暁新世-始新世温暖化極大事件(PETM)研究の最前線 : 炭素同位体比層序学の貢献(<特集>顕生代の環境擾乱イベントとその解析)
The Paleocene-Eocene thermal maximum (PETM) is marked by a large negative carbon isotope excursion (CIE) and massive seafloor carbonate dissolution. Both phenomena are thought to have been caused by a sudden release of a large mass of carbon. The step-like nature of the CIE onset combined with the C...
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日本有機地球化学会 = Japanese Association of Organic Geochemists
2008
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ftkanazawauninii:oai:kanazawa-u.repo.nii.ac.jp:00010561 2023-09-05T13:22:41+02:00 暁新世-始新世温暖化極大事件(PETM)研究の最前線 : 炭素同位体比層序学の貢献(<特集>顕生代の環境擾乱イベントとその解析) 長谷川 卓 2008-12-30 http://hdl.handle.net/2297/32230 https://kanazawa-u.repo.nii.ac.jp/?action=repository_uri&item_id=10561 https://kanazawa-u.repo.nii.ac.jp/?action=repository_action_common_download&item_id=10561&item_no=1&attribute_id=26&file_no=1 ja jpn 日本有機地球化学会 = Japanese Association of Organic Geochemists http://ci.nii.ac.jp/naid/110007504597/ http://www.ogeochem.jp/ https://kanazawa-u.repo.nii.ac.jp/?action=repository_uri&item_id=10561 http://hdl.handle.net/2297/32230 Researches in organic geochemistry, 23-24, 43-56(2008-12-30) 1344-9915 AA11889471 https://kanazawa-u.repo.nii.ac.jp/?action=repository_action_common_download&item_id=10561&item_no=1&attribute_id=26&file_no=1 日本有機地球化学会 | 本文データは学協会の許諾に基づきCiNiiから複製したものである Journal Article 2008 ftkanazawauninii 2023-08-17T05:51:48Z The Paleocene-Eocene thermal maximum (PETM) is marked by a large negative carbon isotope excursion (CIE) and massive seafloor carbonate dissolution. Both phenomena are thought to have been caused by a sudden release of a large mass of carbon. The step-like nature of the CIE onset combined with the CIE magnitude has been explained by multiple dissociation of methane clathrate as the primary source of carbon. The natures of onset and the magnitude of CIE, however, are different between marine and terrestrial records implying potential artifacts in either or both records. Recently, the carbon isotope stratigraphy based on various techniques including compound-specific isotope analysis on terrestrial and marine biomarkers, single specimen analysis on surface-dwelling planktonic foraminifera revealed that 'actual' CIE is as large as 4‰ or larger, and the onset of the CIE was geologically instantaneous. These results demonstrated that the CIE magnitude (2-3‰) previously applied to estimate the mass of carbon released during the PETM was considerably underestimated and that abrupt input of ^<13>C-depleted carbon to the ocean-atmosphere system. Forthcoming high-resolution studies on the PETM with precise inter-regional correlation would provide a unique opportunity for comparative research of global warming between PETM period and the present. Article in Journal/Newspaper Planktonic foraminifera Kanazawa University Repository for Academic Resources (KURA) |
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Open Polar |
collection |
Kanazawa University Repository for Academic Resources (KURA) |
op_collection_id |
ftkanazawauninii |
language |
Japanese |
description |
The Paleocene-Eocene thermal maximum (PETM) is marked by a large negative carbon isotope excursion (CIE) and massive seafloor carbonate dissolution. Both phenomena are thought to have been caused by a sudden release of a large mass of carbon. The step-like nature of the CIE onset combined with the CIE magnitude has been explained by multiple dissociation of methane clathrate as the primary source of carbon. The natures of onset and the magnitude of CIE, however, are different between marine and terrestrial records implying potential artifacts in either or both records. Recently, the carbon isotope stratigraphy based on various techniques including compound-specific isotope analysis on terrestrial and marine biomarkers, single specimen analysis on surface-dwelling planktonic foraminifera revealed that 'actual' CIE is as large as 4‰ or larger, and the onset of the CIE was geologically instantaneous. These results demonstrated that the CIE magnitude (2-3‰) previously applied to estimate the mass of carbon released during the PETM was considerably underestimated and that abrupt input of ^<13>C-depleted carbon to the ocean-atmosphere system. Forthcoming high-resolution studies on the PETM with precise inter-regional correlation would provide a unique opportunity for comparative research of global warming between PETM period and the present. |
format |
Article in Journal/Newspaper |
author |
長谷川 卓 |
spellingShingle |
長谷川 卓 暁新世-始新世温暖化極大事件(PETM)研究の最前線 : 炭素同位体比層序学の貢献(<特集>顕生代の環境擾乱イベントとその解析) |
author_facet |
長谷川 卓 |
author_sort |
長谷川 卓 |
title |
暁新世-始新世温暖化極大事件(PETM)研究の最前線 : 炭素同位体比層序学の貢献(<特集>顕生代の環境擾乱イベントとその解析) |
title_short |
暁新世-始新世温暖化極大事件(PETM)研究の最前線 : 炭素同位体比層序学の貢献(<特集>顕生代の環境擾乱イベントとその解析) |
title_full |
暁新世-始新世温暖化極大事件(PETM)研究の最前線 : 炭素同位体比層序学の貢献(<特集>顕生代の環境擾乱イベントとその解析) |
title_fullStr |
暁新世-始新世温暖化極大事件(PETM)研究の最前線 : 炭素同位体比層序学の貢献(<特集>顕生代の環境擾乱イベントとその解析) |
title_full_unstemmed |
暁新世-始新世温暖化極大事件(PETM)研究の最前線 : 炭素同位体比層序学の貢献(<特集>顕生代の環境擾乱イベントとその解析) |
title_sort |
暁新世-始新世温暖化極大事件(petm)研究の最前線 : 炭素同位体比層序学の貢献(<特集>顕生代の環境擾乱イベントとその解析) |
publisher |
日本有機地球化学会 = Japanese Association of Organic Geochemists |
publishDate |
2008 |
url |
http://hdl.handle.net/2297/32230 https://kanazawa-u.repo.nii.ac.jp/?action=repository_uri&item_id=10561 https://kanazawa-u.repo.nii.ac.jp/?action=repository_action_common_download&item_id=10561&item_no=1&attribute_id=26&file_no=1 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
http://ci.nii.ac.jp/naid/110007504597/ http://www.ogeochem.jp/ https://kanazawa-u.repo.nii.ac.jp/?action=repository_uri&item_id=10561 http://hdl.handle.net/2297/32230 Researches in organic geochemistry, 23-24, 43-56(2008-12-30) 1344-9915 AA11889471 https://kanazawa-u.repo.nii.ac.jp/?action=repository_action_common_download&item_id=10561&item_no=1&attribute_id=26&file_no=1 |
op_rights |
日本有機地球化学会 | 本文データは学協会の許諾に基づきCiNiiから複製したものである |
_version_ |
1776203203809902592 |