Tomographie sismique.kmz

Accrétion océanique dans l'Atlantique Nord

Flux thermique

Flux thermique océanique
The oceanic heat flow shown here is computed from the age of the seafloor using the expression for an infinite half space for ages less than 100 Myr and is set equal to 48 mW m-2 for ages larger than that. More precisely, the heat flow density in mW m-2 is computed according to
with a the age of the seafloor in Myr, for a≤100Myr. This expression comes from the theory of half space cooling, which is found to fit very well good quality heat flow data for seafloor younger than 100 Myr. For larger ages the flow is found to be essentially constant, equal to 48 mW m-2 (Lister_etal, 1990).
The image is computed using the Generic Mapping Tool (GMT).
References
C. Jaupart, S. Labrosse, J.-C. Mareschal, 2007, "Temperatures, Heat and Energy in the Mantle of the Earth", Treatise on Geophysics, vol. 7: Mantle dynamics (Bercovici, Schubert, eds), pp. 253-303. (see also)
C.R.B. Lister, J.G. Sclater, E.E. Davis, H. Villinger and S. Nagahira, 1990. Heat flow maintained in ocean basins of great age: investigations in the north equatorial west Pacific. Geophys. J. Int., 102, 603-630.
Laboratoire des sciences de la Terre
Stéphane Labrosse

Oceanic heat flow

Sea Floor Heat Flow Color Bar

Transect dans l'océan Atlantique

transect

Epaisseur de la croûte

épaisseur de la croûte

Cartes des anomalies sismiques à différentes profondeurs.

Obayashi et al., 2009. Tearing of Stagnant Slab, Science 324, 1173-1175.

corrigé

correction du transect de l'océan Atlantique
Obayashi et al., 2009. Tearing of Stagnant Slab, Science 324, 1173-1175.

Subduction au niveau du Pacifique

Age des fonds océaniques

Scale in Millions years

quelques exemple de pendage

Guyot du capricorne
Obayashi et al., 2009. Tearing of Stagnant Slab, Science 324, 1173-1175.

Kermadec

Sous la mer des Philippines

Osaka

Fukushima

Mer d'Okhotsk

les roches des zones de subduction

Roches volcaniques des iles du Japon

Nord Uwajima

Sud Uwajima

Shozu

Niseke

Toyako

Oshima

legend

reference=Niseko
method=
rock type= ANDESITE

sampleID :a
reference:Niseko
method :
rock type: ANDESITE
value :SiO2=58.23
value :TiO2=1.01
value :Cr2O3=
value :Fe2O3=9.36
value :FeO=
value :MnO=0.14
value :MgO=3.32
value :CaO=7.65
value :Na2O=2.89
value :K2O=1.01
longitude:140.5579
latitude :42.7974

FeO=

residual

reference=Toyako
method=
rock type=DACITE

sampleID :b
reference:Toyako
method :
rock type:DACITE
value :SiO2=71.25
value :TiO2=0.43
value :Cr2O3=
value :Fe2O3=5.
value :FeO=
value :MnO=0.27
value :MgO=0.84
value :CaO=3.1
value :Na2O=4.02
value :K2O=1.15
longitude:140.9199
latitude :42.5475

reference=Oshima
method=
rock type= BASALTE

sampleID :c
reference:Oshima
method :
rock type: BASALTE
value :SiO2=48.89
value :TiO2=1.02
value :Al2O3=15.0
value :Cr2O3=
value :Fe2O3=8.53
value :FeO=
value :MnO=0.25
value :MgO=10.6
value :CaO=10.91
value :Na2O=1.95
value :K2O=1.13
longitude:139.3554
latitude :41.5111

reference=Nord Uwajima
rock type=GRANODIORITE

sampleID :d
reference:Nord Uwajima
rock type:GRANODIORITE
value :Fe2O3=3.62

reference=Sud Uwajima
rock type=GRANITE

sampleID :e
reference:Sud Uwajima
rock type:GRANITE

reference=Shozu
rock type=RHYOLITE

sampleID :f
reference:Shozu
rock type:RHYOLITE

les roches qui composent les montagnes

Carte Geologique au 50000e

Structure des Alpes

diagrammes corrigés

reference=
rock type=

sampleID :GP11
reference:
rock type:
value :Al2O3=12.6
value :Fe2O3 + FeO=1.44

sampleID :GN330
reference:
rock type:
value :Al2O3=13.1
value :Fe2O3 + FeO=1.09

sampleID :GO211a
reference:
rock type:
value :Fe2O3 + FeO=1.43

sampleID :GO211b

sampleID :GO38

sampleID :GO28

sampleID :GO39

sampleID :DD22

sampleID :398.0

sampleID :397.0

sampleID :391.0

Wa
reference=
rock type=

sampleID :Wa