Dear John,
In Gervais & Brown (2011) we are reviewing exhumation mechanisms in collisional orogens, many of which can produce isothermal decompression paths. From this review, we have concluded that the shape of P-T paths are not diagnostic, because they largely depend on the specific set of parameters included in each model. You will find references to several numerical models that produced isothermal paths in Table 1 of that paper. For an alternative view with reference to diapirism, you should consult Teyssier & Whitney (2002)and references therein.
I could send you, or any member of the list who could be interested, a PDF copy of Gervais & Brown (2011) upon offline request.
Cheers
Félix
References:
Gervais, F., Brown, R.L., 2011. Testing modes of exhumation in collisional orogens: Synconvergent channel flow in the southeastern Canadian Cordillera. Lithosphere, 3(1), 55-75.
Teyssier, C., Whitney, D.L., 2002. Gneiss domes and orogeny. Geology, 30(12), 1139-1142
____________________________________________
Félix Gervais, M.Sc., Ph.D.
Professeur adjoint/Assistant professor
Département des génies civil, géologique et des mines
École Polytechnique de Montréal
Montréal, Québec, Canada
Bureau B-623
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(514)340-4711 ext. 4739
----- Mail original -----
De: "john ponting" <[log in to unmask]>
À: [log in to unmask]
Envoyé: Jeudi 3 Avril 2014 10:33:06
Objet: [geo-metamorphism] Decompression
Dear members,
Can anybody suggest the tectonic causes of
the decompression (or Isothermal decompression) path followed by the
metamorphic rocks.
Thanks for the suggestions in the advanced
with warm regards,
J Ponting
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