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Blueschist-to-greenschist transition and the P-T path of prasinites from the Lavrion area, Greece

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Blueschist-to-greenschist transition and the P-T path of prasinites from the Lavrion area, Greece (EN)
Baltatzis, E (EN)
journalArticle (EN)
2014-03-01T01:45:04Z
1996 (EN)
The Lavrion area is part of the Attic-Cycladic massif. Blue amphibole analyses revealed that they are glaucophane or ferroglaucophane. Ca-amphiboles are characterized as actinolite or actinolitic hornblende. The Ps component of epidotes from the glaucophane-bearing rocks varies from 25.42-30.89%, whereas the Ps component of epidotes from the greenschist assemblages ranges from 23.81-26.88%. Chlorites show narrow compositional variations of ferromagnesian ratios (X(mg)=0.48-0.53). Albites are almost pure Ab(100). The K-feldspar present has a low Ab content. The evolution of the prasinites studied is characterized by the progressive transformation of eclogite facies (?) rocks through epidote blueschists into greenschists. A P-T path for the prasinites is presented indicating epidote blueschist facies at P-T conditions of around 7.0-7.5 kbar and 300-340 degrees C. Pressures of 4.0-3.5 kbar and temperatures around 340-360 degrees C are estimated for the subsequent overprint in the greenschist facies. The path EBS to GS conditions followed under nearly isothermal uplift. (EN)
Mineralogy (EN)
Lavrion (EN)
greenschist (EN)
METAMORPHISM (EN)
prasinite (EN)
P-T path (EN)
SYSTEM S-A-F-M-C-N-H2O (EN)
SIFNOS CYCLADES (EN)
blueschist (EN)
Greece (EN)
EXHUMATION (EN)
METABASIC ROCKS (EN)
PRESSURE (EN)
ISLAND (EN)
EPIDOTE QUARTZ GEOTHERMOBAROMETER (EN)
CA-AMPHIBOLE (EN)
MINERALOGICAL MAGAZINE (EN)
English
MINERALOGICAL SOCIETY (EN)
Εθνικό Μετσόβιο Πολυτεχνείο
Ψηφιακό Αποθετήριο της Κεντρικής Βιβλιοθήκης του ΕΜΠ | Dspace@NTUA
Κεντρική Βιβλιοθήκη Ε.Μ.Π.
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