International Geological Journal - Official Journal of the Carpathian-Balkan Geological Association

Petrology of plagiogranite from Sjenica, Dinaridic Ophiolite Belt (southwestern Serbia)

Pages: 97 - 106

Authors: DRAGAN MILOVANOVIC, DANICA SRECKOVIC-BATOCANIN, MARIJA SAVIC, DANA POPOVIC

Abstract: The Sjenica plagiogranite occurs in the southern part of the Dinaridic Ophiolite Belt, 5 km northwest of Sjenica. The main minerals are albite with strongly altered biotite (replaced with chlorite), with occasional amphibole (magnesio hornblende to tschermakite) and quartz. An enclave of fine-grained granitic rocks with garnet grains was noted too. Secondary minerals are calcite and chlorite (daphnite). Major, trace and REE geochemistry coupled with field observations support a model by which the Sjenica plagiogranite could be formed by fractional crystallization of mantle origin mafic magma in a supra-subduction zone setting. Occurrences of calcite and chlorite nests in the Sjenica plagiogranites revealed that these rocks underwent hydrothermal alteration due to intensive sea water circulation in a sub-sea-floor environment.

Keywords: Serbia, Dinaridic Ophiolite Belt, geochemistry, petrology, ophiolite, plagiogranite

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