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Interactions of asthenosphere and lithosphere following

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Present work: Nature and origin of pulse of intense magmatism of 30 my ... What are sensible time- and space-scales of asthenosphere uprise and. thermal event? ... – PowerPoint PPT presentation

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Title: Interactions of asthenosphere and lithosphere following


1
Interactions of asthenosphere and lithosphere
following continental collision BPK.
Present work Nature and origin of pulse of
intense magmatism of 30 my duration, following
continental collision copious mafic magma
derived from lithosphere, with numerous silicic
plutons as crustal melts. NERC student (Joanne
Neilson) and NIGL application pending
26/11. Hypothesis Slab breakoff admits
asthenosphere to base of lithosphere the former
is relatively dry but the lithosphere is wet and
partially melts. Lithosphere weakened and
plate-scale strain accommodated locally
along burn. Really havent a clue But we
have/will have the best reality handles in the
world to test any models What are sensible time-
and space-scales of asthenosphere uprise and
thermal event? Can slab breakoff lead to such
an intense/long pulse? What are the rheological
responses and changes due to local heating in
ductile crust? How does the crustal-melting
domain evolve with heating? How does the
brittle-ductile transition surface evolve? With
considerable topography?? And how might this
affect faulting? What are the main controls of
the evident rapid exhumation of the plutons?
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