The MapPlace - 2005 Geophysical Surveys
High Sensitivity Airborne Gamma-Ray
Spectrometric and Aeromagnetic Surveys Central BC
GSC Open Files:
5284,
5285,
5286,
5287,
5288,
5289,
5290,
5291,
5292,
5293 by J.M. Carson, R. Dumont, J.
Potvin, R.B.K. Shives, B.J.A. Harvey, J. Buckle, B. Lane, M. Cathro (10 open
files, 10 sheets each). |
 |
| Details: The Geological
Survey of Canada released multisensor (gamma ray spectrometric and magnetic)
airborne geophysical information for 10 areas of central British Columbia.
These surveys were conducted by Fugro Airborne Surveys under contract to the
Geological Survey of Canada (GSC). They were funded by a number of
provincial, industry and First Nation partners, including the British
Columbia and Yukon Chamber of Mines' "Rocks to Riches" program, Richfield
Ventures Corp., Amarc Resources Ltd., Yekooche First Nation, Yankee Hat
Minerals Ltd., Serengeti Resources Inc., and GWR Resources Inc., and
supported by Natural Resources Canada as part of the Earth Sciences Sector's
Northern Resources Development Program. We would
like to acknowledge Cal Data Inc. for the image processing into
georeferenced TIFF and PNG images.
View
2005 Geophysical Surveys Map
How the Magnetic and
Radiometric Maps Can be Used:
Multiparameter (gamma-ray, magnetic) geophysical surveys
are useful in mineral exploration and bedrock mapping studies. In the
Quesnel Trough, these surveys are particularly useful in exploring for
alkalic porphyry Cu-Au porphyry deposits like Mt. Polley, or related
deposits like QR. The potassium,
potassium/thorium, magnetic total field and magnetic
vertical gradient maps can be used to help identify potassic
alteration and magnetite enrichment/depletion zones associated with
copper-gold mineralization, and also help in mapping lithologies and
structures. For additional information on the GSC NATGAM program and
interpretation of radiometric maps, go to
http://gsc.nrcan.gc.ca/gamma/index_e.php.
Survey Summary:
In 2004 and 2005, Fugro Airborne Surveys completed nine
multi-sensor airborne geophysical surveys in the central region of British
Columbia for the Geological Survey of Canada, the British Columbia and Yukon
Chamber of Mines, Yekooche First Nation, and five industry partners,
including Serengeti Resources Inc., Yankee Hat Minerals Ltd.,Richfield
Ventures Corp.,GWR Resources Inc., and Amarc Resources Ltd. The Geological
Survey of Canada provided survey supervision and quality control. The
purpose of the surveys was to obtain quantitative gamma-ray spectrometric
and aeromagnetic data. The surveys were flown over two seasons, from
September 18 to November 17, 2004 and June 15 to August 8, 2005 using AStar
350-B2 and 350-B3 helicopters, C-GECL and C-FGSC.
| GSC Open
File |
NTS sheet (parts of) |
Title |
Scale |
|
5284 |
93N/6,
93N/10, 93N/11, 93N/7 |
Indata Lake |
1:50 000 |
|
5285 |
93N/8,
93O/5 |
Sylvester Creek |
1:50 000 |
|
5286 |
93N/1,
93K/16 |
Wittichica Creek |
1:20 000 |
|
5287 |
93K/6,
93K/7, 93K/3, 93K/2 |
Taltapin Lake |
1:20 000 |
|
5288 |
93G/1,
93G/8, 93B/16 |
Cottonwood |
1:50 000 |
|
5289 |
93H/4,
93A/13 |
Wells |
1:50 000 |
|
5290 |
93A/12 |
Hydraulic |
1:50 000 |
|
5291 |
92P/14 |
Lac La Hache |
1:20 000 |
|
5292 |
93A/3,
93A/2, 93A/6, 93A/7, 92P/14 |
Eagle (Murphy) Lake |
1:50 000 |
|
5293 |
93A/2,
93A/3, 92P/14, 92P/15 |
McKinley Creek |
1:50 000 |
Digital profile and gridded data for this survey can be
downloaded free of charge from the
Geoscience Data Repository
of ESS Geophysical and Geochemical data. Customized line and/or gridded
digital data may be obtained, for a fee, from the Radiation Geophysics
Section, Ottawa: Telephone: (613) 996-3695 or (613) 995-1235; Fax: (613)
996-3726; E-mail: natgam@nrcan.gc.ca.
Geophysical variables
include:
 | Natural air absorbed dose rate (nGy/h) |
| Potassium (%) |
| Uranium (ppm) |
| Thorium (ppm) |
| Uranium/thorium |
| Uranium/potassium (ppm/%) |
| Thorium/potassium (ppm/%) |
| Ternary radioelement image |
| Residual total magnetic field (nT) |
Analogue and
digital products include data for eight radiometric and two magnetic
parameters:
|
This page was last updated
August 01, 2006. |
