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- Title
Possible physicochemical facies of wehrlitization of ultramafic rocks in the mantle wedge under volcanoes of the Kuril-Kamchatka frontal zone.
- Authors
Sharapov, V.; Kuznetsov, G.; Chudnenko, K.
- Abstract
A quantitative model describing the dynamics of the process of metasomatic wehrlitization of ultramafics is put forward. It is elaborated for the process taking place in permeable fault zones over a time span of 50 kyr with fluid source depths in the range of 150-50 km at initial temperatures of 1000-1200°C. The possibility of existence of two physical-chemical facies of this process has been demonstrated: one occurs at the level of garnet and the other is at the level of spinel depth facies. Their realization is related to the dependence of the activity of Mg-Ca-Si metasomatism against variation in the composition of low-molecular hydrocarbons in a fluid under conditions of changing T and P in a system.
- Subjects
KURIL Islands (Russia); ULTRABASIC rocks; IGNEOUS rocks; VOLCANOES; METASOMATISM; HYDROCARBONS
- Publication
Doklady Earth Sciences, 2016, Vol 467, Issue 2, p360
- ISSN
1028-334X
- Publication type
Article
- DOI
10.1134/S1028334X16040061