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

2

Wortel & Spakman (2000)

GEODYNAMIC MODELS

• slab dip

3

Molli (2008) Faccenna et al. (2004)

GEODYNAMIC MODELS

4

• slab-trench migration

Faccenna et al. (2004)

GEODYNAMIC MODELS

• slab migration-rotation

5

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

6

Cifelli et al. (2007)

Faccenna et al. (2004)

GEODYNAMIC MODELS

7

Wortel & Spakman (2000)

GEODYNAMIC MODELS

• slab detachment• slab tear• lateral migration of slab detachment

8

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

11

Rosenbaum et al. (2008)

PETROGENETIC-GEODYNAMIC MODELS

12

• 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

14

Rosenbaum et al. (2008)

Gasparon et al. (2009)

D’Orazio et al. (2007)

CAPRAIA

VULTURE

METASOMATIC EPISODES

15Peccerillo (2005)

Peccerillo (2005)

16

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

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