Mid-Cretaceous carbon cycle perturbations and Oceanic Anoxic Events recorded in southern Tibet.
Mid-Cretaceous carbon cycle perturbations and Oceanic Anoxic Events recorded in southern Tibet.
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藏南地区白垩纪中期碳循环扰动与海洋缺氧事件
DOI：
10.1038/srep39643
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发表时间：
2016-12-21
影响因子：
4.6
通讯作者：
Sha J
中科院分区：
文献类型：
--
作者：
Zhang X;Chen K;Hu D;Sha J
本文给出了藏南岗巴地区查切拉剖面中白垩统~ 1.7km厚地层的有机碳同位素（δ 13 Corg）曲线。碳同位素化学地层对比结合生物地层学约束表明，查切拉剖面跨越阿普第阶早期至坎帕尼亚早期，中白垩世期间几乎所有的碳循环扰动和海洋缺氧事件都在特提斯洋东南部的大陆边缘地区得到了很好的记录。值得注意的是，在Aptian-Albian边界附近的OAE 1b开始时，确定了两个水平的甲烷衍生自生碳酸盐。我们认为，天然气水合物甲烷释放的增加，可能是由海平面下降和底层水温上升驱动的，可能是导致OAE 1b期间δ 13 Corg大幅负偏移和全球变暖的原因。
The organic carbon isotope (δ13Corg) curve for ~1.7-km-thick mid-Cretaceous strata of the Chaqiela section in Gamba area, southern Tibet is presented in this study. C-isotopic chemostratigraphic correlation combined with biostratigraphic constraints show that the Chaqiela section spans early Aptian through early Campanian period, and that almost all of the carbon cycle perturbations and Oceanic Anoxic Events during the mid-Cretaceous period are well recorded in the continental margin area of the southeastern Tethys Ocean. Significantly, two levels of methane-derived authigenic carbonates were identified at the onset of OAE1b near the Aptian-Albian boundary. We suggest that an increase in methane release from gas hydrates, potentially driven by sea-level fall and bottom water temperature increase, may have contributed to the large negative δ13Corgexcursions and global warming during OAE1b.
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影响因子：
2.1
作者：
Gale, A. S.;Bown, P.;Wray, D. S.
通讯作者：
Wray, D. S.
影响因子：
5.8
作者：
Herrle, Jens O.;Schroeder-Adams, Claudia J.;Fath, Jared
通讯作者：
Fath, Jared
影响因子：
4.2
作者：
Reitner, Joachim;Blumenberg, Martin;Duda, Jan-Peter
通讯作者：
Duda, Jan-Peter
影响因子：
5.3
作者：
Herrle, JO;Kössler, P;Hemleben, C
通讯作者：
Hemleben, C
影响因子：
2.7
作者：
Li, XH;Jenkyns, HC;Cui, J
通讯作者：
Cui, J