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Ministry of Energy Mines and Responsible for Core Review

Tisdall Lake Geophysical Survey
(Parts of NTS 92P/15, 93A/2, 3,6,7)

BCMEMPR Open File 2005-16

Helicopter-borne gamma ray spectrometric and magnetic total 
field geophysical survey, Tisdall Lake Area, British Columbia

by Shives
, R.B.K., Carson, J.M., Dumont, R., Holman, P.B., Yeager, D., Geological Survey of Canada


In 2004 the Geological Survey of Canada conducted a multisensor (gamma-ray spectrometric, magnetic total field) helicopter-borne geophysical survey in the Tisdall Lake Area, southeast of Mount Polley, British Columbia, Canada. Flight lines were oriented NE-SW, spaced at 250 m intervals. The survey was flown under contract by Fugro Airborne Surveys. Funding was provided by Amarc Resources Ltd.  Support for the Geological Survey of Canada’s Radiation Geophysics Section, acting as the Scientific Authority for the survey, was provided under Natural Resources Canada – Earth Sciences Sector’s Northern Resources Development Program.


This survey was published with the Quesnel Geophysics Map to MapPlace on April 8, 2005.  The MapPlace data includes digital gridded images for 2 magnetic and 7 radiometric parameters for each survey area. The downloadable files from this website are in georeferenced TIF – tagged image and PNG formats (UTM NAD 83 and Albers projections) and GRD - Geosoft gridded data format (UTM NAD 83 only). PDF theme files are also available. 


A full product release of the Tisdall Lake survey and the 2005 Eagle (Murphy) Lake-McKinley Creek surveys were made July 2006 by the Geological Survey of Canada as Open File 5292, with free download and  Open File 5293, with free download  from GEOSCAN.  This compilation is displayed on MapPlace as the 2005 Geophysical Surveys Map.  The original GSC Geosoft gridded data format (.grd) is available for download.


All publications of the BC Geological Survey are available digitally, free of charge, from this website.


For questions or more information on geology and minerals in British Columbia contact BCGS Mailbox or call toll free (BC Residents only).