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Structural controls on geometry and ore distribution in the Lalor auriferous VMS deposit, Snow Lake, west-central Manitoba (part of NTS 63K16): preliminary results from underground mapping.

Caté, Antoine; Mercier-Langevin, Patrick; Ross, Pierre-Simon; Simms, Darren (2014). Structural controls on geometry and ore distribution in the Lalor auriferous VMS deposit, Snow Lake, west-central Manitoba (part of NTS 63K16): preliminary results from underground mapping. In: Report of Activities 2014,. Manitoba Mineral Resources, Manitoba Geological Survey, Winnipeg, p. 104-115.

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Résumé

The Lalor volcanogenic massive-sulphide deposit is the largest deposit in the Snow Lake mining camp and is also the richest in terms of total contained Au. The deposit is affected by polyphase deformation that has strongly influenced the geometry of the ore zones and the distribution of metals. Underground mapping has been completed at several selected locations in the mine to document the effects of deformation on the geometry of the deposit. Two regional deformation events (D2 and D3) strongly influenced the macroscopic geometry of the deposit, whereas early (D1) deformation features have been obliterated by later events and their importance is still not clear. Local remobilization of some base- and precious-metal sulphide minerals out of the primary massive-sulphide lenses occurred during deformation and led to epigenetic reconcentration of ore. These observations will assist in characterizing the structural setting and geometry of the Lalor deposit.

Type de document: Chapitre de livres
Mots-clés libres: structural geology; metallic minerals; structural controls; volcanogenic deposits; sulphide deposits; gold; alteration; mineralization; Lalor deposit; Precambrian
Centre: Centre Eau Terre Environnement
Date de dépôt: 08 mai 2018 17:45
Dernière modification: 08 mai 2018 17:45
URI: http://espace.inrs.ca/id/eprint/3749

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