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 language | English |
|---|---|
| Pages (from-to) | 321-333 |
| Number of pages | 13 |
| Journal | Mineralogical Magazine |
| Volume | 49 |
| Issue number | 3 |
| Publication status | Published - 1985 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - Phase equilibria and mineral parageneses of metabasites in low- grade metamorphism.
AU - Liou, J. G.
AU - Maruyama, S.
AU - Cho, M.
PY - 1985
Y1 - 1985
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0022007962&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0022007962&partnerID=8YFLogxK
M3 - Article
VL - 49
SP - 321
EP - 333
JO - Mineralogical Magazine
JF - Mineralogical Magazine
SN - 0026-461X
IS - 3
ER -