Structure and magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum
The Paleocene-Eocene Thermal Maximum (PETM) was a geologically rapid and transient warming event that occurred ca. 56 million years ago (Ma). It was associated with a pronounced negative carbon isotope excursion (CIE) and with profound changes in the atmosphere, hydrosphere and biosphere. This event...
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ftchinacscnigpas:oai:ir.nigpas.ac.cn:332004/20513 2023-05-15T17:12:09+02:00 Structure and magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum Zhang, Qinghai Wendler, Ines Xu, Xiaoxia Willems, Helmut Ding, Lin 2017-06-01 http://ir.nigpas.ac.cn/handle/332004/20513 https://doi.org/10.1016/j.gr.2017.02.016 英语 eng ELSEVIER SCIENCE BV GONDWANA RESEARCH http://ir.nigpas.ac.cn/handle/332004/20513 doi:10.1016/j.gr.2017.02.016 PETM Tibet Bulk carbonate CIE profile CIE magnitude METHANE HYDRATE CENTRAL CHINA RECORD RELEASE SEAWATER CLIMATE OCEAN END SR STRATIGRAPHY Geology Geosciences Multidisciplinary 期刊论文 2017 ftchinacscnigpas https://doi.org/10.1016/j.gr.2017.02.016 2019-08-14T12:44:42Z The Paleocene-Eocene Thermal Maximum (PETM) was a geologically rapid and transient warming event that occurred ca. 56 million years ago (Ma). It was associated with a pronounced negative carbon isotope excursion (CIE) and with profound changes in the atmosphere, hydrosphere and biosphere. This event reflects injections of large amounts of carbon into the atmosphere-ocean system, but, whether single or multiple episodes of carbon release caused this event is uncertain. Here, we present carbon isotope data of bulk carbonate from two parallel limestone sections at Tingri (south Tibet), where the limestone was deposited on a tropical carbonate ramp during the PETM. Carbon isotope data of bulk carbonate from both sections are almost identical, displaying an expanded stepped CIE profile with large magnitude. The stepped CIE profile consists of three discrete intervals of decreasing carbon isotope values, which can be correlated on an inter-regional scale between sections from different depositional environments (lake, carbonate ramp, continental slope, and open ocean). The consistency of these correlations implies occurrence of at least three carbon releases within the CIE and indicates complex processes of carbon injection during the PETM. Moreover, the CIE magnitude of similar to 7 parts per thousand recorded at Tingri is tentatively interpreted to reflect carbon isotope changes in the atmosphere and the surface ocean, which is larger than the generally accepted value of similar to 4 parts per thousand but is still within the range of some previous records. (C) 2017 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved. Report Methane hydrate Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) Gondwana Research 46 114 123 |
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Open Polar |
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Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacscnigpas |
language |
English |
topic |
PETM Tibet Bulk carbonate CIE profile CIE magnitude METHANE HYDRATE CENTRAL CHINA RECORD RELEASE SEAWATER CLIMATE OCEAN END SR STRATIGRAPHY Geology Geosciences Multidisciplinary |
spellingShingle |
PETM Tibet Bulk carbonate CIE profile CIE magnitude METHANE HYDRATE CENTRAL CHINA RECORD RELEASE SEAWATER CLIMATE OCEAN END SR STRATIGRAPHY Geology Geosciences Multidisciplinary Zhang, Qinghai Wendler, Ines Xu, Xiaoxia Willems, Helmut Ding, Lin Structure and magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum |
topic_facet |
PETM Tibet Bulk carbonate CIE profile CIE magnitude METHANE HYDRATE CENTRAL CHINA RECORD RELEASE SEAWATER CLIMATE OCEAN END SR STRATIGRAPHY Geology Geosciences Multidisciplinary |
description |
The Paleocene-Eocene Thermal Maximum (PETM) was a geologically rapid and transient warming event that occurred ca. 56 million years ago (Ma). It was associated with a pronounced negative carbon isotope excursion (CIE) and with profound changes in the atmosphere, hydrosphere and biosphere. This event reflects injections of large amounts of carbon into the atmosphere-ocean system, but, whether single or multiple episodes of carbon release caused this event is uncertain. Here, we present carbon isotope data of bulk carbonate from two parallel limestone sections at Tingri (south Tibet), where the limestone was deposited on a tropical carbonate ramp during the PETM. Carbon isotope data of bulk carbonate from both sections are almost identical, displaying an expanded stepped CIE profile with large magnitude. The stepped CIE profile consists of three discrete intervals of decreasing carbon isotope values, which can be correlated on an inter-regional scale between sections from different depositional environments (lake, carbonate ramp, continental slope, and open ocean). The consistency of these correlations implies occurrence of at least three carbon releases within the CIE and indicates complex processes of carbon injection during the PETM. Moreover, the CIE magnitude of similar to 7 parts per thousand recorded at Tingri is tentatively interpreted to reflect carbon isotope changes in the atmosphere and the surface ocean, which is larger than the generally accepted value of similar to 4 parts per thousand but is still within the range of some previous records. (C) 2017 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved. |
format |
Report |
author |
Zhang, Qinghai Wendler, Ines Xu, Xiaoxia Willems, Helmut Ding, Lin |
author_facet |
Zhang, Qinghai Wendler, Ines Xu, Xiaoxia Willems, Helmut Ding, Lin |
author_sort |
Zhang, Qinghai |
title |
Structure and magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum |
title_short |
Structure and magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum |
title_full |
Structure and magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum |
title_fullStr |
Structure and magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum |
title_full_unstemmed |
Structure and magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum |
title_sort |
structure and magnitude of the carbon isotope excursion during the paleocene-eocene thermal maximum |
publisher |
ELSEVIER SCIENCE BV |
publishDate |
2017 |
url |
http://ir.nigpas.ac.cn/handle/332004/20513 https://doi.org/10.1016/j.gr.2017.02.016 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
GONDWANA RESEARCH http://ir.nigpas.ac.cn/handle/332004/20513 doi:10.1016/j.gr.2017.02.016 |
op_doi |
https://doi.org/10.1016/j.gr.2017.02.016 |
container_title |
Gondwana Research |
container_volume |
46 |
container_start_page |
114 |
op_container_end_page |
123 |
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1766068944505929728 |