Merline L. Djouka-Fonkwe's research while affiliated with University of Wuerzburg and other places

Publications (4)

Article
The Collahuasi district is a porphyry Cu-Mo subprovince located on the Andean high plateau of northern Chile. Late Eocene-early Oligocene mineralization in the district involved hydrothermal alteration of the upper Paleozoic to Lower Triassic Collahuasi Group granodiorites, diorites, andesites, dacites, and rhyolites, which had previously experienc...
Article
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The Bafoussam area in western Cameroon is part of the Central African Orogenic Belt. It is dominated by granitoids which belong to the Pan-African syn- to post-collisional post-650 Ma group. Syenogranites are predominant, but alkali-feldspar granite, monzogranite, quartz-monzonite and quartz-monzodiorite occur as well. Four granitoid suites, biotit...

Citations

... In the area far from the center of hydrothermal systems, where the considerable lowtemperature and neutral meteoric water may be involved, original structures of altered rocks and mineral morphologies are generally well preserved, and chlorite mostly appears in the form of replacement and dissemination (e.g. Collahuasi District, Djouka-Fonkwé et al., 2012;El Teniente deposit, Wilkinson et al., 2020); at this time, chlorite compositions may be controlled by the host rock or the equilibrated meteoric water, both of which are different in properties from the ore-forming fluid. In contrast, in the area closer to the center of hydrothermal systems, where the area is dominated by high-temperature and lower pH ore-forming fluids, the destruction of the original structure of altered rocks and mineral morphologies is obvious, and veins and hydrothermal breccias are developed (e.g. ...
... According to Villasseca et al. (2008), the origin of peraluminous granitic rocks is faced with several challenges, including; the contamination process during magma transport and emplacement, nature of the rocks protolith, the incorporation of residual material and/or inherited components, temperature and pressure conditions involved during magma generation, crystallization and magma differentiation processes (crystal fractionation, magma mixing, volatile Exsolution). The Adamawa-Yadé-Domain (AYD) of the Cameroon Central African Fold Belt (CAFB) is characterized by a variety of granitic rocks mainly displaying metaluminous to weakly peraluminous character (Nguiessi-Tchamkam et al. 1997;Tagne-Kamga et al. 1999;Tagne-Kamga 2003;Njanko et al. 2006;Tchameni et al. 2006;Djouka-Fonkwé et al. 2008;Kwékam et al. 2010Kwékam et al. , 2013Ngoniri et al. 2020;Assomo et al. 2021). This area falls in the AYD separated from the Western Cameroon Domain (WCD) by the Tcholliré-Banyo Fault (TBF). ...