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. © 2014 Geological Society of America.

Callegaro, S., Baker, D.R., de Min, A., Marzoli, A., Geraki, K., Bertrand, H., et al. (2014). Microanalyses link sulfur from large igneous provinces and Mesozoic mass extinctions. GEOLOGY, 42(10), 895-898 [10.1130/G35983.1].

Microanalyses link sulfur from large igneous provinces and Mesozoic mass extinctions

Callegaro, S.;Viti, C.;
2014-01-01

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. © 2014 Geological Society of America.
2014
Callegaro, S., Baker, D.R., de Min, A., Marzoli, A., Geraki, K., Bertrand, H., et al. (2014). Microanalyses link sulfur from large igneous provinces and Mesozoic mass extinctions. GEOLOGY, 42(10), 895-898 [10.1130/G35983.1].
File in questo prodotto:
File Dimensione Formato  
CallegaroetalGEOLOGY2014.pdf

non disponibili

Tipologia: Altro materiale allegato
Licenza: NON PUBBLICO - Accesso privato/ristretto
Dimensione 309.74 kB
Formato Adobe PDF
309.74 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/48496
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo