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)

SCImago Journal & Country Rank

Geochemical characteristics of the Gadabay intrusion complex in the study of magma evolution and tectonic pattern of the region (Lesser Caucasus, Azerbaijan territory)

Abbasov K.F.

Ministry of Science and Education of the Republic of Azerbaijan, Institute of Geology and Geophysics, Azerbaijan 119, H.Javid Ave., Baku, AZ1143:




The Gadabay intrusion complex which is located within the Lok-Garabakh structural-formation zone of the Lesser Caucasus is formed in two magmatic phases – gabbroid and granitic. Quartz diorites as the second phase are the most widespread rocks of the intrusion complex. Alkaline rocks such as monzodiorites and monzonites with limited distribution in the region are considered as a branch of the second phase. However, the results of ilmenite-titanomagnetite geothermometry show equal and higher crystallization temperatures of these alkaline rocks. Despite the detailed petrographic and field studies, the source of magmatic melts that formed the intrusion is not deeply studied. And trace element composition of rocks of Gadabay intrusion complex is worth to be investigated. Furthermore, distribution of trace elements in certain minerals can also be considered as a valuable information source. Distribution of Fe group elements (Ni, Cr, V, Co), alkaline earth elements (Sr, Ba), and rare earth elements (in the rocks of Gadabay intrusion complex is controlled by fractional crystallization. Hence, concentration of coherent elements and heavy rare earth elements decrease towards more evolved rock types, whereas concentration of incoherent elements and light rare earth elements increase. Next fact is that Gadabay intrusion complex has been formed within calc-alkaline magma series and primitive melt was formed as a result of partial melting of an enriched mantle substrate which is proved by diagrams composed base on trace elements’ ratios.


Keywords: Gadabay intrusion, REE elements, iron group elements, trace elements, classification diagrams, lithospheric mantle, partial melting, composition of primitive melts




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DOI: 10.33677/ggianas20230100095