南海东北部陆坡天然气水合物钻探区生物地层与沉积速率

陈芳; 庄畅; 周洋; 苏新; 段虓; 刘广虎; 吴聪; 荆夏

doi:10.3799/dqkx.2016.033

Volume 41 Issue 3

Mar. 2016

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Article Navigation > Earth Science > 2016 > 41(3): 416-424

Chen Fang, Zhuang Chang, Zhou Yang, Su Xin, Duan Xiao, Liu Guanghu, Wu Cong, Jing Xia, 2016. Calcareous Nannofossils and Foraminifera Biostratigraphy on the Northeastern Slope of the South China Sea and Variation in Sedimentation Rates. Earth Science, 41(3): 416-424. doi: 10.3799/dqkx.2016.033

Citation:

Chen Fang, Zhuang Chang, Zhou Yang, Su Xin, Duan Xiao, Liu Guanghu, Wu Cong, Jing Xia, 2016. Calcareous Nannofossils and Foraminifera Biostratigraphy on the Northeastern Slope of the South China Sea and Variation in Sedimentation Rates. Earth Science, 41(3): 416-424. doi: 10.3799/dqkx.2016.033

Citation:

Chen Fang, Zhuang Chang, Zhou Yang, Su Xin, Duan Xiao, Liu Guanghu, Wu Cong, Jing Xia, 2016. Calcareous Nannofossils and Foraminifera Biostratigraphy on the Northeastern Slope of the South China Sea and Variation in Sedimentation Rates. Earth Science, 41(3): 416-424. doi: 10.3799/dqkx.2016.033

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Calcareous Nannofossils and Foraminifera Biostratigraphy on the Northeastern Slope of the South China Sea and Variation in Sedimentation Rates

doi: 10.3799/dqkx.2016.033

1.
MLR Key Laboratory of Marine Mineral Resources, Guangzhou Marine Geologic Survey, Guangzhou 510075, China
2.
School of Marine Geosciences, China University of Geosciences, Beijing 100083, China

Received Date: 2015-10-22
Publish Date: 2016-03-15

Abstract

Abstract

Middle Pleistocene to Holocene calcareous nannofossils and foraminifera biostratigraphy in 5 sites (GMGS05、GMGS07、GMGS08、GMGS09 and GMGS16) from the Dongsha gas hydrate drilling area of the northeastern South China Sea have been studied. A total of 3 nannofossils events and 2 foraminifera events from middle Pleistocene to Holocene were recognized. The oldest sediments recovered are in an age of middle Pleistocene, younger than 0.50 Ma, the age assigned for gas hydrate occurrence zone is middle Pleistocene to Holocene in sites GMGS05、GMGS07、GMGS08 and GMGS16.Sedimentation rates varied from 36.9 cm/ka to 73.3 cm/ka, and reaching the highest average value 54.2 cm/ka since 0.12 Ma in the Dongsha gas hydrate drilling area. The mean sedimentation rate has been 47.4 cm/ka since 0.44 Ma.The results suggested that the gas hydrate drilling area is located at sedimentary body with high sedimentation rate, which is advantageous to gas hydrate formation. This conclusion is consistent with the previous research.
- biostratigraphy,
- sedimentation rate,
- middle Pleistocene,
- gas hydrate drilling area,
- northeastern slope of South China Sea

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Calcareous Nannofossils and Foraminifera Biostratigraphy on the Northeastern Slope of the South China Sea and Variation in Sedimentation Rates

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