Details: This map, in Universal Transverse Mercator projection, shows the geology and mineral deposits of the Belt-Purcell Basin area of Southeast British Columbia. This map was built by D.G. MacIntyre and Associates Ltd. on contract to Natural Resources Canada as part of a Targeted Geoscience Initiative (TGI-3) program, covering the Belt Purcell Basin and Kootenay Arc regions of southeastern B.C. This map is one of the components of GeoFile 2007-2. Other components include GIS files for download.
View Belt-Purcell Metallogenic Map
As described by Trygve Höy, the Belt-Purcell basin is a Middle Proterozoic intracratonic basin with an early synrift fill succession, represented by the Prichard Formation in the U.S. and Aldridge Formation in Canada. The Aldridge and Prichard formations are dominated by deep-water turbidites that contain numerous mafic sills and a variety of base metal deposits including the massive to stratiform Sullivan Sedex deposit (MINFILE 082FNE052).
The information contained within the Belt-Purcell map is organized in such a way as to highlight the mineral resource potential of this important metallogenic belt. This has been done by creating separate layer groups containing information relevant to the exploration for specific deposit types, such as the economically important Sedex deposits. The geological layers that are part of the Belt-Purcell map were created by converting Geoscience Map 1995-1, a regional compilation map in AutoCad drawing format published by the B.C. Geological Survey Branch in 1995 (Höy et al., 1995), to ESRI shape file format. Additional detailed geology around the Sullivan deposit was added from Geoscience Map 2004-1 which covers the St. Mary’s map sheet (Höy and Jackaman, 2004). The area included in the Belt-Purcell compilation covers map sheets 082G, 082F, 082E and parts of 082J and 082K.
The Legend Window is organized into themes. Administrative layers are at the top, followed by mineral occurrence, ARIS, RGS and mineral title layers. Landuse planning and topographic layers, including TRIM, are in the middle of the legend window. Below these are a series of metallogenic layer groups designed to highlight the distribution and exploration potential for a number of key deposits types such as Sedex deposits that are hosted by the Middle Proterozoic Aldridge Formation. Each layer group contains MINFILE, RGS and geology layers that are relevant to the particular deposit type. Below the metallogenic layer groups are the regional geology layers follow at the bottom of the legend window by various raster layers (LandSat, DEM and Aeromagnetics).
Topographic layers are also arranged into layer groups. The information displayed when a layer group, for example rivers, is turned on will depend on the scale that the map is zoomed in to. Below a zoom scale of 1:100,000 topographic layers are mainly from TRIM (Terrain Resource Information Management). These layers include Transport Structures, Rail, Roads, Rivers, Lakes, Land Cover and Contours.
A key objective of the Belt-Purcell project was to generate a series of GIS compatible data files that could be downloaded and incorporated into standard GIS software packages. Below is a list of the files currently available. The files are available as ESRI shape files because this format can be used in almost all commercially available GIS packages including ESRI’s free Arc Explorer. Two projections are currently available – UTM and Geographic. Also included for download is a Manifold GIS Map file that contains all of the layers used to build the Belt-Purcell metallogenic map. Manifold also supports the creation of Google Earth files for specific layers and a number of these have been generated for the project area.
Höy, T., Price, R.A., Legun, A., Grant, B. and Brown, D. (1995): Purcell Supergroup, Southeastern British Columbia, Geological Compilation Map (82G, F, E; 82J/SW, 82K/SE); B.C. Ministry of Energy and Mines, Geoscience Map 1995-1, scale 1:250,000.
Höy, T. and Jackaman, W. (2004): Geology of the St. Mary map sheet (NTS 82F/09); Ministry of Energy and Mines, Geoscience Map 2004-1, scale 1:50,000.
Tectonostratigraphic Map Purcell Supergroup (841KB in PDF), after Trygve Hoy, Derek Brown and others, produced in MapInfo by Kennecott Canada Exploration Inc., April 19, 1999. From Purcell Anticlinorium partnership to scan mineral Assessment Reports.
Contacts and Notes:
For more information contact: Don MacIntyre.