| Titre | Indicator mineral and till geochemical signatures of the Broken Hammer Cu-Ni-PGE-Au deposit, North Range, Sudbury Structure, Ontario, Canada |
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| Auteur | McClenaghan, M B ;
Ames, D E; Cabri, L J |
| Source | Geochemistry: Exploration, Environment, Analysis 2019 p. 1-20, https://doi.org/10.1144/geochem2019-058  Accès ouvert |
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| Année | 2019 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20190313 |
| Éditeur | Geological Society |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1144/geochem2019-058 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Province | Ontario |
| Région | Broken Hammer; Sudbury; Sudbury Structure |
| Lat/Long OENS | -81.6667 -80.6833 47.0000 45.2500 |
| Sujets | sperrylite; chalcopyrite; or; pyrite; monzonites quartzifères; millérite; minéraux métalliques; Sciences et technologie |
| Illustrations | cartes de localisation; cartes géologiques généralisées; diagrammes à secteurs |
| Programme | Initiative géoscientifique ciblée (IGC-5) Systèmes minéralisés intrusions/porphyriques - processus porphyriques - minéraux marqueurs |
| Diffusé | 2019 12 05 |
| Résumé | (disponible en anglais seulement)
The Broken Hammer Cu-Ni-PGE-Au footwall deposit in the North Range of the Sudbury Structure in Canada consists of a shallow surface zone of vein-hosted and vein
stockwork-hosted mineralization within Sudbury breccia developed in the quartz monzonite Levack Gneiss Complex. The surface of the deposit consists of a 2-120 cm wide chalcopyrite vein and numerous smaller veins dominated by
chalcopyrite-magnetite-millerite with trace gold, platinum group minerals, tellurides, bismuthides and selenides. The Laurentide Ice Sheet flowed southward across the region depositing a sandy till that contains abundant sperrylite (hundreds of
grains), chalcopyrite, pyrite and gold in the heavy mineral fraction down-ice of mineralization. Mineral liberation analysis of the <0.25 mm heavy mineral fraction of metal-rich till identified a broader suite of PGM and sulfides than visual
identification methods. The <0.063 mm fraction of till displays a strong geochemical signature of the mineralization for Pd, Pt, Au, Cu and Ag and, to a lesser extent, Bi, Te and Sn; however, geochemical signatures are not detectable as far down-ice
as indicator minerals. Till sampling has not been used for exploration in the Sudbury region because of the abundant outcrop and the use of geophysical and prospecting techniques. This study demonstrates that indicator mineral and till geochemical
methods are useful exploration tools for the region. The presence of sperrylite and chalcopyrite in oxidized till indicates that even thin (<1 m) highly weathered till is an effective sample medium here. |
| Sommaire | (Résumé en langage clair et simple, non publié)
Cet article de journal rapporte les signatures minérales et géochimiques de surface indicatrices d'un gisement de cuivre - Groupe du platine
dans le camp minier de Sudbury. Les données seront utiles à ceux qui explorent la région de Sudbury et ailleurs sur le terrain glacié du Canada. La recherche a été financée par l'Initiative géoscientifique ciblée de la Commission géologique du
Canada. |
| GEOSCAN ID | 321056 |
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