GEOSCAN, résultats de la recherche

Menu GEOSCAN


Auteurde Kemp, E A; Schetselaar, E M; Hillier, M J; Lydon, J W; Ransom, P W
SourceAssessing the Workflow for Regional Scale 3D Geological Modelling: An Example from the Sullivan Time Horizon, Purcell Anticlinorium East Kootenay Region, Southeastern British Columbia; par de Kemp, E A; Schetselaar, E M; Hillier, M J; Lydon, J W; Ransom, P W; .
Séries alt.Secteur des sciences de la Terre, Contribution externe 20150472
ÉditeurSociety of Exploration Geophysicists
Lang.anglais
Mediapapier
ProvinceColombie-Britannique
SNRC82F/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
Sujetsgîtes sédimentaires; établissement de modèles; trous de forage; simulations par ordinateur; cartographie par ordinateur; applications par ordinateur; géomathématique; sédimentologie; géologie régional; géologie structurale
Illustrationslocation maps; 3-D models; geological sketch maps; stratigraphic columns; photographs; schematic diagrams
ProgrammeÉtude des gîtes de SEDEX, Initiative géoscientifique ciblée (IGC-4)
Résumé(disponible en anglais seulement)
A Regional scale 3D geological model, highlighting the Mesoproterozoic Sullivan time horizon (~ 1470 Ma) has been developed throughout the Purcell Anticlinorium in the East Kootenay region. The 3D geospatial model of the region has been constrained with an extensive surface and sub-surface database of stratigraphic, structural and geophysical observations distributed throughout the study area. The modelling exercise was conducted over a 4 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 'LMC' or Lower - Middle Aldridge stratigraphic contact, 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 modelled in 3D. The regional LMC model, provides a much needed geospatial reference used to characterize and understand SEDEX ore systems as well as a key 3D exploration target.
Developing regional 3D geologic models for orogenic interiors such as the Purcell region, as well as 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. To mitigate some of these challenges a new implicit algorithm (SURFE) is applied in the Purcell case study to estimate major regional faults and horizons through variably distributed and clustered data. These modelled geologic elements are then feed into the SKUA® structural and stratigraphic workflow to produce the volumetric model. Reflection on the general 3D modelling 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 ID297805