globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.epsl.2018.07.026
Scopus记录号: 2-s2.0-85051562662
论文题名:
Global perturbations of carbon cycle during the Triassic–Jurassic transition recorded in the mid-Panthalassa
作者: Fujisaki W.; Matsui Y.; Asanuma H.; Sawaki Y.; Suzuki K.; Maruyama S.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 500
起始页码: 105
结束页码: 116
语种: 英语
英文关键词: bedded cherts ; Central Atlantic Magmatic Provinces (CAMP) ; Japan ; organic carbon isotopes ; redox-sensitive elements ; Triassic–Jurassic boundary
Scopus关键词: Acidification ; Biospherics ; Isotopes ; Stratigraphy ; Volcanic rocks ; bedded cherts ; Carbon isotopes ; Central atlantic magmatic provinces ; Japan ; Jurassic ; Redox sensitives ; Organic carbon ; anoxia ; biosphere ; biostratigraphy ; carbon cycle ; carbon dioxide ; carbon isotope ; chert ; global perspective ; igneous province ; Jurassic ; lithostratigraphy ; ocean acidification ; organic carbon ; paleoatmosphere ; paleoceanography ; paleoenvironment ; redox conditions ; Triassic ; Atlantic Ocean ; Atlantic Ocean (Central)
英文摘要: To examine environmental changes in the biosphere during the Triassic–Jurassic transition, with a particular focus on the global carbon cycle related to Central Atlantic Magmatic Provinces (CAMP) volcanism in the mid-Panthalassa, we established stratigraphic δ13Corg variations using Rhaetian (Late Triassic) to Hettangian (Early Jurassic) shales interbedded within deep-sea cherts in the Katsuyama section in the Mino-Tanba belt, SW Japan. High-resolution record of Rhaetian to Hettangian δ13Corg values in the mid-Panthalassa contain three distinct negative carbon isotopic excursions (NCIEs) before and across the Triassic–Jurassic boundary (TJB): the Rhaetian NCIE1 and NCIE2 show a deviation of 5.0‰ from ca. −24.0‰ to ca. −29.0‰ whereas NCIE3 across the TJB shows a 3.5‰ deviation from ca. −23.5‰ to ca. −27.0‰. Our newly obtained NCIEs in the deep mid-Panthalassa can be correlated with the δ13Corg records in the shallow-marine Tethyan regions (i.e., precursor, initial, and main CIEs), suggesting that three NCIEs in the Tethys and mid-Panthalassa likely reflected the global perturbations of the carbon cycle. Three NCIEs before and across the TJB can be interpreted as the consequence of the multiple CAMP volcanic episodes; i.e., the release of thermogenic methane from organic-rich sediments by CAMP intrusive rocks for NCIE1 and large-scale volcanically derived carbon species for NCIE2 and NCIE3. In addition, progressive increase of atmospheric pCO2 throughout three NCIEs was possibly attributed to accumulation of volcanically derived CO2 from multiple CAMP eruptions, which resulted in the development of ocean acidification across the TJB. On the other hand, in view of the oxic conditions in the deep mid-Panthalassa during three NCIEs, the development of coeval oceanic anoxic–euxinic conditions was restricted solely to shallow-marine regions. Therefore, ocean acidification together with localized shallow-marine anoxia acted as environmental stresses on the biosphere, which eventually resulted in the severe biotic crisis at the end of the Triassic. © 2018 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/109691
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Research and Development (R&D) Center for Submarine Resources, Japan Agency for Marine–Earth Science and Technology (JAMSTEC), 2-15, Natsushima-cho, Yokosuka-city, Kanagawa 237-0061, Japan; Project Team for Development of New-Generation Research Protocol for Submarine Resources, Japan Agency for Marine–Earth Science and Technology (JAMSTEC), 2-15, Natsushima-cho, Yokosuka-city, Kanagawa 237-0061, Japan; Department of Subsurface Geobiological Analysis and Research (D-SUGAR), Japan Agency for Marine–Earth Science and Technology (JAMSTEC), 2-15, Natsushima-cho, Yokosuka-city, Kanagawa 237-0061, Japan; Geochemical Research Center, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-0033, Japan; Department of Earth Science and Astronomy, The University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo, 153-8902, Japan; Earth-Life Science Institute, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo, 152-8550, Japan

Recommended Citation:
Fujisaki W.,Matsui Y.,Asanuma H.,et al. Global perturbations of carbon cycle during the Triassic–Jurassic transition recorded in the mid-Panthalassa[J]. Earth and Planetary Science Letters,2018-01-01,500
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