Diamond drill hole database for the Purcell Basin

Joseph, J; Brown, Dorothy A.; Walker, Richard

doi:10.4095/288015

Cited by 1 publication

(2 citation statements)

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“…with more than 1000 lithostratigraphic markers (Schetselaar et al, 2015), subsurface data from the Sullivan Mine (more than 4000 drillhole logs; for details, see Montsion et al, 2015), and surface-mapped contacts as well as more than 11,000 surface structural measurements, including bedding and foliation (for details, see Joseph et al, 2011aJoseph et al, , 2011b. In addition, all 2D seismic profiles acquired from previous projects (Cook and Van der Velden, 1995) and 2D potential field forward models (Thomas et al, 2013) were imported into the 3D GIS database.…”

Section: Data Analysis/methodologymentioning

confidence: 99%

“…The main objective of developing the regional-scale Purcell 3D model was to provide a wider spatial perspective of the structural and stratigraphic geology of the subsurface focusing on the SEDEX hosting horizon in the East Kootney region. Building on a major synthesis volume of the Sullivan Mine (Lydon et al, 2000a) and regional geologic compilations including a 1:250,000 scale effort (Höy et al, 1995), a 2D GIS geoscience data compilation (nine Open File 1:50,000 scale geology maps covering NTS 82F01 , 02, 07, 08, 09, 10, 15, 16, 82G04, 05, 12, 13), (Brown et al, 2011;Joseph et al, 2011aJoseph et al, , 2011b, a reprocessed seismic compilation (Cook and Van der Velden, 1995), and using British Columbia TRIM Digital Elevation Model for vertical control, an initial 3D data set was developed for the Purcell Anticlinorium. This was supplemented with inclusion of identified markers and 3D path calculation from information contained in regional legacy drillhole logs (for details, see Schetselaar et al, 2015).…”

Section: Objective and Scopementioning

confidence: 99%

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Assessing the workflow for regional-scale 3D geologic modeling: An example from the Sullivan time horizon, Purcell Anticlinorium East Kootenay region, southeastern British Columbia

et al. 2016

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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.

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