Van Keken, 2003
11
Van Keken, 2003 ‘cold nose’ Limits of SZ Mantle wedge processes
description
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
Transcript of Van Keken, 2003
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