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Mantle wedge processes. Limits of SZ. ‘cold nose’. Van Keken, 2003. Basaltic crust. 7 km. Harzburgitic mantle. 45 km. Peridotitic mantle. Compositional stratification. Van Keken, EPSL, 2003. Tpot=200-250 K higher. Abbott et al., JGR, 1994. - PowerPoint PPT Presentation
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Van Keken, 2003
‘cold nose’
Limits of SZ
Mantle wedge processes
Van Keken, EPSL, 2003
Basaltic crust
Harzburgitic mantle
Peridotitic mantle
45 km
7 km
Compositional stratification
Abbott et al., JGR, 1994Tpot=200-250 K higher
Compositional stabilization of oceanic lithosphere
Vlaar et al., EPSL, 1994
Vlaar et al., EPSL, 1994
Pre-plate tectonic cooling mechanism (?)
Sufficient to cool to near-present dayTpot within 1 Byr
Courtesy of R. Blewett
Zegers and Van Keken, Geology, 2001
Zegers and Van Keken, Geology, 2001
Zegers and Van Keken, Geology, 2001
Zegers and Van Keken, Geology, 2001
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