| Titre | Assessing the workflow for regional scale 3D geological modelling: an example from the Sullivan time horizon, Purcell Anticlinorium, East Kootenay region, southeastern British Columbia |
| Auteur | de Kemp, E A; Schetselaar, E M; Hillier, M J; Lydon, J W; Ransom, P W |
| Source | Special section: Building complex and realistic geologic models from sparse data; par Caumon, G; Jessell, M; de Kemp, E A; Nemeth, B; Peron, G; Schetselaar, E M; Interpretation vol. 4, issue 3, 2016 p.
SM33-SM50, https://doi.org/10.1190/INT-2015-0191.1 (Accès ouvert) |
| Année | 2016 |
| Séries alt. | Secteur des sciences de la Terre, Contribution externe 20150472 |
| Éditeur | Society of Exploration Geophysicists |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1190/INT-2015-0191.1 |
| Media | papier; en ligne; numérique |
| Formats | pdf; html |
| Province | Colombie-Britannique |
| SNRC | 82F/01; 82F/02; 82F/07; 82F/08; 82F/09; 82F/10; 82F/15; 82F/16; 82G/04; 82G/05; 82G/12; 82G/13; 82J/04; 82K/01; 82K/02 |
| Lat/Long OENS | -117.0000 -115.5000 50.2500 49.0000 |
| Sujets | gîtes sédimentaires; établissement de modèles; trous de forage; simulations par ordinateur; cartographie par ordinateur; applications par ordinateur; Anticlinorium de Purcell ; géomathématique;
sédimentologie; géologie régional; géologie structurale |
| Illustrations | location maps; 3-D models; geological sketch maps; stratigraphic columns; photographs; schematic diagrams |
| Programme | Initiative géoscientifique ciblée (IGC-4), Étude des gîtes de SEDEX |
| Diffusé | 2016 07 04 |
| Résumé | (disponible en anglais seulement)
We have developed a regional-scale 3D geologic model, highlighting the Mesoproterozoic Sullivan time horizon (approximately 1470 Ma) throughout the Purcell
Anticlinorium in the East Kootenay region. This 3D geospatial model of the region is constrained with an extensive surface and subsurface database of stratigraphic, structural, and geophysical observations distributed throughout the study area. This
modeling exercise was conducted over a four-year period from 2011 to 2015 in which several iterations of the model were produced. The final model includes what is locally referred to as the Lower-Middle Aldridge stratigraphic contact (LMC), a map
unit at the very top of the lower Aldridge Formation where the Sullivan world-class Pb-Zn-Ag deposit is located. Local mineral exploration initiatives focus on this key exploration target horizon, which is now modeled in 3D. The regional LMC model
provides a much needed geospatial reference used to characterize and understand sedimentary exhalative, a type of ore deposit (SEDEX) ore systems as well as a key 3D exploration target. Developing regional 3D geologic models for orogenic interiors
such as the Purcell region, and older shield regions is a challenge. This is largely due to data sparsity at depth, lack of standards for 3D data collection, storage, integration, and interpretation practice. Current algorithms use only a partial set
of available observational or knowledge constraints and exist in workflows that do not allow for complicated geologic event histories. We have mitigated some of these challenges with a new implicit algorithm (SURFE), applied in this Purcell case
study, to estimate major regional faults and horizons through variably distributed and clustered data. These modeled geologic elements are then fed into the SKUA structural and stratigraphic workflow to produce the volumetric model. Reflection on the
general 3D modeling workflow for these regional situations highlights the need for embedding more knowledge constraints into the process. |
| Résumé | (Résumé en langage clair et simple, non publié)
Nous présentons une étude de l¿intégration à l¿échelle régionale, de données géoscientifiques 3D centrée sur la reconstruction informatique d¿un
horizon sédimentaire sous-jacent. L¿étude intègre les données d¿exploration minérale de la région de Kootenay-Est dans la chaîne Purcell près de Cranbrook (Colombie-Britannique). L¿horizon d¿intérêt est une cible importante pour l¿exploration
minérale (Pb Zn, Ag). Il contient la mine Sullivan, une exploitation de classe mondiale et historiquement l¿une des plus importantes productrices du Canada, qui a contribué un total de 50 milliards de dollars canadiens (valeur actuelle nette) à notre
économie. Nous résumons les données et les méthodes utilisées pour l¿étude et faisons des recommandations visant à accroître notre innovation dans l¿exploration minérale, par le recours à des méthodes de calcul avancées dans les trois
dimensions. |
| GEOSCAN ID | 297805 |
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