南海北部甲烷渗漏系统环境变化的碳、氧同位素记录

杨克红; 于晓果; 初凤友; 董彦辉

doi:10.3799/dqkx.2016.098

Volume 41 Issue 7

Jul. 2016

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Yang Kehong, Yu Xiaoguo, Chu Fengyou, Dong Yanhui, 2016. Environmental Changes in Methane Seeps Recorded by Carbon and Oxygen Isotopes in the Northern South China Sea. Earth Science, 41(7): 1206-1215. doi: 10.3799/dqkx.2016.098

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Yang Kehong, Yu Xiaoguo, Chu Fengyou, Dong Yanhui, 2016. Environmental Changes in Methane Seeps Recorded by Carbon and Oxygen Isotopes in the Northern South China Sea. Earth Science, 41(7): 1206-1215. doi: 10.3799/dqkx.2016.098

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Environmental Changes in Methane Seeps Recorded by Carbon and Oxygen Isotopes in the Northern South China Sea

doi: 10.3799/dqkx.2016.098

Yang Kehong^{1,2
,},
Yu Xiaoguo^1,2,
Chu Fengyou^1,2,
Dong Yanhui^1,2

1.
The Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
2.
Key Laboratory of Submarine Geosciences, State Oceanic Administration, Hangzhou 310012, China

Received Date: 2015-09-30
Publish Date: 2016-07-15

Abstract

Abstract

Cold seep carbonates record the changes of fluids and environments in the methane seepages, which is important to reveal the sedimentary environment changes. The carbon and oxygen isotope profiles of the northern South China Sea and their vary intervals were studied. The results show that there are correlations between δ¹³C and δ¹⁸O along the profiles. Combined with the published δ¹³C and δ¹⁸O data, it is suggested that the correlations between them along the profiles are common, with the maximum correlation coefficient R² of 0.933 1. Accroding to the statistics results, both the δ¹³C and δ¹⁸O vary greatly for the cold seep carbonates in the northern South China Sea, which maximal varing interval can be 34.50×10^-3 and 5.89%(Vienna Pee Dee Belemnite, V-PDB), respectively. The correlations between δ¹³C and δ¹⁸O along the profiles perhaps indicate the changes of original fluids, the mineral formation or recrystallization, the complex methane seep systems and the diagenetic effects. For different cold seep carbonates, the vary intervals of δ¹³C were influenced by the participation degree of seawater, and the vary intervals of δ¹⁸O perhaps were related with the precipitation temperature and the Mg of calcite.
- isotope,
- methane seep,
- cold seep carbonate,
- the northern South China Sea,
- environmental geology

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References(49)

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Environmental Changes in Methane Seeps Recorded by Carbon and Oxygen Isotopes in the Northern South China Sea

doi: 10.3799/dqkx.2016.098

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