Open AccessGeochemistry of Garga-Sarali intrusive granitoids (central domain of the central African fold belt in Cameroon): petrological implication
Author(s) -
Isaac Daama,
Mbowou Gbambié Isaac Bertrand,
Yamgouot Ngounouno Fadimatou,
Ntoumbé Mama,
Ismaı̈la Ngounouno
Publication year - 2020
Publication title -
international journal of advanced geosciences
Language(s) - English
Resource type - Journals
ISSN - 2311-7044
DOI - 10.14419/ijag.v8i1.30559
Subject(s) - geology , geochemistry , biotite , partial melting , zircon , microcline , pyroxene , muscovite , feldspar , fractional crystallization (geology) , quartz , plagioclase , volcanic rock , petrology , mantle (geology) , volcano , olivine , paleontology
The Garga-Sarali granitoids outcrop in form of large slabs and undistorted large blocks, into a schisto-gneissic basement. These rocks contain mainly muscovite and microcline, followed by K-feldspar, quartz, biotite, pyroxene, zircon and oxides, with coarse-grained to fine-grained textures. Geochemical analysis show that it belongs to differentiated rocks group (granodiorite-granite) with high SiO2 (up to 72 wt%) contents. Their genesis was made from a process of partial melting and fractional crystallization. These rocks are classified as belonging to I- and S-Type, meta-peraluminous, shoshonitic granites; belonging to the domain of volcanic arcs. The rare earth elements patterns suggest a source enriched of incompatible elements. The Nb-Ta and Ti negative anomalies from the multi-element patterns are characteristics of the subduction domains.