Phase equilibria and mineral parageneses of metabasites in low- grade metamorphism.

J. G. Liou, S. Maruyama, M. Cho

Research output: Contribution to journalArticle

214 Citations (Scopus)

Abstract

The system CaO-Al2O3-Na2O-MgO-SiO2-H2O is suitable for modelling phase equilibria and mineral parageneses for low-T metamorphism of basaltic rocks; univariant reactions marking the transitions between various sub-greenschist facies are identified and some have been determined experimentally. The introduction of Fe2O3 into a model of fixed FeO/MgO ratio creates continuous reactions for facies boundaries and discontinuous reactions for invariant points. The XFe3+ isopleths for epidote are plotted to illustrate the transition from the zeolite facies, through prehnite-pumpellyite to the prehnite-actinolite facies, and T-XFe3+ relations are established for both continuous and discontinuous reactions relating such facies transitions. An isobaric Al-Ca-Fe3+ plot from the chlorite projection can be applied to low-T metamorphic rocks where two or three Ca-Al silicates occur.-R.A.H.

Original languageEnglish
Pages (from-to)321-333
Number of pages13
JournalMineralogical Magazine
Volume49
Issue number3
Publication statusPublished - 1985
Externally publishedYes

Fingerprint

low grade metamorphism
metabasite
phase equilibrium
paragenesis
Phase equilibria
Minerals
Metamorphic rocks
Zeolites
Silicates
prehnite
mineral
Rocks
pumpellyite
epidote
greenschist facies
zeolite
metamorphic rock
chlorite
metamorphism
silicate

ASJC Scopus subject areas

  • Geochemistry and Petrology

Cite this

Phase equilibria and mineral parageneses of metabasites in low- grade metamorphism. / Liou, J. G.; Maruyama, S.; Cho, M.

In: Mineralogical Magazine, Vol. 49, No. 3, 1985, p. 321-333.

Research output: Contribution to journalArticle

Liou, JG, Maruyama, S & Cho, M 1985, 'Phase equilibria and mineral parageneses of metabasites in low- grade metamorphism.', Mineralogical Magazine, vol. 49, no. 3, pp. 321-333.
Liou, J. G. ; Maruyama, S. ; Cho, M. / Phase equilibria and mineral parageneses of metabasites in low- grade metamorphism. In: Mineralogical Magazine. 1985 ; Vol. 49, No. 3. pp. 321-333.
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