Ammonite biostratigraphy and organic carbon isotope chemostratigraphy of the early Aptian oceanic anoxic event (OAE 1a) in the Tethyan Himalaya of southern Tibet
Ammonite biostratigraphy and organic carbon isotope chemostratigraphy of the early Aptian oceanic anoxic event (OAE 1a) in the Tethyan Himalaya of southern Tibet
复制标题
藏南特提斯喜马拉雅地区早期阿普第海洋缺氧事件(OAE 1a)的菊石生物地层学和有机碳同位素化学地层学
DOI：
10.1016/j.palaeo.2017.07.010
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发表时间：
2017-11
期刊：
影响因子：
--
通讯作者：
Wang Chengshan
中科院分区：
文献类型：
--
作者：
Chen Xi;Idakieva Vyara;Stoykova Kristalina;Liang Huiming;Yao Hanwei;Wang Chengshan
早阿普第阶海洋缺氧事件（OAE 1a）在西特提斯、北大西洋和太平洋已广为人知，但在东特提斯至今未见报道。本文报道了藏南古错地区阿普第阶下统的有机碳同位素和菊石生物地层学资料。这些发现首次证明了OAE 1a在东特提斯的发生。研究的层序属于D. forbesiandD.阿普第阶晚期的deshayesiammonite带。δ ~（13）Corg数据与已发表的来自西特提斯和太平洋的Aptian早期碳同位素记录可以进行对比。在剖面上部有一个明显的碳同位素负偏移（2.4‰），对应于OAE 1a的C3段，随后的正偏移对应于C4段。古错地区的碳同位素绝对值高于西特提斯和赤道太平洋已知剖面。我们认为成岩蚀变作用是古错地区高绝对值的主要原因。
The early Aptian oceanic anoxic event (OAE 1a) is well known in the western Tethys, the North Atlantic and the Pacific Ocean, but has not been reported in the eastern Tethys to date. In this paper, we present bulk organic carbon isotope data and ammonite biostratigraphy of a lower Aptian succession from the Gucuo area (southern Tibet). These findings document the occurrence of the OAE 1a for the first time from the eastern Tethys. The studied sequence can be attributed to theD. forbesiandD. deshayesiammonite zones of the lower Aptian. The δ13Corgdata can be correlated with published early Aptian carbon isotope records from the western Tethys and the Pacific. A distinctive negative carbon isotope excursion of 2.4‰ in the upper part of the section corresponds to segment C3 of the OAE 1a, and the following positive excursion correlates to segment C4. The absolute values of the carbon isotope ratio in the Gucuo area are higher than those of known sections in the western Tethys and equatorial Pacific. We suggest that diagenetic alteration is the major cause of the higher absolute values in the Gucuo area.
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影响因子：
2.1
作者：
R. Casey;H. Bayliss;Martin I. Simpson
通讯作者：
R. Casey;H. Bayliss;Martin I. Simpson
影响因子：
3
作者：
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通讯作者：
F. Jadoul;F. Berra;E. Garzanti
影响因子：
1.1
作者：
T. Bralower;E. Cobabe;B. Clement;W. Sliter;C. Osburn;J. F. Longoria
通讯作者：
T. Bralower;E. Cobabe;B. Clement;W. Sliter;C. Osburn;J. F. Longoria
影响因子：
2.7
作者：
H. Weissert;E. Erba
通讯作者：
H. Weissert;E. Erba
甘肃省下沟组湖泊地层稳定同位素化学地层学
DOI：
10.1144/sp382.1
发表时间：
2013-05
期刊：
Geological Society, London, Special Publications
影响因子：
--
作者：
Suarez, M. B.;Ludvigson, G.A.;González, L.A.;Al-Suwaidi, A.H.;You, H.-L.
通讯作者：
You, H.-L.