current etc. The sedimentation rates of cores during δ¹⁸ O Stage 2 and 3 were similar, which were different from that of during δ ¹⁸ O Stage 1, only that were high on the northeastern continental slope. So the sediment environment in the South Chi-na Sea was significantly modified after the δ¹⁸ O Stage 2.Based on the study of sediment cores in the Eastern South China Sea, the constituents of the main matter and sedimentation fluxes feature were obtained. ( 1) From the last glacial stage, the sedimentation fluxes on the north- ern continental slope were higher than that of the deep basin. ( 2)The sedimentation fluxes of silicon -organic-sub-stances during the glacial stage were higher than that of the interglacials. ( 3) From the last glacial stage, the ter-rigenous constituents were 44 %above in the abyssal plains sediments.
- South China Sea /
- Late Pleistocene /
- sedimentation fluxes /
- sedimentation rates

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参考文献(17)

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南海深水区晚更新世以来沉积速率、沉积通量与物质组成

作者简介:
章伟艳女 1972年出生助理研究员硕士海洋地质

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Constituents of Matter and Sedimentation Fluxes and Sedimentation Rates of Deep-water Sedimentation during the Late Pleistocene in the South China Sea

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南海深水区晚更新世以来沉积速率、沉积通量与物质组成

1 国家海洋局第二海洋研究所、国家海洋局海底科学重点实验室,杭州,310012;

2 浙江大学地球科学系,杭州,310012

作者简介:
章伟艳女 1972年出生助理研究员硕士海洋地质

English Abstract

Constituents of Matter and Sedimentation Fluxes and Sedimentation Rates of Deep-water Sedimentation during the Late Pleistocene in the South China Sea

1 Second Institute of Oceanography,SOA,Key Lab of Submarine Science,SOA, Hangzhou 310012;

2 Department of the Earth Science, Zhejiang University, Hangzhou 310012

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南海深水区晚更新世以来沉积速率、沉积通量与物质组成

作者简介: 章伟艳 女 1972年出生 助理研究员 硕士 海洋地质

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Constituents of Matter and Sedimentation Fluxes and Sedimentation Rates of Deep-water Sedimentation during the Late Pleistocene in the South China Sea

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南海深水区晚更新世以来沉积速率、沉积通量与物质组成

1 国家海洋局第二海洋研究所、国家海洋局海底科学重点实验室,杭州,310012; 2 浙江大学地球科学系,杭州,310012

作者简介: 章伟艳 女 1972年出生 助理研究员 硕士 海洋地质

English Abstract

Constituents of Matter and Sedimentation Fluxes and Sedimentation Rates of Deep-water Sedimentation during the Late Pleistocene in the South China Sea

1 Second Institute of Oceanography,SOA,Key Lab of Submarine Science,SOA, Hangzhou 310012; 2 Department of the Earth Science, Zhejiang University, Hangzhou 310012

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作者简介:
章伟艳女 1972年出生助理研究员硕士海洋地质

1 国家海洋局第二海洋研究所、国家海洋局海底科学重点实验室,杭州,310012;

2 浙江大学地球科学系,杭州,310012

作者简介:
章伟艳女 1972年出生助理研究员硕士海洋地质

1 Second Institute of Oceanography,SOA,Key Lab of Submarine Science,SOA, Hangzhou 310012;

2 Department of the Earth Science, Zhejiang University, Hangzhou 310012