Chemostratigraphic Evidence of Deccan Volcanism from the Marine Osmium Isotope Record-Reference-Cited by-同舟云学术

Chemostratigraphic Evidence of Deccan Volcanism from the Marine Osmium Isotope Record

Published:2003-11-21 Issue:5649 Volume:302 Page:1392-1395
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Ravizza G.¹²,Peucker-Ehrenbrink B.¹²

Affiliation:

1. Department of Geology and Geophysics, University of Hawaii, Honolulu, HI 96822–2225, USA.

2. Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution (WHOI), Woods Hole, MA 02543, USA.

Abstract

Continental flood basalt (CFB) volcanism is hypothesized to have played a causative role in global climate change and mass extinctions. Uncertainties associated with radiometric dating preclude a clear chronological assessment of the environmental consequences of CFB volcanism. Our results document a 25% decline in the marine 187 Os/ 188 Os record that predates the Cretaceous-Tertiary boundary (KTB) and coincides with late Maastrichtian warming. We argue that this decline provides a chemostratigraphic marker of Deccan volcanism and thus constitutes compelling evidence that the main environmental consequence of Deccan volcanism was a transient global warming event of 3° to 5°C that is fully resolved from the KTB mass extinction.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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