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Geochemical Changes in the Late Ordovician to Early Silurian Interval in the Northern Margin of the Upper Yangtze Platform, Southern China: Implications for Hydrothermal Influences and Paleocean Redox Circumstances
[Image: see text] A comprehensive chemostratigraphic study, including evaluation of rare earth elements and trace elements, was conducted to explain the paleoenvironments of the northern margin of the Upper Yangtze Platform. Trace elements, like Ba, U, V, Cu, and Zn, tended to be more abundant in th...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2023
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10099134/ https://www.ncbi.nlm.nih.gov/pubmed/37065066 http://dx.doi.org/10.1021/acsomega.3c00277 |
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author | Fu, Xiang Liu, Xuan Xiong, Shuzhen Li, Xu Wu, Qixuan Xiao, Bin |
author_facet | Fu, Xiang Liu, Xuan Xiong, Shuzhen Li, Xu Wu, Qixuan Xiao, Bin |
author_sort | Fu, Xiang |
collection | PubMed |
description | [Image: see text] A comprehensive chemostratigraphic study, including evaluation of rare earth elements and trace elements, was conducted to explain the paleoenvironments of the northern margin of the Upper Yangtze Platform. Trace elements, like Ba, U, V, Cu, and Zn, tended to be more abundant in these formations than in the upper continental crust. The authigenic abundances of Al-normalized U and V, as well as the Th/U and V/Sc ratios, were used as indicators of the redox circumstances. In the Nanjiang area, the redox circumstances of the bottom water during the Ordovician–Silurian transition changed from oxic in the Late Katian to slightly anoxic in the Hirnantian and then gradually became anoxic in the Early Rhuddanian. In the Chengkou area, the redox circumstances of the bottom water during the Ordovician–Silurian transition abruptly changed from oxic in the Late Katian to strongly anoxic in the Hirnantian and continued to become more anoxic until the Rhuddanian. The total organic carbon concentrations were well correlated with the redox circumstances of the bottom water. We conclude that the transient hydrothermal activity was not widely distributed during the Late Ordovician–Early Silurian transition, and it might also have been only a local event in the Upper Yangtze Platform. The enrichment in organic matter was mostly sourced from the photic zone and was governed by the redox circumstances of the bottom water. |
format | Online Article Text |
id | pubmed-10099134 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-100991342023-04-14 Geochemical Changes in the Late Ordovician to Early Silurian Interval in the Northern Margin of the Upper Yangtze Platform, Southern China: Implications for Hydrothermal Influences and Paleocean Redox Circumstances Fu, Xiang Liu, Xuan Xiong, Shuzhen Li, Xu Wu, Qixuan Xiao, Bin ACS Omega [Image: see text] A comprehensive chemostratigraphic study, including evaluation of rare earth elements and trace elements, was conducted to explain the paleoenvironments of the northern margin of the Upper Yangtze Platform. Trace elements, like Ba, U, V, Cu, and Zn, tended to be more abundant in these formations than in the upper continental crust. The authigenic abundances of Al-normalized U and V, as well as the Th/U and V/Sc ratios, were used as indicators of the redox circumstances. In the Nanjiang area, the redox circumstances of the bottom water during the Ordovician–Silurian transition changed from oxic in the Late Katian to slightly anoxic in the Hirnantian and then gradually became anoxic in the Early Rhuddanian. In the Chengkou area, the redox circumstances of the bottom water during the Ordovician–Silurian transition abruptly changed from oxic in the Late Katian to strongly anoxic in the Hirnantian and continued to become more anoxic until the Rhuddanian. The total organic carbon concentrations were well correlated with the redox circumstances of the bottom water. We conclude that the transient hydrothermal activity was not widely distributed during the Late Ordovician–Early Silurian transition, and it might also have been only a local event in the Upper Yangtze Platform. The enrichment in organic matter was mostly sourced from the photic zone and was governed by the redox circumstances of the bottom water. American Chemical Society 2023-03-28 /pmc/articles/PMC10099134/ /pubmed/37065066 http://dx.doi.org/10.1021/acsomega.3c00277 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Fu, Xiang Liu, Xuan Xiong, Shuzhen Li, Xu Wu, Qixuan Xiao, Bin Geochemical Changes in the Late Ordovician to Early Silurian Interval in the Northern Margin of the Upper Yangtze Platform, Southern China: Implications for Hydrothermal Influences and Paleocean Redox Circumstances |
title | Geochemical Changes
in the Late Ordovician to Early
Silurian Interval in the Northern Margin of the Upper Yangtze Platform,
Southern China: Implications for Hydrothermal Influences and Paleocean
Redox Circumstances |
title_full | Geochemical Changes
in the Late Ordovician to Early
Silurian Interval in the Northern Margin of the Upper Yangtze Platform,
Southern China: Implications for Hydrothermal Influences and Paleocean
Redox Circumstances |
title_fullStr | Geochemical Changes
in the Late Ordovician to Early
Silurian Interval in the Northern Margin of the Upper Yangtze Platform,
Southern China: Implications for Hydrothermal Influences and Paleocean
Redox Circumstances |
title_full_unstemmed | Geochemical Changes
in the Late Ordovician to Early
Silurian Interval in the Northern Margin of the Upper Yangtze Platform,
Southern China: Implications for Hydrothermal Influences and Paleocean
Redox Circumstances |
title_short | Geochemical Changes
in the Late Ordovician to Early
Silurian Interval in the Northern Margin of the Upper Yangtze Platform,
Southern China: Implications for Hydrothermal Influences and Paleocean
Redox Circumstances |
title_sort | geochemical changes
in the late ordovician to early
silurian interval in the northern margin of the upper yangtze platform,
southern china: implications for hydrothermal influences and paleocean
redox circumstances |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10099134/ https://www.ncbi.nlm.nih.gov/pubmed/37065066 http://dx.doi.org/10.1021/acsomega.3c00277 |
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