globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2013.07.008
论文题名:
Do the large carbon isotopic excursions in terrestrial organic matter across Paleocene-Eocene boundary in India indicate intensification of tropical precipitation?
作者: Samanta A.; Bera M.K.; Ghosh R.; Bera S.; Filley T.; Pande K.; Rathore S.S.; Rai J.; Sarkar A.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 387
起始页码: 91
结束页码: 103
语种: 英语
英文关键词: Carbon isotope excursion ; Eocene hyperthermals ; Hydrological cycle ; Tropical terrestrial Paleocene-Eocene Thermal Maximum
英文摘要: Five distinct transient warming (hyperthermal) events (Paleocene-Eocene Thermal Maximum [PETM], H1/ETM2/ELMO, H2, I1, and I2), marked by negative carbon isotope excursions (CIEs) occurred between Late Paleocene and Early Eocene (~56 to 52Ma) interval. However, not many records of either the PETM or definitive Early Eocene Hyperthermals (EEHs) are yet available from terrestrial realm in the tropics except two neo-tropical sections of Colombia and Venezuela (Jaramillo et al., 2010). Therefore, response of the tropical biosphere to these warming events is not very well known. Here we report high resolution carbon isotope (δ13C) chemostratigraphy, biomarker, calcareous nannofossils, and pollen data from the Cambay shale Formation of Western India (paleolatitude~5°S), which show complete preservation of all the above CIE events including the PETM, hitherto unknown from tropical terrestrial record. Comparatively larger magnitudes of CIEs for all the hyperthermal events (the PETM and EEHs) point towards a possible intensification of precipitation during the PETM and all the early Eocene hyperthermal/CIE events. This inference is supported by data of lignin phenols and presence of tropical rain forest elements spanning the entire time period ~56-52Ma and suggest that higher organic burial and soil erosion favored deposition of thick lignitic seams as a consequence of high tropical precipitation. © 2013 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/69621
Appears in Collections:过去全球变化的重建

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作者单位: Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur 721 302, India; Indian Institute of Science Education and Research, Kolkata 741 252, India; Birbal Sahni Institute of Palaeobotany, Lucknow 226007, India; Department of Botany, Calcutta University, Kolkata 700 019, India; Department of Earth and Atmospheric Sciences, Purdue University, West Lafayette 47907, United States; Purdue Climate Change Research Center, Purdue University, West Lafayette 47907, United States; Department of Earth Sciences, Indian Institute of Technology, Mumbai 400076, India; KDM Institute of Petroleum Exploration, Dehradun 248195, India

Recommended Citation:
Samanta A.,Bera M.K.,Ghosh R.,et al. Do the large carbon isotopic excursions in terrestrial organic matter across Paleocene-Eocene boundary in India indicate intensification of tropical precipitation?[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,387
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