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TitreA review of reflection seismic investigations in three major metallogenic regions: The Kevitsa Ni-Cu-PGE district (Finland), Witwatersrand goldfields (South Africa), and the Bathurst Mining Camp (Canada)
AuteurMalehmir, A; Koivisto, E; Manzi, M; Cheraghi, S; Durrheim, R J; Bellefleur, G; Wijns, C; Hein, K A A; King, N
SourceOre Geology Reviews vol. 56, 2014 p. 423-441, https://doi.org/10.1016/j.oregeorev.2013.01.003
Année2014
Séries alt.Secteur des sciences de la Terre, Contribution externe 20140414
ÉditeurElsevier
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1016/j.oregeorev.2013.01.003
Mediapapier; en ligne; numérique
Formatspdf
ProvinceNouveau-Brunswick
SNRC21P/12
Lat/Long OENS -66.0000 -65.5000 47.7500 47.5000
Lat/Long OENS 26.7500 26.7500 67.5000 67.3333
Lat/Long OENS 27.5000 27.5000 -26.8333 -27.2500
Sujetslevés sismiques; levés de reflexion sismiques; données sismiques; méthodes sismiques; gisements minéraux; gîtes minéralogiques; minéralisation; nickel; cuivre; platine; gîtes volcanogènes; Éléments du groupe de platine; géologie économique
Illustrationslocation maps; plots; profiles; block diagrams; seismic profiles; seismic images
ProgrammeÉtude des gîtes de sulfures massifs volcaniques, Initiative géoscientifique ciblée (IGC-4)
Résumé(disponible en anglais seulement)
Effective exploration for mineral deposits depends on a sound understanding of the processes and geological structures that contributed to their formation. The reflection seismic method has proven to be a powerful tool that provides a high-resolution image of the subsurface and information about structural and lithological relationships that control mineral deposits. The method has also become an attractive geophysical tool for deep exploration and mine planning. In this paper, we review the use of reflection seismic methods to obtain a better understanding of the architecture and ore-forming processes of three diverse mineral regions: the Kevitsa Ni-Cu-PGE district in Finland, the gold fields of the Witwatersrand Basin South Africa, and the Bathurst Mining Camp, Canada. Seismic data, both 2D and 3D, from the Kevitsa deposit clearly image the 3D geometry of the ore-bearing intrusion and provide information about its relationship to the host rock
units and nearby intrusions within a larger tectonic framework. 3D seismic data from the Witwatersrand Basin not only provide clear images of major structures, including a distinct reflection that acts as a marker horizon for the gold-bearing reef, but also provide information that may be useful in resolving a long-standing controversy regarding the origin of the gold in the Basin. For example, it might be possible to show that dykes formed impermeable barriers, thereby falsifying the epigenetic hydrothermal models. 2D and 3D seismic data from the Brunswick No. 6 area in the Bathurst Mining Camp suggest that the Brunswick horizon (which contains the bulk of the massive sulfide and associated iron deposits) occurs within a reflective package that extends down to at least 6-7 km depth.
GEOSCAN ID295798