| Titre | Chapter 15: 3D seismic imaging for VMS deposit exploration, Matagami, Quebec |
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| Auteur | Adam, E; Perron, G; Arnold, G; Matthews, L; Milkereit, B |
| Source | Hardrock seismic exploration; par Eaton, D W (éd.); Milkereit, B (éd.); Salisbury, M H (éd.); Society of Exploration Geophysicists, Geophysical Developments Series no. 10, 2003 p. 229-246, https://doi.org/10.1190/1.9781560802396.ch15 |
| Année | 2003 |
| Séries alt. | Commission géologique du Canada, Contributions aux publications extérieures 2000157 |
| Éditeur | Society of Exploration Geophysicists |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1190/1.9781560802396.ch15 |
| Media | papier; en ligne; numérique |
| Référence reliée | Cette publication est contenue dans Hardrock
seismic exploration |
| Formats | pdf |
| Province | Québec |
| SNRC | 32F |
| Région | Matagami |
| Lat/Long OENS | -78.0000 -76.0000 50.0000 49.0000 |
| Sujets | exploitation minière; mines; activités minières; méthodes sismiques; exploration pétrolière; méthodes d'exploration; gîtes volcanogènes; gîtes sulfureux; filons-couches; interpretations sismiques;
prospection minière; Archéen; géologie économique; géophysique; minéraux métalliques; pétrologie ignée et métamorphique; combustibles fossiles |
| Illustrations | cartes de localisation; cartes géologiques généralisées; graphiques; tableaux; profils de réflexion sismique |
| Programme | Programme des partenaires industriels
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| Diffusé | 2012 03 21 |
| Résumé | (disponible en anglais seulement)
Detecting deep mineral resources in the vicinity of existing mining camps is expensive and time consuming. The 3D seismic method is used routinely in oil and
gas exploration to map deep stratigraphic contacts and structural features. Its ability to map volcanic contacts and the 1-km deep Bell Allard volcanogenic massive sulfide (VMS) deposit was tested recently in the Matagami mining camp. The survey
objectives were to identify the seismic response of a VMS ore deposit and to map the main lithological contacts. The Bell Allard VMS deposit appears as a 100 m wide zone of high seismic amplitudes. The deposit is underlain by a larger amplitude
anomaly that we attribute to a gabbro sill, or possibly to the alteration zone of the deposit. We show that the depth of the main exploration target (the Key Tuffite) can be identified on a large portion of the seismic survey area and that its
southwest limit defines the location of a regional fault (the Daniel fault). The azimuth and dip of a synvolcanic fault was determined from amplitude analysis of a large gabbro sill. The Matagami 3D seismic experiment shows that seismic methods can
image a deep VMS deposit and map important lithological contacts at a regional scale at a cost comparable to two 800-m deep boreholes per square kilometer. When applied in the appropriate geological context, a 3D seismic survey has the potential to
assist deep mineral exploration and increase the chances of making cost-effective discoveries. |
| GEOSCAN ID | 211715 |
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