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Publications (22)
The proposed genetic model for orogenic gold deposits hosted in Archean cratons worldwide has long assumed a single, late-orogenic mineralisation event. Recent geochronological developments and their application to gold deposits, however, have challenged this conventional view and indicate that gold endowment in several world- class Archean systems...
High-grade (> 10 g/t) gold mineralization in orogenic gold deposits is of significant economic importance. Understanding the formation of such enriched ore zones is critical for gold exploration success. The world-class Jundee-Bogada gold camp in the Yilgarn Craton of Western Australia comprises both high-grade (avg. > 10 g/t, Jundee deposit) and l...
Assimilation and prolonged suspension of crust-derived sulfide liquid in komatiites are essential to form Ni-rich mineralisation. Evaluating the spatial relationship between komatiite-hosted Ni mineralisation and crustal S sources may thus provide insights into mechanisms of transport, metal enrichment and deposition of assimilated sulfide liquid....
The basement of Mesoarchean to Neoarchean greenstone basins in the Yilgarn craton is composed of fragments of evolved crust up to 3.7 Ga old. New cratonwide geochemical and isotopic data with unparalleled spatial resolution image a NE- to ENE-trending architecture in pre−2.73 Ga crust. These trends cannot be reconciled with plate-tectonic models, a...
Komatiites require external sulfur from country rocks to generate immiscible sulfide liquid, which concentrates metals to form economic nickel sulfide deposits. Although signatures related to mass-independent fractionation of S isotopes (MIF-S, denoted as Δ33S) may identify external S sources, their values may not be directly indicative of the S re...
Previous S isotope works suggested that the Mount Keith and Cliffs komatiite hosted Ni deposits in the Yilgarn Craton of Western Australia formed in different
volcanic environments. The Mount Keith deposit was interpreted to have formed near the komatiite vent and a VMS style S source in the felsic volcanic substrate,
whereas the Cliffs deposit for...
Les ressources métalliques jouent un rôle majeur dans la transition énergétique, à la fois pour le développement de nouvelles technologies et dans la production et le stockage d’énergies vertes.Ressources métalliques 2 propose une sélection d’études de provinces métallogéniques ou de gisements remarquables en Amérique, en Afrique ou présents au niv...
Our ability to understand the geological evolution of Archean cratons is fundamentally dependent on stratigraphic reconstructions across greenstone belts. Here, we integrate published stratigraphic, geochemical and geochronological data to produce a revised stratigraphic model for the Agnew-Wiluna Greenstone Belt of the Yilgarn Craton. The Agnew-Wi...
The Bonikro gold deposit and satellite Hiré open pits are located at the southern tip of the Oumé-Féttékro granite–greenstone belt in Côte d’Ivoire. Country rocks in the region have undergone polyphase deformation and prolonged arc magmatism during the Paleoproterozoic Eburnean orogeny. Intrusive host rocks at Hiré and Bonikro have been dated at 21...
The ~ 1.5 Moz Yaouré gold deposit, which is located within the Birimian greenstone belts of central Côte d’Ivoire (West Africa), is associated with two stages of economic gold mineralization. Both ore-forming stages occurred during protracted E-W-directed shortening associated with the Eburnean orogeny. The first mineralization stage is hosted by f...
The southern part of the West African Craton includes the Baoulé-Mossi Domain, the world’s premier Paleoproterozoic gold province (~10,000 metric ton gold endowment). Structural, metamorphic, and geochronological data suggest gold mineralisation occurred during three episodes that span much of the Eoeburnean and Eburnean orogenic cycles. Eoeburnean...
The ~15-Moz Ahafo South gold camp is located in southwest Ghana, the world’s premier Paleoproterozoic gold subprovince. Major orogenic gold deposits in the camp include Subika, Apensu, Awonsu, and Amoma. These deposits occur along an ~15-km strike length of the Kenyase-Yamfo shear zone, a major tectonostratigraphic boundary juxtaposing metamorphose...
Late- to post-collisional volcanism in the southern portion of the West African Craton (sWAC) has been described along the paleo-craton margin between the Paleoproterozoic Baoulé-Mossi domain and Archean Kénéma-Man nucleus. New lithostratigraphic and isotopic data for central Côte d’Ivoire, as well as revised regional stratigraphic correlations acr...
Paleoproterozoic terranes of the Man-Leo Shield in the southern part of the West African craton host one of the world’s largest gold provinces with an overall endowment >10,000 metric tons (t). Although gold deposition commenced by ca. 2170 Ma, most deposits formed later, either during the inversion and metamorphism of intraorogenic sedimentary bas...
The > 9 Moz total aggregate gold endowment at the Edikan mine, Kumasi Basin, Ghana, is contained within a cluster of orogenic gold deposits located along the Akropong fault zone. The granitoid-hosted orebodies at Edikan (e.g., AG2, AG3, Fobinso, Esuajah), essentially an interconnected mesh of gold-bearing quartz veins, formed during deformation eve...
The Kédougou-Kénieba inlier is the westernmost exposure of Birimian crust in the West African Craton. The inlier is host to several multi-million ounce gold deposits (e.g., Sadiola, Yatela, Loulo, Massawa, and Gounkoto) and a large iron ore resource (i.e. Falémé). Although the inlier has received increasing academic attention over the last decade,...
The Alamoutala gold deposit is located in the Kédougou-Kénieba inlier, a window of Paleoproterozoic rocks that crop out in eastern Senegal and western Mali. The deposit is part of the ∼3-Moz Au Yatela district and produced 308,400 oz Au between 2002 and 2012. Country rocks in the Alamoutala open pit consist of carbonate rocks, arenites, wackes, and...
The ∼8-Moz Sadiola Hill gold deposit is located in the Kédougou-Kénieba inlier, a window of deformed ca. 2200 to 2050 Ma rocks that crop out in eastern Senegal and western Mali. The geology of the inlier differs from other Paleoproterozoic granite-greenstone belts and sedimentary basins by the abundance of carbonate rocks. The Sadiola Hill gold dep...
