Petrology, geochemisty and isotopie characteristics of the shoshonitic plutonic rocks from Maronia area, West Thrace, Greece

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Published: Jan 1, 2001
DOI: https://doi.org/10.12681/bgsg.17129
Keywords:
Maronia plutonic rocks Greece High-K geochemistry Sr and Ο isotopes petrogenesis
L. PAPADOPOULOU
Department of Mineralogy, Petrology and Economic Geology, Aristotle University of Thessaloniki
G. CHRISTOFIDES
Department of Mineralogy, Petrology and Economic Geology, Aristotle University of Thessaloniki
M. BRÖCKER
Institut für Mineralogie
Α. KORONEOS
Department of Mineralogy, Petrology and Economic Geology, Aristotle University of Thessaloniki
T. SOLDATOS
Department of Mineralogy, Petrology and Economic Geology, Aristotle University of Thessaloniki
G. ELEFTHERIADIS
Department of Mineralogy, Petrology and Economic Geology, Aristotle University of Thessaloniki
Abstract

The Maronia pluton, a high-K intrusion in the Circum Rhodope Belt, comprises gabbro to monzonite to granite having pyroxene, biotite and less olivine and amphibole. Three rock groups have been recognised: a basic, an intermediate and an acid. Major, trace and REE geochemistry as well as Sr and Ο isotopes support a genetic relation between the basic and the intermediate group but not between them and the acid group. An AFC process with a carbonate assimilant or an MFC process, where the basic end-member is represented by the less evolved samples, and the acid end-member by more evolved samples having Sr isotopes higher than those in the acid group, is suggested for the evolution of the basic-intermediate group. The basic-intermediate group originates from a lithospheric mantle while the acid group probably from a low-Sr isotopes crustal melt.

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  • Petrology
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