82°15' 82°10' 82°5' 82° 81°55' 81°50' 81°45' SURVEY PARAMETERS 407000 408000 409000 410000 411000 412000 413000 414000 415000 416000 417000 418000 419000 420000 421000 422000 423000 424000 425000 426000 427000 428000 429000 430000 431000 432000 433000 434000 435000 436000 437000 438000 439000 440000 441000 442000 443000 444000 445000 446000 447000 448000 Ontario MAGNETOMETER Campbell Lake Type: Fluxgate Ontario Geological Survey SURVEY SPECIFICATIONS BLOCK O1 1 Survey date: 1981 MAP 60 287 Nominal aircraft terrain clearance: 81 m Traverse line spacing: 250 m Control line spacing: various, 8000 to 16 000 m AIRBORNE MAGNETIC SURVEY
1 BLOCK O4 Residual magnetic field - 5 0 Survey date: 1981 Nominal aircraft terrain clearance: 126 m Traverse line spacing: 250 m Control line spacing: 7500 m OTTER RAPIDS AREA
1 Blocks O1 and O4 have been merged where overlap occurs. (West-Central) The data for all blocks are available in a digital data set (GDS 1228) HECLA TOWNSHIP KILMER TOWNSHIP that encompasses the Squirrel River, Otter Rapids and Moose River MCCLAUSLAND TOWNSHIP areas. Scale 1:50 000 SANBORN TOWNSHIP COORDINATE SYSTEM 1 km 0 2 km Projection: Universal Transverse Mercator Datum: NAD83 Central meridian: 81°00' W (UTM zone 17N) NTS References: 42 I/4,5; 42 J/1,8. Central scale factor: 0.9996 False easting: 500 000 m False northing: 0 m © Queen's Printer for Ontario, 2005.
This map is published with the permission of the Director, Ontario Geological Survey.
LEGEND
MAGNETIC CONTOURS
10 nT contour 1000 nT contour
50 nT contour Magnetic depression 200 nT contour
OTHER SYMBOLS Location map 1 cm equals 15 km (Some symbols may not apply to this map)
Power line Drainage DESCRIPTIVE NOTES Administrative 50 Road The original data acquisition was neither supervised by the boundary 2 0 0 Ontario Geological Survey (OGS) nor carried out to OGS technical specifications. However, the donated data do meet a Trail Railroad pre-defined valuation criteria set out by the OGS. Some quality assurance and quality control checks have been carried out on the digital data.
A complete set of digital data for the Squirrel River, Otter Rapids and Moose River surveys (see survey locations RESIDUAL MAGNETIC FIELD GRID overview figure below) is published as Geophysical Data Set (GDS) 1228. nanoteslas (nT) SURVEY LOCATIONS OVERVIEW
EMERSON TOWNSHIP 820 690 KIPLING TOWNSHIP ACRES TOWNSHIP 600 HAMLET TOWNSHIP 520 440 350 290 240 200 170 River 140 120 90 80 60 1 cm equals 30 km 40 10 SOURCES OF INFORMATION 0 0 -20 Topographic base map information derived from 1:250 000 -40 scale maps (42I and 42J) of the National Topographic Data Base, Centre for Topographic Information, Natural -60 Resources Canada. -90 -110 Township and area fabric derived from the following: Ontario -130 Ministry of Northern Development and Mines 2004. Township and unorganized area fabric for Ontario; Ontario Geological -160 Survey, Data Set 12. Long Rapids -200 -240 Magnetic declination in 2005 for the centre of the map area -300 was 11°3'W. (Calculated using the Canadian Geomagnetic Reference Field.)
CREDITS
Data donation by Aur Resources Limited is gratefully acknowledged by the Ontario Geological Survey.
Data acquisition and compilation by Questor Surveys or Northway Survey Corporation.
Data recovery, reformatting, tie-line levelling and georeferencing by GCT Consulting Services.
Processing of data including flight line editing, microlevelling, levelling to the Ontario Master Magnetic Datum and projections done by T.L. Muir, Precambrian Geoscience Section.
BRADLEY TOWNSHIP Contract management, base maps and map surrounds by Ontario Ministry of Northern Development and Mines, Sudbury, HARMON TOWNSHIP Ontario.
TRAILL TOWNSHIP To enable the rapid dissemination of information, this map has not received a technical edit. Discrepancies may occur for which the Ontario Ministry of Northern Development and Mines COCKSHUTT TOWNSHIP does not assume any liability. Users can verify critical Smoky Falls information from the corresponding digital profile, gridded and anomaly data distributed by the OGS.
Issued 2005.
Information from this publication may be quoted if credit is given. It is recommended that reference be made in the following form:
Ontario Geological Survey 2005. Airborne magnetic survey, 407000 408000 409000 410000 411000 412000 413000 414000 415000 416000 417000 418000 419000 420000 421000 422000 423000 424000 425000 426000 427000 428000 429000 430000 431000 432000 433000 434000 435000 436000 437000 438000 439000 440000 441000 442000 443000 444000 445000 446000 447000 448000 residual magnetic field, Otter Rapids area (west-central); 82°15' 82°10' 82°5' 82° 81°55' 81°50' 81°45' Ontario Geological Survey, Map 60 287, scale 1:50 000.