Stretching the envelope of past surface environments : Neoproterozoic glacial lakes from Svalbard.

Bao, Huiming and Fairchild, Ian J. and Wynn, Peter M. and Spotl, Christoph (2009) Stretching the envelope of past surface environments : Neoproterozoic glacial lakes from Svalbard. Science, 323 (5910). pp. 119-122. ISSN 0036-8075

[img]
Preview
PDF (Stretching_the_envelope_of_past_surface_environments_e-prints.pdf)
Stretching_the_envelope_of_past_surface_environments_e-prints.pdf

Download (343kB)

Abstract

The oxygen isotope composition of terrestrial sulfate is affected measurably by many Earth- surface processes. During the Neoproterozoic, severe " snowball" glaciations would have had an extreme impact on the biosphere and the atmosphere. Here, we report that sulfate extracted from carbonate lenses within a Neoproterozoic glacial diamictite suite from Svalbard, with an age of similar to 635 million years ago, falls well outside the currently known natural range of triple oxygen isotope compositions and indicates that the atmosphere had either an exceptionally high atmospheric carbon dioxide concentration or an utterly unfamiliar oxygen cycle during deposition of the diamictites.

Item Type: Journal Article
Journal or Publication Title: Science
Uncontrolled Keywords: /dk/atira/pure/researchoutput/libraryofcongress/ge
Subjects:
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 28101
Deposited By: Dr. Peter Wynn
Deposited On: 10 Nov 2009 09:00
Refereed?: Yes
Published?: Published
Last Modified: 18 Sep 2019 00:30
URI: https://eprints.lancs.ac.uk/id/eprint/28101

Actions (login required)

View Item View Item