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Microanalyses link sulfur from large igneous provinces and Mesozoic mass extinctions

DOI: 10.1130/G35983.1 DOI Help

Authors: Sara Callegaro (University of Padova) , Don Baker (McGill University) , Angelo De Min (University of Trieste) , Andrea Marzoli (University of Padova) , Tina Geraki (Diamond Light Source) , Hervé Bertrand (Laboratoire de Géologie de Lyon) , Cecilia Viti (University of Siena) , Fabrizio Nestola (University of Padova)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Geology

State: Published (Approved)
Published: August 2014
Diamond Proposal Number(s): 6579 , 8058

Abstract: Volcanic gases can have devastating impacts on Earth's environment and life. However, measurement of volatile elements in prehistoric magmas is challenging. We present a new method for determining sulfur contents in magmas using its concentrations in clinopyroxenes and an experimentally determined crystal-melt partition coefficient. Using this method we compared magmatic sulfur contents in the Paraná-Etendeka large igneous province (LIP; South America) and two other similarly sized LIPs, the Central Atlantic magmatic province (CAMP) and the Deccan Traps (India). We found that the CAMP and Deccan Traps, both associated with major extinction events, contained high magmatic sulfur concentrations, up to 1900 ppm. Conversely, the Paraná-Etendeka LIP, lacking significant environmental effects, had substantially lower magmatic sulfur concentrations, less than 800 ppm.

Subject Areas: Earth Science, Environment, Technique Development

Instruments: I18-Microfocus Spectroscopy

Added On: 12/09/2014 09:05

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