globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2017.07.010
论文题名:
Ammonite biostratigraphy and organic carbon isotope chemostratigraphy of the early Aptian oceanic anoxic event (OAE 1a) in the Tethyan Himalaya of southern Tibet
作者: Chen X.; Idakieva V.; Stoykova K.; Liang H.; Yao H.; Wang C.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
语种: 英语
英文关键词: Ammonite zones ; Dark shale ; Early Cretaceous ; Eastern Tethys ; Organic matter
英文摘要: 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 the D. forbesi and D. deshayesi ammonite zones of the lower Aptian. The δ13Corg data 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. © 2017 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68165
Appears in Collections:过去全球变化的重建

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作者单位: State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, China; Dept. of Geology, Paleontology and Fossil Fuels, Sofia University St. Kl. Ohridski, 15 Tsar Osvoboditel Blvd., BG-1504 Sofia, Bulgaria; Dept. of Paleontology, Stratigraphy and Sedimentology, Geological Institute Bulgarian Academy of Sciences, 24 G. Bonchev Str., BG-1113 Sofia, Bulgaria

Recommended Citation:
Chen X.,Idakieva V.,Stoykova K.,et al. Ammonite biostratigraphy and organic carbon isotope chemostratigraphy of the early Aptian oceanic anoxic event (OAE 1a) in the Tethyan Himalaya of southern Tibet[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01
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