Polymetamorphic Evolution of Pre-Alpidic Basement Rocks on the Island of Sikinos (Cyclades, Greece)

Franz, L. and Okrusch, M. and Brocker, M.. (1993) Polymetamorphic Evolution of Pre-Alpidic Basement Rocks on the Island of Sikinos (Cyclades, Greece). Neues Jahrbuch für Mineralogie-Abhandlungen (4). pp. 145-162.

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On the island of Sikinos, Attic-Cycladic crystalline complex, remnants of a pre-Alpidic basement complex, initially consisting of a sedimentary sequence intruded by granodiorites and diorites are preserved. The basement complex under-went polyphase deformation and metamorphism. Based on textural and mineralogical evidence in the metasediments of the basement complex, three metamorphic events can be distinguished: A pre-Alpidic amphibolite facies metamorphism at peak temperatures of about 570 - 650-degrees-C and poorly constrained pressures of around 5 kbar, an Alpidic high-pressure event under conditions of the epidote-blueschist facies at minimum pressures of 10 kbar in an assumed temperature range of 450 - 500-degrees-C, and a subsequent Barrovian facies overprint under greenschist-facies conditions, at temperatures of 440 - 480-degrees-C and minimum pressures of 5 kbar. Owing to incomplete re-equilibration, these P - T estimates must be regarded with caution, although, they agree well with other estimates in the Attic-Cycladic crystalline complex.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Ehemalige Einheiten Umweltwissenschaften > Theoretische Petrologie (De Capitani)
UniBasel Contributors:Franz, Leander
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:12 Apr 2021 13:41
Deposited On:12 Apr 2021 13:41

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