Hot acidic Late Permian seas stifle life in record time

Svetoslav Georgiev; Holly J. Stein; Judith L. Hannah; Bernard Bingen; Hermann M. Weiss; Stefan Piasecki

doi:10.1016/j.epsl.2011.08.010

Hot acidic Late Permian seas stifle life in record time

Svetoslav Georgiev, Holly J. Stein, Judith L. Hannah, Bernard Bingen, Hermann M. Weiss, Stefan Piasecki

Geologi

67 Citationer (Scopus)

Abstract

The end of Permian time (252-251Ma) hosts the largest mass extinction in Earth history, yet events heralding this global catastrophe remain intensely disputed. We present a chemostratigraphic marker, the ¹⁸⁷Re/¹⁸⁸Os ratio, which soars to unprecedented levels approaching the Permo-Triassic boundary. These ratios are tied to profound trace element changes and a precise Re-Os time record at 252Ma preserved in black shales from East Greenland and the mid-Norwegian shelf. Within a 36-meter shale section, an 80-fold increase in Re concentrations (two-fold for Os) signals seawater conditions that became increasingly inhospitable to life. Unwavering initial ¹⁸⁷Os/¹⁸⁸Os ratios of 0.6 preclude mafic volcanism and meteorite impact as the direct cause of Late Permian anoxia. We argue that extraordinarily high ¹⁸⁷Re/¹⁸⁸Os ratios are the hallmark of simultaneously rising ocean temperature and acidity, leading to loss of oxygen and the stifling of life in latest Permian time.

Originalsprog	Engelsk
Tidsskrift	Earth and Planetary Science Letters
Vol/bind	310
Udgave nummer	3-4
Sider (fra-til)	389–400
ISSN	0012-821X
DOI	https://doi.org/10.1016/j.epsl.2011.08.010
Status	Udgivet - 15 okt. 2011

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10.1016/j.epsl.2011.08.010

Citationsformater

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title = "Hot acidic Late Permian seas stifle life in record time",

abstract = "The end of Permian time (252-251Ma) hosts the largest mass extinction in Earth history, yet events heralding this global catastrophe remain intensely disputed. We present a chemostratigraphic marker, the 187Re/188Os ratio, which soars to unprecedented levels approaching the Permo-Triassic boundary. These ratios are tied to profound trace element changes and a precise Re-Os time record at 252Ma preserved in black shales from East Greenland and the mid-Norwegian shelf. Within a 36-meter shale section, an 80-fold increase in Re concentrations (two-fold for Os) signals seawater conditions that became increasingly inhospitable to life. Unwavering initial 187Os/188Os ratios of 0.6 preclude mafic volcanism and meteorite impact as the direct cause of Late Permian anoxia. We argue that extraordinarily high 187Re/188Os ratios are the hallmark of simultaneously rising ocean temperature and acidity, leading to loss of oxygen and the stifling of life in latest Permian time.",

author = "Svetoslav Georgiev and Stein, {Holly J.} and Hannah, {Judith L.} and Bernard Bingen and Weiss, {Hermann M.} and Stefan Piasecki",

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T1 - Hot acidic Late Permian seas stifle life in record time

AU - Georgiev, Svetoslav

AU - Stein, Holly J.

AU - Hannah, Judith L.

AU - Bingen, Bernard

AU - Weiss, Hermann M.

AU - Piasecki, Stefan

PY - 2011/10/15

Y1 - 2011/10/15

N2 - The end of Permian time (252-251Ma) hosts the largest mass extinction in Earth history, yet events heralding this global catastrophe remain intensely disputed. We present a chemostratigraphic marker, the 187Re/188Os ratio, which soars to unprecedented levels approaching the Permo-Triassic boundary. These ratios are tied to profound trace element changes and a precise Re-Os time record at 252Ma preserved in black shales from East Greenland and the mid-Norwegian shelf. Within a 36-meter shale section, an 80-fold increase in Re concentrations (two-fold for Os) signals seawater conditions that became increasingly inhospitable to life. Unwavering initial 187Os/188Os ratios of 0.6 preclude mafic volcanism and meteorite impact as the direct cause of Late Permian anoxia. We argue that extraordinarily high 187Re/188Os ratios are the hallmark of simultaneously rising ocean temperature and acidity, leading to loss of oxygen and the stifling of life in latest Permian time.

AB - The end of Permian time (252-251Ma) hosts the largest mass extinction in Earth history, yet events heralding this global catastrophe remain intensely disputed. We present a chemostratigraphic marker, the 187Re/188Os ratio, which soars to unprecedented levels approaching the Permo-Triassic boundary. These ratios are tied to profound trace element changes and a precise Re-Os time record at 252Ma preserved in black shales from East Greenland and the mid-Norwegian shelf. Within a 36-meter shale section, an 80-fold increase in Re concentrations (two-fold for Os) signals seawater conditions that became increasingly inhospitable to life. Unwavering initial 187Os/188Os ratios of 0.6 preclude mafic volcanism and meteorite impact as the direct cause of Late Permian anoxia. We argue that extraordinarily high 187Re/188Os ratios are the hallmark of simultaneously rising ocean temperature and acidity, leading to loss of oxygen and the stifling of life in latest Permian time.

U2 - 10.1016/j.epsl.2011.08.010

DO - 10.1016/j.epsl.2011.08.010

M3 - Journal article

SN - 0012-821X

VL - 310

SP - 389

EP - 400

JO - Earth and Planetary Science Letters

JF - Earth and Planetary Science Letters

IS - 3-4

ER -

Hot acidic Late Permian seas stifle life in record time

Abstract

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