Petrological evidence for secular cooling in mantle plumes

Claude Herzberg () and Esteban Gazel
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Claude Herzberg: Rutgers University, 610 Taylor Road, Piscataway, New Jersey 08854-8066, USA
Esteban Gazel: Rutgers University, 610 Taylor Road, Piscataway, New Jersey 08854-8066, USA

Nature, 2009, vol. 458, issue 7238, 619-622

Abstract: Life history of a mantle plume The mantle plumes that produced large igneous provinces such as oceanic plateaus and continental flood provinces are thought — from geological mapping and geochronology studies — to have been hotter and more extensively melted than those that gave rise to the basalts that form more modern oceanic islands. Claude Herzberg and Esteban Gazel have obtained quantitative evidence to support this theory. They examined the composition of Galapagos-related lavas from sites across the Caribbean, and conclude from the results that the mantle plume that formed the Galapagos Islands has cooled by 60–120°C since the Cretaceous period. Petrological data of this type, together with deep-mantle studies, can provide a better picture of the birth, life and death cycle of mantle plumes.

Date: 2009
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DOI: 10.1038/nature07857

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