The Amount of Recycled Crust in Sources of Mantle-Derived Melts
Australian National University · Russian Academy of Sciences · +12 more institutions
Abstract
Plate tectonic processes introduce basaltic crust (as eclogite) into the peridotitic mantle. The proportions of these two sources in mantle melts are poorly understood. Silica-rich melts formed from eclogite react with peridotite, converting it to olivine-free pyroxenite. Partial melts of this hybrid pyroxenite are higher in nickel and silicon but poorer in manganese, calcium, and magnesium than melts of peridotite. Olivine phenocrysts' compositions record these differences and were used to quantify the contributions of pyroxenite-derived melts in mid-ocean ridge basalts (10 to 30%), ocean island and continental basalts (many >60%), and komatiites (20 to 30%). These results imply involvement of 2 to 20% (up…
Citation impact
- FWCI
- 48.69
- Percentile
- 100%
- References
- 38
Authors
20- АВА. В. СоболевCorresponding
Australian National University, Russian Academy of Sciences, V.S. Sobolev Institute of Geology and Mineralogy, Max Planck Institute for Chemistry, V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry, Université Grenoble Alpes
- AWAlbrecht W. Hofmann
Australian National University, Russian Academy of Sciences, V.S. Sobolev Institute of Geology and Mineralogy, Max Planck Institute for Chemistry, V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry, Université Grenoble Alpes
- DVD. V. Kuzmin
Australian National University, Russian Academy of Sciences, V.S. Sobolev Institute of Geology and Mineralogy, Max Planck Institute for Chemistry, V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry, Université Grenoble Alpes
- GMGregory M. Yaxley
Australian National University, Russian Academy of Sciences, V.S. Sobolev Institute of Geology and Mineralogy, Max Planck Institute for Chemistry, V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry, Université Grenoble Alpes
- NANicholas Arndt
Australian National University, Russian Academy of Sciences, V.S. Sobolev Institute of Geology and Mineralogy, Max Planck Institute for Chemistry, V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry, Université Grenoble Alpes
Topics & keywords
- Eclogite
- Peridotite
- Geology
- Geochemistry
- Mantle (geology)
- Basalt
- Oceanic crust
- Crust
- Life below water