(87)Sr/(86)Sr evidence from the epeiric Martin Ridge Basin for enhanced carbonate weathering during the Hirnantian

A pronounced positive δ(13)C excursion in the Hirnantian Age has been documented globally, reflecting large perturbations of carbon cycling in the Late Ordovician oceans. Increased organic-carbon burial or enhanced carbonate weathering during glacioeustatic sea-level regression has been proposed to...

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Autores principales: Hu, Dongping, Zhang, Xiaolin, Zhou, Lian, Finney, Stanley C., Liu, Yongsheng, Shen, Danielle, Shen, Megan, Huang, Wei, Shen, Yanan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5595791/
https://www.ncbi.nlm.nih.gov/pubmed/28900275
http://dx.doi.org/10.1038/s41598-017-11619-w
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author Hu, Dongping
Zhang, Xiaolin
Zhou, Lian
Finney, Stanley C.
Liu, Yongsheng
Shen, Danielle
Shen, Megan
Huang, Wei
Shen, Yanan
author_facet Hu, Dongping
Zhang, Xiaolin
Zhou, Lian
Finney, Stanley C.
Liu, Yongsheng
Shen, Danielle
Shen, Megan
Huang, Wei
Shen, Yanan
author_sort Hu, Dongping
collection PubMed
description A pronounced positive δ(13)C excursion in the Hirnantian Age has been documented globally, reflecting large perturbations of carbon cycling in the Late Ordovician oceans. Increased organic-carbon burial or enhanced carbonate weathering during glacioeustatic sea-level regression has been proposed to account for this anomalous C-isotope excursion. To test the two competing hypotheses, we measured (87)Sr/(86)Sr and δ(13)C of carbonates from the Copenhagen Canyon section in Nevada, USA. Our data reveal two rapid negative (87)Sr/(86)Sr shifts that coincide with two prominent positive δ(13)C excursions and glacial advances. Numerical model simulations suggest that enhanced weathering of carbonates driven by glacio-eustatically controlled sea-level fall is required to produce the observed drops of (87)Sr/(86)Sr and the coeval large positive δ(13)C excursions, possibly with or without increased organic carbon burial.
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spelling pubmed-55957912017-09-14 (87)Sr/(86)Sr evidence from the epeiric Martin Ridge Basin for enhanced carbonate weathering during the Hirnantian Hu, Dongping Zhang, Xiaolin Zhou, Lian Finney, Stanley C. Liu, Yongsheng Shen, Danielle Shen, Megan Huang, Wei Shen, Yanan Sci Rep Article A pronounced positive δ(13)C excursion in the Hirnantian Age has been documented globally, reflecting large perturbations of carbon cycling in the Late Ordovician oceans. Increased organic-carbon burial or enhanced carbonate weathering during glacioeustatic sea-level regression has been proposed to account for this anomalous C-isotope excursion. To test the two competing hypotheses, we measured (87)Sr/(86)Sr and δ(13)C of carbonates from the Copenhagen Canyon section in Nevada, USA. Our data reveal two rapid negative (87)Sr/(86)Sr shifts that coincide with two prominent positive δ(13)C excursions and glacial advances. Numerical model simulations suggest that enhanced weathering of carbonates driven by glacio-eustatically controlled sea-level fall is required to produce the observed drops of (87)Sr/(86)Sr and the coeval large positive δ(13)C excursions, possibly with or without increased organic carbon burial. Nature Publishing Group UK 2017-09-12 /pmc/articles/PMC5595791/ /pubmed/28900275 http://dx.doi.org/10.1038/s41598-017-11619-w Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Hu, Dongping
Zhang, Xiaolin
Zhou, Lian
Finney, Stanley C.
Liu, Yongsheng
Shen, Danielle
Shen, Megan
Huang, Wei
Shen, Yanan
(87)Sr/(86)Sr evidence from the epeiric Martin Ridge Basin for enhanced carbonate weathering during the Hirnantian
title (87)Sr/(86)Sr evidence from the epeiric Martin Ridge Basin for enhanced carbonate weathering during the Hirnantian
title_full (87)Sr/(86)Sr evidence from the epeiric Martin Ridge Basin for enhanced carbonate weathering during the Hirnantian
title_fullStr (87)Sr/(86)Sr evidence from the epeiric Martin Ridge Basin for enhanced carbonate weathering during the Hirnantian
title_full_unstemmed (87)Sr/(86)Sr evidence from the epeiric Martin Ridge Basin for enhanced carbonate weathering during the Hirnantian
title_short (87)Sr/(86)Sr evidence from the epeiric Martin Ridge Basin for enhanced carbonate weathering during the Hirnantian
title_sort (87)sr/(86)sr evidence from the epeiric martin ridge basin for enhanced carbonate weathering during the hirnantian
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5595791/
https://www.ncbi.nlm.nih.gov/pubmed/28900275
http://dx.doi.org/10.1038/s41598-017-11619-w
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