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GEOREF RECORD

Petrogenetic evolution of an ophiolite fragment in an ensialic marginal basin, northern Aegean (Samothraki Island, Greece)

Basilios Tsikouras and Konstantin Hatzipanagiotou
Petrogenetic evolution of an ophiolite fragment in an ensialic marginal basin, northern Aegean (Samothraki Island, Greece)
European Journal of Mineralogy (June 1998) 10 (3): 551-567

Abstract

The ophiolitic rocks on Samothraki Island comprise gabbro, diorite (with associated plugs and veins), massive dolerite and basalt; doleritic dykes are rooted in the gabbro and acted as feeders for the basalt. The mineralogy and chemistry of the clinopyroxenes from the gabbro and basalt are taken to suggest that both crystallized under low P; minimum equilibrium T were approximately 950 degrees C for gabbro clinopyroxenes and 1050-1250 degrees C for those of the basalt. Diorite hornblende-plagioclase pairs yielded equilibrium T of 690-740 degrees C. The petrogenetic evolution of the ophiolite suite was controlled by plagioclase and clinopyroxene fractionation under increasing f (sub O) (sub 2) ; olivine was probably eliminated at an early stage. It is suggested that this ophiolite originated in an ensialic back-arc basin.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 10
Serial Issue: 3
Title: Petrogenetic evolution of an ophiolite fragment in an ensialic marginal basin, northern Aegean (Samothraki Island, Greece)
Affiliation: University of Patras, Department of Geology, Patras, Greece
Pages: 551-567
Published: 199806
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 75
Accession Number: 1998-046912
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 4 tables, geol. sketch map
N35°19'60" - N40°49'60", E23°00'00" - E28°30'00"
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 199818
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