| Titre | Wireline logging and distributed acoustic sensing VSP to characterize host rocks and alteration of porphyry deposits: preliminary results from the New Afton mine |
| Télécharger | Téléchargement (publication entière) |
| Auteur | Bellefleur, G; Schetselaar, E M; Wade, D; White, D |
| Source | Targeted Geoscience Initiative: 2017 report of activities, volume 1; par Rogers, N (éd.); Commission géologique du Canada, Dossier public 8358, 2018 p. 9-14, https://doi.org/10.4095/306396 (Accès ouvert) |
| Année | 2018 |
| Éditeur | Ressources naturelles Canada |
| Document | dossier public |
| Lang. | anglais |
| DOI | https://doi.org/10.4095/306396 |
| Media | en ligne; numérique |
| Référence reliée | Cette publication est contenue dans Rogers, N;
(2018). Targeted Geoscience Initiative: 2017 report of activities, volume 1, Commission géologique du Canada, Dossier public 8358 |
| Formats | pdf |
| Province | Colombie-Britannique |
| SNRC | 92I/09; 92I/10 |
| Lat/Long OENS | -121.0000 -120.0000 50.7500 50.5000 |
| Sujets | gisements minéraux; prospection minière; potentiel minier; gisements porphyriques; métaux; cuivre; or; genèse des minerais; contrôles des minerais; contrôles structuraux; diagraphie géophysique; levés
géophysiques; levés acoustiques; levés sismiques; profils sismiques; roches hôtes; altération; système hydrothermal; magmatisme; concentration; établissement de modèles; géologie du substratum rocheux; lithologie; roches ignées; roches intrusives;
diorites; monzonites; roches volcaniques; picrites; basaltes; roches sédimentaires; caractéristiques structurales; failles; gisements minéraux d'hypogene; Cordillère canadienne; Formation d'Ashcroft ; Groupe de Kamloops ; Batholite d'Iron Mask ;
géologie économique; géologie structurale; géophysique; Phanérozoïque; Cénozoïque; Tertiaire; Mésozoïque; Jurassique; Trias |
| Illustrations | geoscientific sketch maps; lithologic sections; geophysical logs; graphs; seismic profiles |
| Programme | Gestion de la connaissance de IGC, Initiative géoscientifique ciblée (IGC-5) |
| Programme | Systèmes porphyriques, Initiative géoscientifique ciblée (IGC-5) |
| Diffusé | 2018 01 19 |
| Résumé | (disponible en anglais seulement)
Wireline logs and vertical seismic profile (VSP) data were acquired in two boreholes intersecting the Cu-Au New Afton porphyry deposit located near Kamloops,
British Columbia. The wireline logs and VSP data are components of an integrated geophysical imaging and 3D geological modelling study that aims to improve knowledge of the role of magmatic hydrothermal processes and structural controls in
concentrating metals in porphyry deposits. Log data provide physical rock properties for the propylitic, phyllic, and potassic alteration zones. Both propylitic and phyllic zones are characterized by a broad distribution of density and P-wave
velocities whereas the feldspar-dominant potassic alteration zone has generally high velocities. The VSP survey was conducted with a distributed acoustic sensing (DAS) system that utilized fibre-optic cables cemented in two boreholes at the New Afton
mine. Fibre-optic cables comprised standard and ConstellationTM fibres in both straight and helically-wound configurations for comparison purposes. Seismic sources consisted of fifty shot points each loaded with one kilogram of pentolite explosive
placed in a 20 m deep shot hole. VSP data from both types of fibre show clear down going waves and reflections although signal-to-noise ratio is significantly higher on the ConstellationTM fibre-optic cable. A preliminary analysis of VSP data from
one shot point shows reflections possibly associated with the potassic zone and the picrite unit located just below the bottom of the borehole. |
| GEOSCAN ID | 306396 |
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