Perrouty S. auteur aut IRD Lindsay M. D. auteur aut IRD Jessell Mark auteur aut IRD Ailleres L. auteur aut IRD Martin R. auteur aut IRD Bourassa Y. auteur aut IRD text journalArticle eng text/pdf born digital access A three-dimensional model of the gold-rich Paleoproterozoic Ashanti Greenstone Belt has been built with a "hybrid" geological modeling method using Geomodeller and Gocad, then inverted using VPmg software. The model helps to identify the main regional-scale controls leading to abundant gold mineralization in the southeast of the belt by highlighting the lithological distribution and geometry of geological structures. The three-dimensional geological model shows that 85% of gold occurrences in the Ashanti Greenstone Belt are proximal to a specific tholeiitic metabasaltic horizon "BV1". This result is noteworthy given that the relatively thin, 300 m thick, BV1 layer represents only 10%, by volume, of the modeled Sefwi Group stratigraphy. A map of distance between the topography and the BV1 layer is produced and identifies areas showing a high probability to host gold deposits in the southeast of the Ashanti Belt. Possible structural controls performed by the BV1 tholeiitic metabasaltic rocks on the location of gold occurrences are discussed, and we hypothesize that the BV1 layer acted as a mineralization trap or source of gold. Both hypotheses agree with examples from the literature and explain the observed distribution of the mineralized sites. specialized Geological modeling Geomodeller Gocad VPmg Gravity inversions Ashanti Belt Ghana GHANA 064 020 63 252-264 2014 0169-1368 https://www.documentation.ird.fr/hor/fdi:010062527 10.1016/j.oregeorev.2014.05.011 0169-1368 [F B010062527] https://www.documentation.ird.fr/hor/fdi:010062527 https://www.documentation.ird.fr/intranet/publi/2014/09/010062527.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2014-10-02 2017-08-23 fdi:010062527 fre