GEOPHYSICAL SERIES - LAKE RAMUSIO AND LAKE ATTIKAMAGEN GEOPHYSICAL SURVEYS: SCHEFFERVILLE REGION, LABRADOR AND QUÉBEC (PARTS OF NTS MAP AREAS 13L, 13M, 23I, 23J, 23O AND 23P)
    R. Dumont, R. Fortin, S. Heffort and F. Dostaler (Geological Survey of Canada), 2010.

These surveys were carried out under the Geomapping for Energy and Minerals (GEM) Program of the Earth Sciences Sector, Natural Resources Canada.  The high-resolution survey, completed by the Geological Survey of Canada, fulfills part of a joint geoscience program with the Direction Générale de géologie Québec, ministère des Ressources naturalles et de la Faune du Québec and the Geological Survey Division, Newfoundland and Labrador Department of Natural Resources.

The results from each 1:50 000 scale NTS map area covered by this survey are released as a map series, with 10 maps in each series (each row in the grid below).  The Lake Attikamagen survey comprises 15 map series and the companion Lake Ramusio survey (Schefferville East) consists of 10 map series, for a total of 250 maps.

The 10 maps in each series are (text strings in brackets are the abbreviated column headings in the table below):

1. Natural Air Absorbed Dose Rate (NADR)


2. Potassium (Pot)


3. Uranium (Ura)


4. Thorium (Tho)


5. Uranium/Thorium Ratio (Ratio U/Th)


6. Uranium/Potassium Ratio (Ratio U/K)


7. Thorium/Potassium Ratio (Ratio Th/K)


8. Ternary Radioelement Map (Ternary)


9. Residual Magnetic Field (Mag Resid.)


10. First Vertical Derivative of the Magnetic Field (Mag 1VD)