TITLE:
Magma Mixing Genesis of the Mafic Enclaves and Related Granitoids in the Kan Granite-Gneiss Complex of Central Côte d’Ivoire: Evidence from Geology, Petrology and Geochemistry
AUTHORS:
Koffi Raoul Teha, Koffi Kossonou Jean-Marie Pria, Koffi Joseph Brou, Alain Nicaise Kouamelan, Marc Ephrem Allialy, Souad M’Rabet
KEYWORDS:
Magma Mixing, Mafic Microgranular Enclaves, Host Granitoids, Kan Granite-Gneiss Complex, West Africa
JOURNAL NAME:
Open Journal of Geology,
Vol.14 No.8,
August
26,
2024
ABSTRACT: The mafic enclaves from Paleoproterozoic domain are considered to be the results of large-scale crust-mantle interaction and magma mixing. In this paper, petrography, mineralogy and geochemistry were jointly used to determine the origin of the mafic enclaves and their relationship with the host granitoids of the Kan granite-gneiss complex. This study also provides new information on crust-mantle interactions. The mafic enclaves of the Kan vary in shape and size and have intermediate chemical compositions. The diagrams used show a number of similarities in the major elements (and often in the trace elements) between the mafic enclaves and the host granitoids. Geochemical show that the Kan rock are metaluminous, enriched in silica, medium to high-K calc-alkaline I-type granite. The similarities reflect a mixing of basic and acid magma. Mafic enclaves have a typical magmatic structure, which is characterized by magma mixing. The genesis of these rocks is associated with the context of subduction. They result from the mixing of a mafic magma originating from the mantle and linked to subduction, and a granitic magma (type I granite) that arises from the partial melting of the crust.