Carbon and oxygen isotope composition of carbonate in bulk sediment in the southwest Taiwan Basin, South China Sea: Methane hydrate decomposition history and its link to mud volcano eruption
Carbon and oxygen isotope composition of carbonate in bulk sediment in the southwest Taiwan Basin, South China Sea: Methane hydrate decomposition history and its link to mud volcano eruption
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南海台湾盆地西南海域沉积物中碳酸盐的碳氧同位素组成：甲烷水合物分解历史及其与泥火山喷发的联系
DOI：
10.1016/j.marpetgeo.2018.08.031
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发表时间：
2018-12
影响因子：
4.2
通讯作者：
Cheng Weidong
中科院分区：
文献类型：
--
作者：
Zhang Jie;Lei Huaiyan;Chen Yong;Kong Yuan;K;asamy Selvaraj;Ou Wenjia;Cheng Weidong
Anaerobic oxidation of methane (AOM) coupled with sulfate reduction (SR) generates authigenic carbonate which has the unique carbon and oxygen isotope composition in sulfate methane transition zone (SMTZ). The carbon and oxygen isotope composition of carbonate in sediments, which can be used to revel the variable methane flux, is affected by the percentage of AOM-driven carbonate in sediments. To investigate the methane hydrate decomposition history in the southwest Taiwan Basin, we analyzed a 13 m-long sediment core for grain size, carbonate and elemental carbon contents and stable carbon and oxygen isotopes composition of carbonate (δ13Ccarband δ18Ocarb). The AMS14C dating results and carbonate content reveal that a turbidity current occurred at around 14 ka B.P., which reversed sediment accumulation between 455 and 885 cm in depth. Combining the chronological framework and δ13Ccarbvalues, we identified that the methane hydrate decomposition scale began to decrease at 14 ka B.P. Moreover, we discovered that three transiently enhanced methane hydrate decomposition events occurred from then on. Although the δ13Ccarband δ18Ocarbvariability are as expected, the low δ18Ocarbvalues are inconsistent with the previous theory which favors18O-enriched in AOM-driven authigenic carbonate. Thus, we suggest that a large amount of18O-depleted water which originally migrated from southwest Taiwan island was injected into surface sediment along with the eruption of mud volcanos. As the terminal electron accepter of AOM-SR reaction, the exogenous18O-depleted water leads its special oxygen isotope to be inherited by the authigenic AOM-driven carbonate. The proposed theory provides new insights on the authigenic carbonate in methane hydrate area and the association between methane hydrates and mud volcanoes.
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影响因子：
8.3
作者：
TALMA, AS;VOGEL, JC
通讯作者：
VOGEL, JC
DOI：
10.1016/j.dsr.2016.06.010
发表时间：
2016-09
期刊：
--
影响因子：
--
作者：
Qixiang Lin;Jiasheng Wang;T. Algeo;Pibo Su;G. Hu
通讯作者：
Qixiang Lin;Jiasheng Wang;T. Algeo;Pibo Su;G. Hu
DOI：
10.1007/s11430-015-5182-7
发表时间：
2015-09
期刊：
Science China Earth Sciences
影响因子：
--
作者：
Qixiang Lin;Jiasheng Wang;S. Fu;Hongfeng Lu;Q. Bu;Rongxiao Lin;Fei Sun
通讯作者：
Qixiang Lin;Jiasheng Wang;S. Fu;Hongfeng Lu;Q. Bu;Rongxiao Lin;Fei Sun
西沙群岛近海晚中新世环礁系统的演化
DOI：
10.1007/s11430-014-4962-9
发表时间：
2014
期刊：
Science China Earth Sciences
影响因子：
--
作者：
Kuang ZengGui;Guo YiQun;Wang LiaoLiang;Liang JinQiang;Sha ZhiBin
通讯作者：
Sha ZhiBin
南海北部等高线流的现场观测：在深水沉积物输送中的应用
影响因子：
5.3
作者：
Li, Jianru;Wang, Meng;Wang, Wenguang;Xu, Jingping
通讯作者：
Xu, Jingping