| Fossil charcoal from the Middle Jurassic of the Ordos Basin, China and its paleoatmospheric implications |
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| 作者姓名： | Lawrence H.Tanner Alesha C.Morabito |
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| 作者单位： | Department of Biological Sciences,Le Moyne College,Syracuse,NY 13214,USA |
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| 基金项目： | Tanner received generous financial support from Le Moyne College for the travel to China that made this study possible，the Nalional Basic Research Program of China (973 Program，National Natural Science Foundation of China，the State Key Laboratory of Palaeobiology and Stratigraphy，Nanjing Institute of Geology and Palaeontology Programs |
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| 摘 要： | The Yan'an Formation of the Ordos Basin is a sequence of four members,consisting of siliciclastic sediments deposited in alluvial,lacustrine and mire settings during the Middle Jurassic.Samples collect...
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| 关 键 词： | 鄂尔多斯盆地 中侏罗世 木炭 化石 中国 地球化学模型 沉积物 沼泽湿地 |
| 收稿时间： | 13 May 2011 |
http://www.sciencedirect.com/science/article/pii/S1674987111001253 |
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| Lawrence H.Tanner,Alesha C.Morabito.Fossil charcoal from the Middle Jurassic of the Ordos Basin, China and its paleoatmospheric implications[J].Geoscience Frontiers,2012,3(4):493-502. |
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| Authors: | Lawrence H Tanner Xin Wang Alesha C Morabito |
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| Institution: | [1]Department of Biological Sciences, Le Moyne College, Syracuse, NY 13214, USA [2]State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of SciencesNanjing 210008, China |
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| Abstract: | The Yan’an Formation of the Ordos Basin is a sequence of four members,consisting of siliciclastic sediments deposited in alluvial,lacustrine and mire settings during the Middle Jurassic. Samples collected from Members Two and Four contain abundant blackened plant material identified through standard analytical techniques as fusain(fossil charcoal).The occurrence of fusain in fluvial sandstones at multiple horizons in the outcrops,combined with the previously reported high concentration of inertinite in the coals of Member One,indicates that paleowildhre was a common occurrence in the Ordos Basin during Yan’an deposition.Sedimentary evidence from Yan’an outcrops suggests that the paleoclimate was seasonal during deposition of Members Two through Four,which may have contributed to the wildfire frequency.The presence of fusain in the Yan’an Formation indicates that atmospheric oxygen levels were clearly above the minimum required for sustained combustion during the Middle Jurassic.This conclusion contradicts previous geochemical models for paleoatmospheric composition, but supports more recent studies. |
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| Keywords: | Fusain Paleoatmospheric oxygen Wildfire Ordos Basin Yah'an Formation Charcoal |
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