| Titre | Initial results of weights-of-evidence modelling to assess the mineral potential of the Lucas-Crawford area, Timmins, Ontario |
| |
| Auteur | Honarvar, P; Barrie, C T; Harris, J R |
| Source | GIS for the earth sciences; par Harris, J R (éd.); Geological Association of Canada, Special Paper 44, 2006 p. 99-114  Accès ouvert |
| Liens | Online - En ligne
|
| Année | 2006 |
| Séries alt. | Commission géologique du Canada, Contributions aux publications extérieures 2003204 |
| Éditeur | Association géologique du Canada (St. John's, NL, Canada) |
| Document | publication en série |
| Lang. | anglais |
| Media | papier; CD-ROM |
| Référence reliée | Cette publication est contenue dans GIS for the
earth sciences |
| Formats | pdf (Adobe Reader) |
| Province | Ontario |
| SNRC | 42A/11; 42A/14 |
| Région | Lucas-Crawford area; Timmins |
| Lat/Long OENS | -81.5000 -81.0000 49.0000 48.5000 |
| Sujets | techniques de cartographie; cartographie par ordinateur; potentiel minier; établissement de modèles; modélisation numérique de terrain; ceintures de roche verte; gîtes sulfureux; modèles; géologie
générale; géochimie; géomathématique; minéralogie |
| Illustrations | cartes de localisation; cartes géologiques généralisées; tableaux; formules; graphiques |
| Programme | Ontario Mineral Exploration
Technologies (OMET) Program |
| Résumé | (disponible en anglais seulement)
A mineral potential mapping study is presented to highlight the gold and base-metal potential in an area of thick glacial cover in the Abitibi Greenstone Belt
of Ontario. This area is within 45 km of the prolific Porcupine gold district and with-in 15 km of the giant Kidd Creek volcanogenic massive sulfide deposit. Evidentiary geochemical, geological, and air-borne geophysical layers are compared to the
spatial distribution of 39 mineral prospects, occurrences and one small deposit (geological resource of 150,000 metric tonnes at 0.10 oz./T Au) for a 10 by 20 km area, using a GIS-basedweights-of-evidence modelling technique. A simple binary
evidentiary scheme is used for each data layer, where eachmulticlass map is analyzed by weights of evidence to determine the optimal threshold value for converting it to a binary map. Of the eleven layers considered, the layers with the highest
spatial association with known mineral occurrences are fault buffers, apparent conductivity, magnetic field, Au index, EM x-coil decay constant, Eu anomaly values, Cu-Zn index and buffered contacts. These layers are then combined in a log-linear
model using the weights-of-evidence method to build a mineral potential map. The final mineral potential map highlights three new target areas for gold and base-metal potential. The associated uncertainty map provides further information to
prioritize the targets. This logical and systematic modelling exercise is an excellent, relatively unbiased procedure for developing new exploration targets in areas of thick glacial cover, where a significant number of occurrences or deposits are
known within a study area |
| GEOSCAN ID | 224113 |
|
|