| Titre | Mineral-potential mapping for MVT deposits with limited data sets using landsat data and geological evidence in the Borden Basin, Northern Baffin Island, Nunavut, Canada |
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| Auteur | Daneshfar, B; Desrochers, A; Budkewitsch, P |
| Source | Natural Resources Research; vol. 15, no. 3, 2006 p. 129-149, https://doi.org/10.1007/s11053-006-9020-7 |
| Année | 2006 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20181160 |
| Éditeur | Springer Nature |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1007/s11053-006-9020-7 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Province | Nunavut |
| Sujets | télédétection; géophysique |
| Programme | Direction du Centre canadien de télédétection |
| Diffusé | 2006 12 19 |
| Résumé | (disponible en anglais seulement)
Posterior probabilities of occurrence for Zn-Pb Mississippi Valley Type (MVT) mineralization were calculated based on evidence maps derived from regional
geology, Landsat-TM, RADARSAT-1, a digital elevation model and aeromagnetic data sets in the Borden Basin of northern Baffin Island, Canada. The vector representation of geological contacts and fault traces were refined according to their
characteristics identified in Landsat-TM, RADARSAT-1, DEM, slope, aspect, and shaded relief data layers. Within the study area, there is an association between the occurrence of MVT mineralization and proximity to the contact of platformal carbonates
and shale units of the adjacent geological formation. A spatial association also tends to exist between mineralization and proximity to E-W and NW-SE trending faults. The relationships of known MVT occurrences with the geological features were
investigated by spatial statistical techniques to generate evidence maps. Supervised classification and filtering were applied to Landsat-TM data to divide the Society Cliffs Formation into major stratigraphic subunits. Because iron oxides have been
observed at some of the MVT occurrences within the Borden Basin, Landsat-TM data band ratio (3/1) was calculated to highlight the potential presence of iron-oxides as another evidence map. Processed Landsat-TM data and other derived geological
evidence maps provided useful indicators for identifying areas of potential MVT mineralization. Weights of evidence and logistic regression were used independently to integrate and generate posterior probability maps showing areas of potential
mineralization based on all derived evidence maps. Results indicate that in spite of the lack of important data sets such as stream or lake sediment geochemistry, Landsat-TM data and regional geological data can be useful for MVT mineral-potential
mapping. |
| GEOSCAN ID | 311514 |
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