GeoFile 2011-11: A Digital Atlas of Terranes for the Northern Cordillera

M. Colpron and J.L. Nelson

http://www.empr.gov.bc.ca/Mining/Geoscience/PublicationsCatalogue/GeoFiles/Pages/2011-11.aspx

The framework of the Cordilleran orogen of northwestern North America is commonly depicted as a ‘collage’ of terranes – crustal blocks containing records of a variety of geodynamic environments including continental fragments, pieces of island arc crust and oceanic crust. The series of maps available here are derived from a GIS compilation of terranes based on the map published by Colpron et al. (2007) and Nelson and Colpron (2007), and include modifications from recent regional mapping. These maps are presented here in a variety of digital format including ArcGIS file geodatabase (.gdb), shapefiles (.shp and related files) and Map Packages (.mpk), as well as in a number of graphic formats (Adobe Illustrator CS3, CorelDraw X3, PDF and JPEG). The GIS data includes individual terrane layers for British Columbia, Yukon and Alaska, as well as a layer showing selected major Late Cretaceous and Tertiary strike-slip faults. Graphic files derived from the GIS compilation were prepared for the Northern Cordillera (Alaska, Yukon and BC), the Canadian Cordillera (BC and Yukon), Yukon, and British Columbia. These maps are intended for page-size display (~1:5,000,000 and smaller). Polygons are accurate to ~1 km for Yukon and BC, and ~5 km for Alaska. More detailed geological data are available from both BC Geological Survey and Yukon Geological Survey websites. Descriptions of the terranes, their tectonic evolution and metallogeny can be found in Colpron et al. (2007), Nelson and Colpron (2007), Colpron and Nelson (2009), and references therein.


The terrane map project is a collaborative effort of the BC Geological Survey and Yukon Geological Survey.

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Most provincial geoscience data can be easily accessed over the internet in map format at:

http://www.mapplace.ca/ and through various thematic pages at www.empr.gov.bc.ca/Mining/Geoscience

Printed BC Geological Survey geoscience publications are available from Crown Publications Inc.

Tel: 250-387-6409 Fax: 250-387-1120

Email: crown@pinc.com Website: www.crownpub.bc.ca/

Questions or to update your contact info please contact the BC Geological Survey:

Email: Geological.Survey@gov.bc.ca Tel: 250-952-0372 Fax: 250-952-0381

BC Geological Survey

British Columbia Ministry of Energy and Mines

Mines and Mineral Resources Division

Release Notification 2011-16

December 12, 2011