Biostratigraphy, carbon isotopes and cyclostratigraphy of the Albian-Cenomanian transition and Oceanic Anoxic Event 1d in southern Tibet
Biostratigraphy, carbon isotopes and cyclostratigraphy of the Albian-Cenomanian transition and Oceanic Anoxic Event 1d in southern Tibet
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藏南阿尔布-塞诺曼期转变和第1d海洋缺氧事件的生物地层、碳同位素和旋回地层
DOI：
10.1016/j.palaeo.2018.03.005
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发表时间：
2018-06
期刊：
影响因子：
--
通讯作者：
Weissert Helmut
中科院分区：
文献类型：
--
作者：
Yao Hanwei;Chen Xi;Melinte-Dobrinescu Mihaela C.;Wu Huaichun;Liang Huimin;Weissert Helmut
在阿尔比亚和塞诺马期，地球经历了深刻的气候和海洋变化，在全球范围内的沉积序列中记录了这些变化。在西特提斯、东太平洋和北大西洋已经建立了跨越这一时间间隔的碳同位素记录，但在东特提斯海洋还没有建立。本文介绍了藏南尤夏东部特提斯剖面阿尔卑斯-西诺木期最高-最低地层的生物地层学、化学地层学和旋回地层学特征。根据钙质超微化石生物带和块体岩石δ13C曲线，确定了阿尔比亚-塞诺马期界线，并与西特提斯和大西洋进行了对比。在油霞部分，δ13C值的范围约为0‰到+1.3‰(−0.03‰到+1.31‰)。通过与其他剖面的对比，在ACBI碳同位素曲线上划分出a、b、c和d四个子事件。根据碳酸盐含量的光谱分析，我们识别出米兰科维奇短偏心(~100 KYR)和进动(22.2KYR)旋回，表明轨道变化调制了沉积过程。在东部特提斯洋，赤道大洋的持续时间估计为311 KYR，而OAE1D的持续时间为233KYR，这与根据大西洋记录计算的持续时间一致。
During the Albian and Cenomanian, the Earth underwent profound climatic and oceanographic changes that were recorded in sedimentary successions on a global scale. Carbon isotope records spanning this time interval have been established in the western Tethys, eastern Pacific and North Atlantic Oceans, but not yet in the eastern Tethys Ocean. In this paper, we present biostratigraphic, chemostratigraphic and cyclostratigraphic characteristics of the uppermost Albian–lowermost Cenomanian in an eastern Tethyan section (Youxia, southern Tibet). Based on calcareous nannofossil biozones and the bulk rock δ13C curve, the Albian-Cenomanian boundary interval (ACBI) was identified and correlated to the western Tethys and Atlantic Oceans. In the Youxia section, δ13C values range from approximately 0‰ to +1.3‰ (−0.03‰ to +1.31‰). Four subevents (a, b, c and d) were distinguished in the ACBI carbon isotope curve via correlation with other sections. Based on a spectral analysis of the carbonate content, we recognized Milankovitch short eccentricity (~100 kyr) and precession (22.2 kyr) cycles, suggesting that orbital variations modulated depositional processes. The duration of the ACBI was estimated at ~311 kyr, while OAE 1d lasted for ~233 kyr in the eastern Tethys Ocean, consistent with the duration calculated from Atlantic Ocean records.
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影响因子：
3.5
作者：
S. Wohlwend;R. Celestino;D. Reháková;S. Huck;H. Weissert
通讯作者：
S. Wohlwend;R. Celestino;D. Reháková;S. Huck;H. Weissert
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
发表时间：
2017-11
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
Chen Xi;Idakieva Vyara;Stoykova Kristalina;Liang Huiming;Yao Hanwei;Wang Chengshan
通讯作者：
Wang Chengshan
影响因子：
3.1
作者：
W. Kennedy;I. Walaszczyk;W. A. Cobban
通讯作者：
W. Kennedy;I. Walaszczyk;W. A. Cobban
影响因子：
1.2
作者：
M. Adabi
通讯作者：
M. Adabi
DOI：
10.1016/s0031-0182(99)00009-7
发表时间：
1999-06
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
C. Paul;M. Lamolda;S. Mitchell;M. Vaziri;A. Gorostidi;J. Marshall
通讯作者：
C. Paul;M. Lamolda;S. Mitchell;M. Vaziri;A. Gorostidi;J. Marshall