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Isotopic chemostratigraphy of the microbialite-bearing Permian-Triassic boundary section in the Zagros Mountains, Iran
Wang, Wei (王伟); Kano, Akihiro; Okumura, Tomoyo; Ma, Yongsheng; Matsumoto, Ryo; Matsuda, Nilo; Ueno, Katsumi; Chen, Xiaozheng (陈孝政); Kakuwa, Yoshitaka; Gharaie, Mohammad Hosein Mahmudy; Ilkhchi, Mahmud Rahmati
2007-10-15
Source PublicationCHEMICAL GEOLOGY
ISSN0009-2541
Volume244Issue:3-4Pages:708-714
Abstract

Carbon isotopic chemostratigraphy and a Sr-isotope datum provide age-constraints to the uppermost Permian-lowermost Triassic section in central Zagros Mountains, Iran. The 77-m-thick carbonate-dominated section contains two microbialite beds that consist of abiotic carbonate crystals and possible calcimicrobes. The textures resemble those reported from the lowermost Triassic elsewhere, which were likely developed under unusual environmental and ecological conditions after the end-Permian extinction. Our results show that the lower section up to the lower microbialite bed has high delta C-13 values of +3 to +4 parts per thousand, which are typical values for the latest Permian. From 3 m above the base of the lower microbialite, the values abruptly decreases to -0.3 parts per thousand. In the upper section, the delta C-13 curve records another negative excursion and gradual increase to +2.0 parts per thousand. The curve coincides with the global trend from other Permian-Triassic boundary sections, and places the chemostratigraphic boundary within the lower microbialite. The delta C-13 negative excursion postdates geochemical and/or ecological changes that triggered the microbialite development. If the trigger was increased alkalinity by a vast carbon flux, the source carbon should not have significantly light value of delta C-13. (C) 2007 Elsevier B.V. All rights reserved.

KeywordPermian-triassic Boundary Carbon Isotope Chemostratigraphy Microbialites Stromatolites Zagros Iran
DOI10.1016/j.chemgeo.2007.07.018
Language英语
WOS KeywordSouth China ; Mass Extinction ; Oceanic Conditions ; Nanpanjiang Basin ; Carbon ; Evolution ; Seawater ; Province ; Geochemistry ; Excursions
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000250284900022
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/29
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorWang, Wei (王伟)
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China
2.Hiroshima Univ, Dept Earth & Planetary Syst Sci, Higashihiroshima 7398526, Japan
3.So Explorat & Prod Co, Kunming 650200, Peoples R China
4.Univ Tokyo, Dept Earth & Planetary Sci, Tokyo 1130033, Japan
5.Geol Survey Iran, Tehran, Iran
6.Fukuoka Univ, Dept Earth Syst Sci, Fukuoka 8140180, Japan
Recommended Citation
GB/T 7714
Wang, Wei ,Kano, Akihiro,Okumura, Tomoyo,et al. Isotopic chemostratigraphy of the microbialite-bearing Permian-Triassic boundary section in the Zagros Mountains, Iran[J]. CHEMICAL GEOLOGY,2007,244(3-4):708-714.
APA Wang, Wei .,Kano, Akihiro.,Okumura, Tomoyo.,Ma, Yongsheng.,Matsumoto, Ryo.,...&Ilkhchi, Mahmud Rahmati.(2007).Isotopic chemostratigraphy of the microbialite-bearing Permian-Triassic boundary section in the Zagros Mountains, Iran.CHEMICAL GEOLOGY,244(3-4),708-714.
MLA Wang, Wei ,et al."Isotopic chemostratigraphy of the microbialite-bearing Permian-Triassic boundary section in the Zagros Mountains, Iran".CHEMICAL GEOLOGY 244.3-4(2007):708-714.
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