Oxygen isotope constraints on the sulfur cycle over the past 10 million years

Turchyn, A. V. and Schrag, D. P. (2004) Oxygen isotope constraints on the sulfur cycle over the past 10 million years. SCIENCE, 303 (5666). pp. 2004-2007. DOI 10.1126/science.1092296

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Abstract

Oxygen isotopes in marine sulfate (delta(18)O(SO4)) measured in marine barite show variability over the past 10 million years, including a 5 per mil decrease during the Plio-Pleistocene, with near-constant values during the Miocene that are slightly enriched over the modern ocean. A numerical model suggests that sea level fluctuations during Plio-Pleistocene glacial cycles affected the sulfur cycle by reducing the area of continental shelves and increasing the oxidative weathering of pyrite. The data also require that sulfate concentrations were 10 to 20% lower in the late Miocene than today.

Item Type: Article
Uncontrolled Keywords: NIL AREP, 2004
Subjects: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Journal or Publication Title: SCIENCE
Volume: 303
Page Range: pp. 2004-2007
Identification Number: 10.1126/science.1092296
Depositing User: Sarah Humbert
Date Deposited: 24 Mar 2009 14:26
Last Modified: 23 Jul 2013 09:54
URI: http://eprints.esc.cam.ac.uk/id/eprint/881

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