Sedimentary facies and carbon isotopes of the Upper Carboniferous to Lower Permian in South China: Implications for icehouse to greenhouse transition
Sedimentary facies and carbon isotopes of the Upper Carboniferous to Lower Permian in South China: Implications for icehouse to greenhouse transition
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DOI：
10.1016/j.gloplacha.2023.104051
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发表时间：
2023-01
影响因子：
3.9
通讯作者：
Wenli Yang;Jitao Chen;Biao Gao;Yutian Zhong;Xing Huang;Yue Wang;Yu-Ping Qi;Kui Shen;H. Mii;Xiang-Dong Wang;S. Shen
中科院分区：
文献类型：
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作者：
Wenli Yang;Jitao Chen;Biao Gao;Yutian Zhong;Xing Huang;Yue Wang;Yu-Ping Qi;Kui Shen;H. Mii;Xiang-Dong Wang;S. Shen
晚古生代冰期（LPIA）是迄今为止古生代最长的冰室气候状态，记录了自维管植物和复杂陆地生态系统出现以来，冰室气候向温室气候状态的完全转变。因此，对LPIA的冰室-温室转换的综合研究对于理解深时古气候系统的驱动力和机制至关重要，特别是在冰室气候状态下。然而，频繁的陆上暴露和低纬度地区的地层不连续性，由于冰川-海平面变化，从宾夕法尼亚州（晚石炭世）到西苏拉（早二叠世）可能会改变主要的δ 13 C信号，这阻碍了有效的全球相关性。本文选取了罗甸盆地三个碳酸盐岩斜坡序列（那庆、上龙和那绕）进行了详细的沉积学和高分辨率碳酸盐岩δ 13 C研究。δ 13 C的变化与沉积特征相比较，并与全球冰川事件和冰盛期和冰消期大气pCO 2相关。罗甸盆地的δ 13 C具有代表全球平均海水溶解无机碳δ 13 C的潜力，可为今后全球碳循环研究提供参考。
The Late Paleozoic Ice Age (LPIA) is the so far longest-last icehouse climate state during the Phanerozoic, and recorded a complete transition from icehouse to greenhouse climate state since the occurrence of vascular plants and complex terrestrial ecosystem. Therefore, integrated studies on the icehouse-greenhouse transition of the LPIA are critical to understanding the driver and mechanism of the deep-time paleoclimate system, particularly in an icehouse climate state. However, frequent subaerial exposures and stratigraphic discontinuities in low-latitude areas due to glacio-eustatic changes from the Pennsylvanian (Late Carboniferous) to Cisuralian (Early Permian) potentially altered the primary δ13C signals, which hampered a valid global correlation. Here, three carbonate slope successions (Naqing, Shanglong, and Narao) in the Luodian Basin, South China Block, were selected for detailed sedimentology and high-resolution carbonate δ13C study. The variation of δ13C is compared with the sedimentary characteristics and can be correlated with global glacial events and atmosphericpCO2during the apex and deglaciation period of the LPIA. It suggests that δ13C of the Luodian Basin can potentially represent the global mean δ13C of the seawater dissolved inorganic carbon and provide a reference for the future study on global carbon cycling.