Mantle wedge processes

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Presentation transcript:

Mantle wedge processes Limits of SZ ‘cold nose’ Van Keken, 2003

Compositional stratification Basaltic crust Harzburgitic mantle Peridotitic mantle 45 km 7 km Van Keken, EPSL, 2003

Compositional stabilization of oceanic lithosphere Vlaar et al., EPSL, 1994

Pre-plate tectonic cooling mechanism (?) Sufficient to cool to near-present day Tpot within 1 Byr Vlaar et al., EPSL, 1994

Zegers and Van Keken, Geology, 2001

Zegers and Van Keken, Geology, 2001

Zegers and Van Keken, Geology, 2001

Zegers and Van Keken, Geology, 2001