Lacustrine sedimentary record of early Aptian carbon cycle perturbation in western Liaoning,China |
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| Institution: | 1. Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China;2. Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10968, USA;3. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China;4. Chinese Academy of Sciences Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;1. Ruhr-Universität Bochum, Institut für Geologie, Mineralogie und Geophysik, D-44870 Bochum, Germany;2. Geertekerkhof 14bis, 3511 XC Utrecht, The Netherlands;3. Petroleum Geosciences, The Petroleum Institute, PO Box 2533, Abu Dhabi, United Arab Emirates;1. State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing, Jiangsu 210023, China;2. Wuxi Institute of Petroleum Geology, SINOPEC Exploration and Production Research Institute, Wuxi 214151, China;3. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China;1. Istituto per l''Ambiente Marino Costiero, Consiglio Nazionale delle Ricerche (IAMC-CNR), Capo Granitola, Via del Mare 3, 91021 Campobello di Mazara (Tp), Italy;2. Dipartimento di Scienze della Terra, della Vita e dell''Ambiente, Università degli Studi “Carlo Bo”, Campo Scientifico “E. Mattei”, Localita'' Crocicchia, 61029 Urbino, Italy;3. Institut des Sciences de la Terre de Paris, Sorbonne Universités, UPMC-Univ. Paris 06, CNRS, UMR 7193, 4 place Jussieu, 75252 Paris Cedex 05, France;4. Istituto per l''Ambiente Marino Costiero, Consiglio Nazionale delle Ricerche (IAMC-CNR), Napoli, Calata Porta di Massa (Interno Porto di Napoli), 80133 Napoli, Italy;1. Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering/South China Sea Bioresource Exploitation and Utilization Collaborative Innovation Center, School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510006, China;2. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;3. Guangdong Ocean University, Zhanjiang 524088, China |
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| Abstract: | The early Aptian abrupt carbon isotope excursion in marine carbonate and sedimentary organic matter reflects a major perturbation in the global carbon cycle. However, until now almost all the evidences of this event came from marine deposits. Here we present organic-carbon isotope (δ13Corg) data from the non-marine Jehol Group in western Liaoning, China. The lacustrine δ13Corg curve is marked by a relative long-lasting δ13Corg minimum followed by two stages of positive δ13Corg excursions that are well correlated with contemporaneous marine records. The carbon isotope correlation shows that the lacustrine strata of the Jehol Group were deposited at the same time of the early Aptian Oceanic Anoxic Event (OAE1a). The relative long-lasting δ13Corg minimum supports the hypothesis that volcanic CO2 emission may have played the main role in triggering the negative δ13C excursion and global warming at the onset of this event. In addition, the onset of δ13Corg minimum is concomitant with the radiation of the Jehol Biota, implying that the evolutionary radiation of the Jehol Biota may have been closely related with the increase in atmospheric CO2 and temperature. |
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| Keywords: | Early Aptian Jehol Group Carbon cycle perturbation Lacustrine deposits Western Liaoning |
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