Late Eburnean granitization and tectonics along the western and northwestern margin of the Archean Kénéma–Man domain (Guinea, West African Craton)

Iron formations: A global record of Neoarchaean to Palaeoproterozoic environmental history

“…Iron formations in the Quadrilátero Ferrífero region in Brazil, Middleback Ridge (Gawler Craton) in South Australia, Nimba and Simandou Ranges in Liberia and Guinea, Krivoy Rog area in Ukraine, and Kursk Magnetic Anomaly (KMA) region in Russia are broadly similar in age based on available geochronological and chemostratigraphical constraints, and also display similar patterns of macrobanding (Prilutzky et al, 1992;Kulik and Korzhnev, 1997;Egal et al, 2002;Bekker et al, 2003;Phillips et al, 2006;Spier et al, 2007;Szpunar et al, 2011). These IFs were also deposited on reactivated continental margins, and are separated by prominent unconformities from overlying Palaeoproterozoic sequences, which correspond to a long gap in sedimentation following the supercontinent assembly at ca.…”

Characterizing and Indexing Regolith Materials Using Geochemistry towards Hidden Mineral Anomaly Delineation: A Case Study of Savannah Region of NW Ghana

“…6 with metamorphosed lavas and pyroclastic rocks containing basalts, andesite, rhyolites, dolerites with gabbroic intrusive particularly characterizing mostly the eastern and the southern block of the area [10][11][12][13][14]. The western block consists mainly of metasedimentary suite of rocks.…”

São Luís Craton and Gurupi Belt (Brazil): possible links with the West African Craton and surrounding Pan-African belts

“…The Man shield, which is of more interest for the present work, is subdivided into a western domain, predominantly of Archaean age (Kénema -Man domain), and a central-eastern domain, composed of Palaeoproterozoic rocks (Baoulé -Mossi domain). These domains are separated by the strike-slip Sassandra Shear Zone and by an Archaean-Palaeoproterozoic transitional domain (Feybesse & Milési 1994;Caby et al 2000;Egal et al 2002).…”

“…The third subject of discussion concerns the geotectonic evolution of the Palaeoproterozoic domain, with one group of researchers accepting modern plate tectonics (e.g., Abouchami et al 1990;Ledru et al 1994;Egal et al 2002), and other researchers invoking vertical, plume-related, 'Archaean type' dynamics associated with strikeslip tectonics (e.g., Vidal et al 1996;Caby et al 2000). Irrespective of the models, the two schools describe basically the same sequence of events that can be grouped as follows, at least for the post-2200 Ma period: (1) early oceanic stage producing tholeiitic basic rocks; (2) juvenile, metaluminous, calc-alkaline, sodic plutonism and volcanism; (3) clastic and volcaniclastic sedimentation derived from the precedent stages; (4) another generation of calc-alkaline magmatism and extensive production of crust derived leucogranites; (5) metamorphism and deformation.…”

“…However, the internal geological framework of each of these units remained uncertain. Despite unavoidable and continuous debate, knowledge of the geology and tectonic evolution of the northwestern African terrains has experienced significant advances in the last 15 years (Abouchami et al 1990;Feybesse & Milési 1994;Trompette 1997;Egal et al 2002;Caby 2003, and many others). In Brazil, only recently the geological evolution of the São Luís Craton and Gurupi Belt became better understood, on the basis of regional mapping programmes (Pastana 1995;Costa 2000), more robust geochronological information and reinterpretation of tectonic settings (Klein & Moura 2001, 2003Moura et al 2003;Klein et al 2005a, b).…”