International scientific journal

ISSN: 2663-0419 (electronic version)

ISSN: 2218-8754 (print version)

International scientific journal

ISSN: 2663-0419 (electronic version)

ISSN: 2218-8754 (print version)

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Petrologic interpretation of the hybridization process in Mesozoic granitoid intrusions of Lesser Caucasus

A.D.Ismail-Zadeh

Institute of Geology and Geophysics of Azerbaijan National Academy of Sciences, AZ1143, Baku, H.Javid av., 119

Summary

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According to the petrologic-geochemical examinations of Plutonic complex of Mesozoic polyphase and polyfacies granitoid intrusions of gabbrodiorite-granodiorite-plagiogranit line, the primary plagiogranit – leukogranit structure of the initial magmatic melt (phase I) has been determined. Afterwards, in the condition of the abyssal contamination with the core substance and differentiation, following facies types have appeared – granitoid intrusions, granodiorites, quartz diorites, (phase II). The latter, during the reaction with ultrabasic plate in hypabyssal conditions, has formed hybrid rocks – gabbro, gabbro-norites, norites which are not an intrusive phase anymore. They serve as xeno-fragments, which were brought out during the implantation of granitoid intrusions. According to geological-geophysical and petrologic information, the existence possibility of allochtonous ultrabasic plate between consolidated pre-Alpine substructure and Mesozoic volcano-plutonic complex is being substantiated.