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Katagas, Christos G. (1984) High pressure metamorphism in Ghiaros Island, Cyclades, Greece. Geological Society, London, Special Publications, 17 (1). 537-544 doi:10.1144/gsl.sp.1984.017.01.40

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Reference TypeJournal (article/letter/editorial)
TitleHigh pressure metamorphism in Ghiaros Island, Cyclades, Greece
JournalGeological Society, London, Special Publications
AuthorsKatagas, Christos G.Author
Year1984 (January)Volume17
Page(s)537-544Issue1
PublisherGeological Society of London
URL
DOIdoi:10.1144/gsl.sp.1984.017.01.40Search in ResearchGate
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Mindat Ref. ID424382Long-form Identifiermindat:1:5:424382:7
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Full ReferenceKatagas, Christos G. (1984) High pressure metamorphism in Ghiaros Island, Cyclades, Greece. Geological Society, London, Special Publications, 17 (1). 537-544 doi:10.1144/gsl.sp.1984.017.01.40
Plain TextKatagas, Christos G. (1984) High pressure metamorphism in Ghiaros Island, Cyclades, Greece. Geological Society, London, Special Publications, 17 (1). 537-544 doi:10.1144/gsl.sp.1984.017.01.40
In(1984) Special Publication Vol. 17. Geological Society of London
Abstract/NotesSummary
The various rock types encountered in Ghiaros island have suffered an episode of progressive regional metamorphism which produced high pressure low temperature assemblages with Na-pyroxene and glaucophane. Later in their metamorphic history the rocks were affected by retrograde metamorphism. Glaucophane crystals became continuously zoned and sodic pyroxene crystals developed a patchy composition. Zoning in amphiboles extends from glaucophanitic cores through intermediate Na-Ca winchite compositions to actinolite rims. The compositional differences observed between the various patches in individual pyroxene crystals are interpreted to reflect contrasting P-T conditions which drive the continuous reaction jadeitic pyroxene + quartz ⇋ albite + acmitic pyroxene + quartz, to progressively less jadeite-rich pyroxene.

Locality Pages

LocalityCitation Details
Gyaros, Syros-Ermoupoli, South Aegean, Greece

Mineral Occurrences

LocalityMineral(s)
Gyaros, Syros-Ermoupoli, South Aegean, Greeceβ“˜ Actinolite, β“˜ Albite, β“˜ Glaucophane, β“˜ Jadeite, β“˜ Pyroxene Group, β“˜ Quartz, β“˜ Winchite


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