Post on 30-Jan-2020
transcript
PETROGRAFIA REGIONALEa.a. 2014-2015
1
Sergio Rocchirocchi@dst.unipi.it
URL corso: http://www.dst.unipi.it/dst/rocchi/SR/PR.htmlURL registro: http://unimap.unipi.it/registri/dettregistriNEW.php?re=61052::::&ri=4258
Università di PisaDipartimento di Scienze della Terra
Corso di Laurea Magistrale in Scienze e Tecnologie Geologiche
PETROGENETIC–GEODYNAMIC MODELS
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Wortel & Spakman (2000)
GEODYNAMIC MODELS
• slab dip
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Molli (2008) Faccenna et al. (2004)
GEODYNAMIC MODELS
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• slab-trench migration
Faccenna et al. (2004)
GEODYNAMIC MODELS
• slab migration-rotation
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Maffione et al. (2008)
Circular arrows with simple, double, and triple tips indicate post-Oligocene, post-Burdigalian, and post-Pliocene rotations, respectively. Vertical arrows indicate nonrotated areas after late Miocene-Pliocene times.
GEODYNAMIC MODELS
• slab migration• slab sinking• slab windows
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Cifelli et al. (2007)
Faccenna et al. (2004)
GEODYNAMIC MODELS
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Wortel & Spakman (2000)
GEODYNAMIC MODELS
• slab detachment• slab tear• lateral migration of slab detachment
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Wortel & Spakman (2000)
GEODYNAMIC MODELS
• slab tear-breakoff
9Rosenbaum et al. (2008)
GEODYNAMIC MODELS
• 3-D morphology• vertical slab windows
10Rosenbaum et al. (2008)
GEODYNAMIC MODELS
• propagation of slab-tear faults
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Rosenbaum et al. (2008)
PETROGENETIC-GEODYNAMIC MODELS
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• LILE/HFSE: metasomatism
• HFSE: premetasomatic mantle
Rosenbaum et al. (2008)
TMP & UK
S Tyrrhenian & central-southern Italy
PETROGENETIC-GEODYNAMIC MODELS
• LILE/HFSE: metasomatism• HFSE: premetasomatic mantle
13Rosenbaum et al. (2008)
PETROGENETIC-GEODYNAMIC MODELS
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Rosenbaum et al. (2008)
Gasparon et al. (2009)
D’Orazio et al. (2007)
CAPRAIA
VULTURE
METASOMATIC EPISODES
15Peccerillo (2005)
Peccerillo (2005)
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Tuscan Magmatic Provincelamproites Roman Magmatic Province Campania-Stromboli
restitic mantle fertile mantle
upper continental crustbulk addition
no element fractionation
upper continental crustelement fractionation
slab
aboveAlpine subduction zone late stage of Adria subduction above
Ionian subduction zone
+ + +
Tuscan Magmatic Province Roman Magmatic Province Central Campania (Stromboli)
low-P partial melting ofstrongly to moderately depleted phogopite harzburgite
(MBL)
high-P partial melting of MORB-OIB phlogopite lherzolite (asthenosphere)
partial melting of UC in the mantle (granitoids, terrigenous seds, felsic
granulites)
carbonatite melt (subducted marine carbonates)
subducted terrigenous sedspelagic seds
aboveAlpine subduction zone
aboveAdria subduction zone
aboveIonian subduction zone
+ ++OIB
Pecc
erill
o et
al.
Inno
cent
i, Se
rri e
t al
.