Multiple glacio-eustatic cycles and associated environmental changes through the Hirnantian (Late Ordovician) in South China
The Hirnantian glaciation, which was the first in the Phanerozoic to occur with elevated CO2 levels, caused severe mass extinctions and disrupted biogeochemical cycling in the latest Ordovician. Previous research that aimed at exploring the triggers and consequences (both abiotic and biotic) of this...
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ftchinacscnigpas:oai:ir.nigpas.ac.cn:332004/39998 2023-05-15T16:41:34+02:00 Multiple glacio-eustatic cycles and associated environmental changes through the Hirnantian (Late Ordovician) in South China Li, Chao Zhang, Junpeng Li, Wenjie Botting, Joseph Chen, Qing Fan, Junxuan Zhang, Yuandong 2021-12-01 http://ir.nigpas.ac.cn/handle/332004/39998 https://doi.org/10.1016/j.gloplacha.2021.103668 英语 eng ELSEVIER GLOBAL AND PLANETARY CHANGE http://ir.nigpas.ac.cn/handle/332004/39998 doi:10.1016/j.gloplacha.2021.103668 Hirnantian glaciation High-resolution XRF scanning Kuanyinchiao Bed Major and trace elements Glacio-eustatic cycle Redox landscape SILURIAN BOUNDARY MASS EXTINCTION SEQUENCE STRATIGRAPHY DISTRIBUTION PATTERN REDOX CONDITIONS ORGANIC-CARBON SEA-LEVEL GLACIATION SHALES GUIZHOU Physical Geography Geology Geography Physical Geosciences Multidisciplinary 期刊论文 2021 ftchinacscnigpas https://doi.org/10.1016/j.gloplacha.2021.103668 2021-12-17T01:08:46Z The Hirnantian glaciation, which was the first in the Phanerozoic to occur with elevated CO2 levels, caused severe mass extinctions and disrupted biogeochemical cycling in the latest Ordovician. Previous research that aimed at exploring the triggers and consequences (both abiotic and biotic) of this glacial event have largely been based on condensed or incomplete sections. However, there is much debate over the detailed glacio-eustatic processes, and especially over the possible existence and characterization of multiple glacial cycles. Herein we conduct high-resolution geochemical analyses (via XRF core scanning and ICP-OES/MS) and a sedimentological study of three continuous upper Katian - lower Rhuddanian drill cores (Well Huangge-1, Well Shuanghe-1 and Well Yiwan-1), which represent a combination of nearshore and offshore facies in South China. The geochemical and sedimentological evidences reveal for the first time three glacio-eustatic cycles encompassed within a major sea level cycle through the upper Katian and Hirnantian. Each glacio-eustatic cycle comprises a combination of regressive and transgressive systems tracts, with the third one denoting the largest sea level fall and the glacial maximum. This pattern of sea level changes can be correlated with both the glacial sedimentary records and geochemical signals in North Gondwana, Laurentia and Baltica. These glacio-eustatic changes likely led to perturbations in regional marine nutrient cycling and formed a redox landscape that is depicted herein as somewhat different from previous models. We also present the glacio-eustatic effects at a basin scale, and a refined constraint for the tempo of polar ice sheet advances and retreats. It also calls for a re-evaluation of the mechanisms whereby a multi-cycle glaciation led to the Hirnantian biotic crisis, a relationship that may be much more complicated than the simplified cause-and-effect relationship proposed before. Report Ice Sheet Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) Global and Planetary Change 207 103668 |
institution |
Open Polar |
collection |
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacscnigpas |
language |
English |
topic |
Hirnantian glaciation High-resolution XRF scanning Kuanyinchiao Bed Major and trace elements Glacio-eustatic cycle Redox landscape SILURIAN BOUNDARY MASS EXTINCTION SEQUENCE STRATIGRAPHY DISTRIBUTION PATTERN REDOX CONDITIONS ORGANIC-CARBON SEA-LEVEL GLACIATION SHALES GUIZHOU Physical Geography Geology Geography Physical Geosciences Multidisciplinary |
spellingShingle |
Hirnantian glaciation High-resolution XRF scanning Kuanyinchiao Bed Major and trace elements Glacio-eustatic cycle Redox landscape SILURIAN BOUNDARY MASS EXTINCTION SEQUENCE STRATIGRAPHY DISTRIBUTION PATTERN REDOX CONDITIONS ORGANIC-CARBON SEA-LEVEL GLACIATION SHALES GUIZHOU Physical Geography Geology Geography Physical Geosciences Multidisciplinary Li, Chao Zhang, Junpeng Li, Wenjie Botting, Joseph Chen, Qing Fan, Junxuan Zhang, Yuandong Multiple glacio-eustatic cycles and associated environmental changes through the Hirnantian (Late Ordovician) in South China |
topic_facet |
Hirnantian glaciation High-resolution XRF scanning Kuanyinchiao Bed Major and trace elements Glacio-eustatic cycle Redox landscape SILURIAN BOUNDARY MASS EXTINCTION SEQUENCE STRATIGRAPHY DISTRIBUTION PATTERN REDOX CONDITIONS ORGANIC-CARBON SEA-LEVEL GLACIATION SHALES GUIZHOU Physical Geography Geology Geography Physical Geosciences Multidisciplinary |
description |
The Hirnantian glaciation, which was the first in the Phanerozoic to occur with elevated CO2 levels, caused severe mass extinctions and disrupted biogeochemical cycling in the latest Ordovician. Previous research that aimed at exploring the triggers and consequences (both abiotic and biotic) of this glacial event have largely been based on condensed or incomplete sections. However, there is much debate over the detailed glacio-eustatic processes, and especially over the possible existence and characterization of multiple glacial cycles. Herein we conduct high-resolution geochemical analyses (via XRF core scanning and ICP-OES/MS) and a sedimentological study of three continuous upper Katian - lower Rhuddanian drill cores (Well Huangge-1, Well Shuanghe-1 and Well Yiwan-1), which represent a combination of nearshore and offshore facies in South China. The geochemical and sedimentological evidences reveal for the first time three glacio-eustatic cycles encompassed within a major sea level cycle through the upper Katian and Hirnantian. Each glacio-eustatic cycle comprises a combination of regressive and transgressive systems tracts, with the third one denoting the largest sea level fall and the glacial maximum. This pattern of sea level changes can be correlated with both the glacial sedimentary records and geochemical signals in North Gondwana, Laurentia and Baltica. These glacio-eustatic changes likely led to perturbations in regional marine nutrient cycling and formed a redox landscape that is depicted herein as somewhat different from previous models. We also present the glacio-eustatic effects at a basin scale, and a refined constraint for the tempo of polar ice sheet advances and retreats. It also calls for a re-evaluation of the mechanisms whereby a multi-cycle glaciation led to the Hirnantian biotic crisis, a relationship that may be much more complicated than the simplified cause-and-effect relationship proposed before. |
format |
Report |
author |
Li, Chao Zhang, Junpeng Li, Wenjie Botting, Joseph Chen, Qing Fan, Junxuan Zhang, Yuandong |
author_facet |
Li, Chao Zhang, Junpeng Li, Wenjie Botting, Joseph Chen, Qing Fan, Junxuan Zhang, Yuandong |
author_sort |
Li, Chao |
title |
Multiple glacio-eustatic cycles and associated environmental changes through the Hirnantian (Late Ordovician) in South China |
title_short |
Multiple glacio-eustatic cycles and associated environmental changes through the Hirnantian (Late Ordovician) in South China |
title_full |
Multiple glacio-eustatic cycles and associated environmental changes through the Hirnantian (Late Ordovician) in South China |
title_fullStr |
Multiple glacio-eustatic cycles and associated environmental changes through the Hirnantian (Late Ordovician) in South China |
title_full_unstemmed |
Multiple glacio-eustatic cycles and associated environmental changes through the Hirnantian (Late Ordovician) in South China |
title_sort |
multiple glacio-eustatic cycles and associated environmental changes through the hirnantian (late ordovician) in south china |
publisher |
ELSEVIER |
publishDate |
2021 |
url |
http://ir.nigpas.ac.cn/handle/332004/39998 https://doi.org/10.1016/j.gloplacha.2021.103668 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
GLOBAL AND PLANETARY CHANGE http://ir.nigpas.ac.cn/handle/332004/39998 doi:10.1016/j.gloplacha.2021.103668 |
op_doi |
https://doi.org/10.1016/j.gloplacha.2021.103668 |
container_title |
Global and Planetary Change |
container_volume |
207 |
container_start_page |
103668 |
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1766032008444641280 |