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It is recommended that reference to the Content be made in the following form: Ontario Geological Survey 2014. Airborne magnetic and electromagnetic surveys, residual magnetic field contours with electromagnetic anomalies and Keating coefficients, Nestor Falls area; Ontario Geological Survey, Map 82 635, scale 1:20 000.
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L3100> L2981> L3040> L2741> L2681> L2921> L2861>
L2621>
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L L < L L L L2421> L 2 3 2 L 2 2 L T 3 8 1 4 8 5 2 5 2 1 0 2 0 0 2 0 8 7 1 3 1 0 1 7 1 1 9 0 0 > > > > > 1 94°05'19" 05' 04' 03' 02' 01' 94°00'00" 59' 58' 57' 1 56' 55' 54' 53' 52' 51' 50' 49' > 48' 47' 46' 45' 44' 93°43'00" 0 L2261> 0 0 422000 m 24 3 29 39 40 41 42 43 44 45 46 447000 m 23 25 26 27 28 30 31 32 33 34 35 36 37 38 0 000.0 4000.0 170 1 00.0 5 0 0 4 40 2 40 7 38 - 49°23'44" 0 0 112000.0 38 30 46 33 49°23'54" 3 90000.0 39 27 DESCRIPTIVE NOTES 0 0 0 1 116 29 135 2 VERTICAL PLATE NOMOGRAM 5 Whitefish Bay Whitefish Bay 32A < 3 88 31 78 30 66 25 5 0 L - 2 32A 74000.0 71 0 112000.0 2 102000.0 3 5 8 31 0 2 0 25000.0 3 5 0 86000.0 104000.0 1 0 0 - - 1 5 3 - 2 5 0 0 Introduction - 1 33 0 0 0 - - 2 5 0 139 11 - 88000.0 43000.0 5 0 1 4 6 31 3 33 4 334 5 27 - 1 33 2 32 0 3 7 23 1 0 38000.0 8 25 2 36000.0 37000.0 5 39000.0 40000.0 41000.0 1 31 3 37 0 0 - 3 5 0 4 114 17 T4080> 0 T4080> - Ontario Geological Survey 0 0 2 114 11 5 This survey was flown using the Geotech VTEM®Plus helicopter- 39000.0 42 8 122 9 59 6 61 12 57 9 216 1 0 101000.0 0 99000.0 162 3 2 57000.0 0 - 144 7 84 12 0 98000.0 0 0 81000.0 2 2 5 18000.0 88000.0 - 0 0 00 mounted magnetic and electromagnetic system. The aircraft 0 3 0 1 0 0 0 0 0 0 2 4 1 - . - . 0 1 5 0 1 0 8 0 0 105000.0 0 4 was also equipped with a GPS navigation system and a 0 7 32 0 7 1 0 0 0 99000.0 0 0 5 1 1 0 MAP 82 635 0 5 digital data acquisition system. 19000.0 0 - 1 . 0 0 74000.0 5 - 64000.0 0 105 11 3 . 5 0 0 3 0 0 5 9 5 76000.0 63000.0 4 1 34 65000.0 0 0 Residual Magnetic Field Map 0 2 5 24000.0 5 - 0 0 3 - 0 5 - 5 0 3 7 75000.0 5 0 1 0 . 5 AIRBORNE MAGNETIC AND 0 0 L2241> 0 - 0 107 20 0 2 1 2 - 0 8 44 2 The contours of residual magnetic intensity were generated 5 . 1 0 0 ELECTROMAGNETIC SURVEYS 0 0 from digitally recorded data. The magnetic data were corrected 49000.0 0 0 0 0 30 5 22 2 7 90000.0 2 0 0 . 0 5 0 0 for diurnal variations, levelled to the control lines and 5471000 m 0 0 5471000 m 0 0 3 4 0 0 0 5 81000.0 1 - 25000.0 - 0 1 0 2 3 0 2 2 2 0 - 5 interpolated onto a 40 m regular grid, using the minimum 0 - 0 - 5 0 0 0 0 1 - 0 0 47000.0 0 0 0 0 5 0 0 Residual magnetic field contours 0 1 2 0 0 1 2 0 Martin curvature algorithm. An International Geomagnetic Reference 0 - 1 < 41000.0 - 0 0 - 1 1 McKay Island 79000.0 7 L 5 2 0 - 1 5 Island 2 0 5 Field (IGRF) correction was applied to the total magnetic field 51000.0 5 5 with electromagnetic anomalies 0 0 0 2 70000.0 4 27 3 0 0 3 0 1 data at survey altitude using the 2010 model year extrapolated 1 0 0 34000.0 10 42 5 1 5 - 1 - . 0 5 23000.0 5 5 0 0 - 0 0 2 0 to March 1, 2014. A regional correction was applied to level the and Keating coefficients 9 37 133 4 0 0 5 56000.0 0 0 81000.0 0 23' 29 22 0 35000.0 0 5 7 44 2 - 0 magnetic field to the Ontario Master Aeromagnetic Grid. . 0 0 5 0 0 - 1 0 5 79 29 - - 0 0 0 4 24 5 0 3 2 29 23 53000.0 0 0 2 20 - - 5 1 64000.0 78000.0 0 57000.0 3 5 3 5 0 Magnetic declination from January 26, 2014 to March 1, 2014 45000.0 146 3 0 3 1 55000.0 0 6 4 0 0 0 NESTOR FALLS AREA 6 106000.0 0 0 109000.0 2 28 0 183 1 3 3 3 29 0 0 for the centre of the survey area was 0.1º W. Magnetic 0 5 - 2 0 3 4 2 0 61000.0 0 3 0 0 0 0 . - 2 - 0 58000.0 L2221> 0 9 5 0 0 0 5 inclination from January 26, 2014 to March 1, 2014 for the 0 1 0 0 6 5 5 128 3 5 0 65000.0 . 3 23' 130 7 5 0 0 - 6 0 3 . 0 0 5 0 0 0 2 5 0 5 5 9 27- 0 4 0 centre of the survey area was 74.7º N. Magnetic field strength 70000.0 1 0 0 2 5 SYSTEM CONFIGURATION 5 0 . - 0 3 28 0 5 0 0 . was 57183 nT (calculated using IGRF). 2 29 1 24 0 33000.0 0 25000.0 32000.0 68000.0 31000.0 30000.0 29000.0 28000.0 27000.0 26000.0 24000.0 123000.0 0 0 1 173 3 0 0 0 1 5 0 - 0 40000.0 0 1 6 5 0 Scale 1:20 000 1 4 20000.0 34000.0 - - 0 5 0 95 3 0 68000.0 37 3 2 0 - 61 2 6 0 3 9 5 4 6 0 2 0 0 0 0 EM Anomalies - 36000.0 0 0 5 9 0 108000.0 0 3 4 500 m 0 0.5 1 km 0 . 0 7 < 0 0 0 5 3 1 0 . 70 3 L 70 28000.0 - 0 1 - 0 2 5 8 2 0 9 2 0 82000.0 0 1 5 . 48000.0 5 The VTEM®Plus system will respond to conductive overburden, 0 0 0 1 0 Whitefish - 0 0 96000.0 0 1 5 1 22000.0 - 1 103000.0 0 0 . 3 near-surface horizontal conducting layers, man-made sources 0 90000.0 . 0 3 3 33 Bay 34A 0 67000.0 0 3 24000.0 33000.0 0 and bedrock conductors. Identification of natural conductors is 5 88000.0 86000.0 18000.0 0 0 3 32 0 5 3 0 Whitefish Bay 34A 0 . 4 0 100 8 5 NTS Reference: 52 E/8; F/5 0 3 based on the rate of transient decay, magnetic correlation and 100000.0 7 35 110000.0 0 - 135 14 5 32 3 5 2 0 50 Caviar Lake 0 111000.0 0 Whitefish Bay 22000.0 0 0 response shape, together with the response pattern and - 5 0 11 23 3 0 33m 1 92000.0 3 4 - 123000.0 0 109 21 (Lake of the Woods) 1 0 2 topography. Man-made responses are identifiable by examining 139 13 0 0 0 1 3 - 0 © Queen's Printer for Ontario, 2014. 5 45000.0 5 - 0 0 0 0 0 35000.0 5 2 0 - 0 0 0 3 182 1 87000.0 2 0 the power line monitor and the flight track video. 3 26 120000.0 - Snake Bay L2201> Magnetometer 4 3 0 0 This map is published with the permission of the Director, 8 0 6 24 0 0 0 126 2 1 0 - 113000.0 89000.0 87000.0 46000.0 Anomalies were classified as having an inductively thin source, 0 3 2 Ontario Geological Survey. 85000.0 0 0 1 18000.0 - 0 5 186 . 4 0 0 Dogpaw Lake which produces a double-peaked (M-shaped) response with the 0 5 57m 105000.0 47m 8 80000.0 0 5 103000.0 5 0 56000.0 Whitefish Bay 33A 2 0 trough centered over the conductor, or as an inductively thick 0 0 2 0 0 2 5 - - 0 0 0 0 66000.0 0 0 1 42000.0 2 . Eagle Lake 27 2 Rat < source, which produces a single-peaked response centered over 0 0 - 0 Kenora 4 le MAY 0 0 5 Portage 94° 0 L 93° 0 38B 5 1 71 6 0 98000.0 5 - 2 38A KIRKUP McMEEKIN 5 0 - 0 75000.0 the conductor. The anomaly source conductance was computed Eagle 0 LAKE 1 3 1 1 0 3 0 - 2 0 Lake 6 31 5 18 9 1 1 0 0 5 0 - - 3 0 OF . assuming a 100 m by 100 m thin plate. 0 0 1 5 0 0 5 CODE WORK - 4 30 1 0 3 THE MANROSS 69 120 6 1 0 69 Yellow Girl 5 182 1 00 Dryberry 73000.0 Bay 32B 89000.0 WOODS Lake 17000.0 DEVONSHIRE 97000.0 0 0 . 1 0 107 13 5 19 0 Keating Correlation Coefficients 5 18 2 9 0 0 104000.0 0 0 23000.0 MacQUARRIE Atikwa 0 0 0 Lake 0 89000.0 0 0 M82634 148 1 - 4 Sioux 0 190 0 1 . 0 5 3 WILLI 5 0 EM System Upper NGDON TOWNSHIP 7 Possible kimberlite targets have been identified from the Narrows - 22' 2 - 5 1 100000.0 0 100000.0 0 1 Manitou 2 3 - 5- McGEORGE 1 0 WILLINGDON 0 Whitefish 40000.0 1 Lake 0 0 residual magnetic intensity data, based on the identification of 5 0 0 0 0 1 27 3 38 0 Bay 2 24 . - 4 35 61000.0 63000.0 5 0 77000.0 M82636 59000.0 5 62000.0 60000.0 64000.0 0 24000.0 0 3 63000.0 5 0 65000.0 66000.0 Lake of the 0 0 5 - 0 Rowan 0 1 0 T4100> 0 0 roughly circular anomalies. This procedure was automated by Woods 34 TWEEDSMUIR M82635 TWEEDSMUI 1 Lake R TOWNSHIP 0 . T4100> Obabikong Lower - 1 0 - 1 0 1 Naongashing 0 5 5 L2181> Manitou 23 2 182 2 45 23 92 16 0 1 35B Lawrence 0 using a known pattern-recognition technique (Keating 1995), 31A & 35A Lake 5 PHILLIPS Kakagi Lake 9 37 0 96 0 which consists of computing, over a moving window, a first-order Lake M82638 0 Sabaskong Bay 1 M82637 5 23 < 80000.0 - 5 22' Lake of the 77000.0 1 0 1 0 62 17 5 2 5 L regression between a vertical cylinder model anomaly and the - 1 2 Woods 35J 0 5 2 Saug-A- 0 0 3 - Crow 3 1 Gaw-Sing 1 M82640 0 - 1 5 0 0 gridded magnetic data. Only the results where the absolute value GODSON 91 3 40000.0 6 Lake 7 45m 3 32 0 0 Pipestone 6 0 8 Big 0 3 32 1 Big Island M82641 64000.0 22000.0 5 0 Nestor Lake 0 Island 0 . 74000.0 of the correlation coefficient is above a threshold of 75% were Mainland 93 0 0 0 3 0 0 31E Falls M82639 5 2 0 80000.0 - 0 7 0 82000.0 130 10 5 0 2 0 MATHIEU 0 . 0 5 2 0 - 3 1 4 24 0 retained. The results are depicted as circular symbols, scaled to L3121> 44 8 2 0 0 . 0 Big Grassy 8 5 0 0 7 36000.0 52000.0 CLAXTON McLARTY 1 0 0 MORSON 5 0 0 CROOME 0 River 35G 0 5 M82642 . 5 reflect the correlation value. The most favourable targets are 0 0 Mean EM Bird Height 0 Wapus Lake 108000.0 2 184 2 0 0 49° 62000.0 - 0 1 Ground . - Assabaska 0 0 DEWART ROWE Otukamamoan 0 those that exhibit a cluster of high amplitude solutions. 5 33 1 0 MENARY SENN 0 - 2 0 - McCrosson TOVELL Lake 0 1 55000.0 5 - 2 5 0 0 5 1 Jackjish 5 0 0 0 0 48000.0 0 52000.0 - 0 0 45000.0 Correlation coefficients with a negative value correspond to 1 0 0 3 SPOHN Lake 1 0 5 - 57 15 8 5 68 68 - PRATT 35000.0 0 - SUTHERLAND SIFTON - 1 3 RICHARDSON 71000.0 reversely magnetized sources. It is important to be aware that POTTS Rainy 2 5 0 5 7 - Lake 107000.0 FLEMING 63000.0 0 71 6 8 0 0 24000.0 0 other magnetic sources may correlate well with the vertical Rainy Lake 0 5 0 . 0 0 10 27 0 BLUE NELLES PATTULLO 0 TAIT KINGFORD 0 - MATHER 5 0 DANCE 2 cylinder model, whereas some kimberlite pipes of irregular GRIESINGER . 1 . 58000.0 0 0 5 64000.0 (Not to scale) 0 0 37000.0 134 6 - 0 - 0 geometry may not. 5 69000.0 107000.0 5 Location map 1 cm equals 15 km 41000.0 0 0 0 0 L2161> 54000.0 - 0 3 0 3 0 0 5 5 5 5 0 27000.0 0 - 2 - 0 0 0 - 1 2 0 0 0 1 3 1 0 3 6 - Cylinder model parameters: - 0 2 29 59000.0 < 5 4 1 5 - . 0 - 0 0 0 0 - 0 L 0 1 0 0 0 2 0 0 0 1 5 0 25000.0 Cylinder diameter: 200 m 5 38 2 - 0 1 69000.0 5 1 1 2 0 1 - - 1 1 0 1 0 9 1 0 23 2 0 0 0 5 19 0 . 0 0 1 7 0 0 2 5 0 - 0 0 6 9 2 0 Cylinder length: Infinite 0 0 5 0 19000.0 5 5 0 LEGEND 5 3 0 3 3 1 0 0 4 60 19 - 0 0 47000.0 0 7 - 0 3 5 0 110000.0 7 32 0 0 1 1 0 5 0 5 124000.0 0 2 0 0 35000.0 . 0 0 0 147 1 0 Overburden thickness: 8.1 m 0 0 . 1 - - 0 5 - 0 0 0 0 0 8 26 0 10 27 44000.0 0 0 87000.0 1 . . 69000.0 1 0 5 31 0 - Atom Lake 2 . . Magnetic inclination: 74.0 degrees N 81 4 0 5 SOURCES OF INFORMATION 0 0 - 9 - 5 85000.0 0 8 25 2 4 39 0 81 3 102000.0 0 Magnetic declination: 0.28 degrees E - 0 21000.0 3 68000.0 0 31 3 r 0 0 0 - 3 e 21000.0 17000.0 ELECTROMAGNETIC ANOMALY SYMBOLS 0 5 0 2 v 3 21 17000.0 5 0 Window size: 13 x 13 cells (520 m by 520 m) . 0 i 0 0 6 26 4 33 365 3829 2 34 1 26 1 0 5 27 - 0 57000.0 55000.0 53000.0 - 50000.0 56000.0 0 54000.0 52000.0 51000.0 1 - 2 0 - 5 R 0 - Base map information derived from the Land Information Ontario 86000.0 88000.0 2 - s 5 153 2 0 0 1 0 0 6 34 0 71 13 - u 83000.0 117 19 2 104 3 0 60 3 97 5 100 25 5 2 101000.0 0 Data Warehouse, Land Information Ontario, Ontario Ministry of 97000.0 p 5 0 - 1 0 0 67000.0 0 1 5 5 a - 1 1 0 46000.0 - 0 7 Anomaly Conductance Classification 100 11 0 - 0 0 - Natural Resources and Forestry, scale 1:50 000. 0 3 0 111000.0 W 0 0 55000.0 5 5 67 91000.0 0 0 5 0 67 0 0 - 5 93000.0 4 28 2 34000.0 0 3 2 1 5 - 0 0 0 79000.0 5 0 21' 2 1 30 1 . 0 - 1 > 50 siemens 197 8 106000.0 - Magnetic declination for the centre of the map area was 0 L2141> - 2 0 0 0 0 124000.0 5 1 9 34 6 33 - 0 1 4 0 SURVEY PARAMETERS 36000.0 0 5 107 9 0 approximately 0.1°W in 2014. 0 0 2 114000.0 0 - 0 0 5 0 41000.0 0 35 - 50 siemens 1 0 112 15 5 0 . 97 10 0 1 - 0 5 0 - 0 0 - - 1 . - 88000.0 - 2 0 2 33 1 1 - 3 0 Meju, Maxwell, A. 1998. Short Note: A simple method of 0 3 0 0 Corbett Lake 20 - 35 siemens 44000.0 0 0 0 86000.0 0 AIRCRAFT L < transient electromagnetic data analysis, Geophysics, v.63, no.2, 121000.0 95 11 88000.0 21' 3 L 0 1 0 2 97000.0 Type: AS350B3 3 0 p.405-410. - 5 2 - 5 0 - 1 1 10 - 20 siemens 0 3 1 5 Registration: C-FKOI > 0 9 1 0 - - 3 5 7 1 - 0 0 0 0 0 5 0 1 0 4 47000.0 0 0 2 0 0 96000.0 0 5 0 Keating, P.B. 1995. A simple technique to identify magnetic 0 5 - 10 siemens 0 5 0 2 0 0 - - 00 . 72000.0 8 24 16000.0 . 0 0 0 0 22000.0 . MAGNETOMETER Annie Island 0 anomalies due to kimberlite pipes; Exploration and Mining 5 - 0 2 0 1 5 0 2 0 0 0 0 5 18 - 3 123 7 6 < 5 siemens Type: Geometrics® G823A cesium vapour - 0 0 Geology, v.4, no.2, p.121-125. 1 76000.0 4 - 2 - 90000.0 5 0 - 3 2 0 2 Sensitivity: 0.02 nT 0 5 1 1 103000.0 - 1 30 76000.0 162 1 0 4 35 0 5 5 0 29000.0 62000.0 0 . 1 cultural response 0 0 1 33 0 0 5 19 0 Noise level: ±0.004 nT - 8 5 .0 0 0 0 108 9 5 0 2 0 0 107 22 3 1 5 0 Sample interval: 10 readings per second 0 0 8 0 64 11 196 0 1 0 . 21000.0 0 0 0 1 2 0 4 0 0 3 4 24 9 Sensor location: 33 m below aircraft 4 - L2121> 9 32 - 0 1 6 2 0 0 39000.0 66 1 66 0 0 . 101000.0 - 0 0 0 0 0 0 - 2 - 0 - 0 0 0 4 0 78000.0 3 5 0 0 79000.0 5 139 4 . . 5 146 16 0 0 0 0 83000.0 . 0 0 ELECTROMAGNETIC SYSTEM - CREDITS 5 2 1 - 4 3 37000.0 107000.0 63000.0 7 35 0 - - 51000.0 0 0 8 Type: VTEM®Plus 41000.0 4 99000.0 0 5 < 2 0 81000.0 FLIGHT LINE INFORMATION - L 78 12 0 Base frequency: 30 Hz 0 1 2 1 0 9 42 . 1 26 2 22 3 32 1 0 4 28 0 72000.0 42000.0 43000.0 44000.0 45000.0 47000.0 - 2 5 0 48000.0 Current waveform: trapezoid 0 46000.0 41000.0 1 0 0 T4120> Data acquisition, data compilation and map production by T4120> 0 1 0 6 0 3 Peak dipole moment (NIA): 522 430 Am² 127 4 50 1 86 9 103120 4515 7 Geotech Limited, Aurora, Ontario. 0 5 0 0 0 23000.0 0 106000.0 Pulse width: 4.4 msec 2 0 0 3 - 4 34 2 0 0 . 9 3 - 0 Line 0 0 5 0 2 0 5 38000.0 0 0 5 0 0 - 108000.0 0 Off-time: 7036 µsec 0 2 1 Project management and quality assurance by Paterson, Grant 0 12701> 0 5 3 5 3 54000.0 1 0 1 5 3 0 0 0 5 0 2 number 6 - - 56 12 0 . 3 0 0 3 Pulse repetition: 30 cycles per second, 0 63000.0 0 5 and Watson Limited, Toronto, Ontario. 26000.0 0 0 0 0 - 42000.0 2 0 5 2 - 0 60 pulses per second . 0 - 0 1 - 0 0 5 0 2 2 0 0 0 - 73000.0 2 7 37 - 0 - 3 5 26000.0 62000.0 0 0 5 5 7 Parameters: Z-component of dB/dt 3 41 5 - 1 6 35 0 Contract management, base maps and map surrounds by the 109000.0 Flint Lake 0 1 0 6 0 4 0 0 53000.0 0 Noise levels: 0.0005 pV/(A*m ) 56 19 0 - Ontario Ministry of Northern Development and Mines, Sudbury, 76150 7 123 18 0 . - 6 0 3 5 102 12 - 7 43000.0 10 31 36000.0 5 L 1 0 Sample interval: 10 readings per second 2 - 0 0 1 3 Ontario. 0 0 3 2 0 1 2 0 0 1 0 5 30 47000.0 86000.0 65000.0 - 1 5 - 0 0 - 0 20' 0 4 32 5 4 0 Bird Location: 47 m below aircraft 16000.0 0 . 0 0 0 3 0 105 9 0 5 0 . 5 53000.0 5 22 0 0 1 0 0 7 2 0 0 0 > 0 - 118 8 0 Anomaly number 0 65 Every possible effort has been made to ensure the accuracy of 65 5 . 0 - 2 1 < 0 5 0 59000.0 82 12 0 - 0 70000.0 192 1 Number of channels - 2 5 0 L . NAVIGATION SYSTEM 0 0 the information presented; however, the Ontario Ministry of 2 46000.0 0 6 8 22 3 0 84000.0 deflected 68000.0 0 0 7 10 5 23000.0 2 5 89000.0 GPS receiver: MID-TECH® RX400p - 9 - 60000.0 Northern Development and Mines does not assume liability for 85000.0 0 18000.0 3 8 1 17 0 1 0 1 0 2 0 0 0 GPS sample interval: 5 readings per second 7 17 1 171 1 0 6 31 20000.0 0 0 26 12 any errors that may occur. Users should verify critical information. . - 8 0 0 1 0 210 1 1 0 - 20' 36000.0 5 Radar altimeter: Terra TRA3000/TRI-40 5 0 Apparent depth 16000.0 20000.0 0 0 0 101 1 101000.0 54000.0 68000.0 1 58 9 7 78000.0 Apparent conductance . 0 0 125000.0 - 0 Radar sample interval: 5 readings per second 5 28 er 1 (m) Corresponding digital data for this survey are available from the 2 iv - 20 5 0 69000.0 R 0 (s) - e Video flight path recorder: Archos™ 605 Wi-Fi e 0 following Ontario Geological Survey publication: 0 r 3 107000.0 70000.0 0 0 t . 0 2 9 r 4 0 136 6 a 5 1 0 9 6 9 d 4 - e 0 0 3 0 0 0 0 C 2 0 0 47000.0 0 - 0 0 0 3 3 0 0 2 3 34 102000.0 - 3 0 0 0 - 0 0 0 0 0 BASE STATION 2 35 0 . Fiducial Ontario Geological Survey 2014. Ontario airborne geophysical 5 0 0 0 . 5 2 3 . 3 18 5 0 . 5 0 0 0 5 2 0 76120 . 5 4 - 0 3 0 6 32 0 1 Magnetometer: Geotech Base Station - Geometrics® 0 1 0 98 19 - L2081> surveys, magnetic and electromagnetic data, grid and profile 58 18 - 0 2 24 5 - 84000.0 5 168 1 0 1 25 0 1 0 40000.0 - G822B cesium-vapour sensor 0 . 2 112000.0 - data (ASCII and Geosoft® formats) and vector data, Nestor Falls 0 0 0 5 1 63 10 0 3 21 - 0 1 3 87000.0 5 5 25 1 0 0 1 0 43000.0 5 151 3 0 - 0 0 98000.0 3 1 Magnetometer sample interval: 10 readings per second 75000.0 112 6 - 1 0 0 area; Ontario Geological Survey, Geophysical Data Set 1076. 1 0 8 115000.0 0 5 1 0 0 5 133 2 4 27 3 32 94000.0 1 25 106 6 2 35 0 0 34000.0 0 39000.0 38000.0 5 30 37000.0 35000.0 36000.0 0 35000.0 33000.0 32000.0 31000.0 6 . 1 0 0 0 - 0 3 3 0 2 0 0 0 1 3 96000.0 0 Issued 2014. 92000.0 0 125000.0 110 6 60 10 0 38 2 90 13 - 3 0 3 0 0 0 60 8 4 36 0 - 1 5 0 0 3 21 0 5 0 0 0 - - 5 - 1 1 2 87000.0 7 32 2 0 - Survey date: January 26 to March 1, 2014 . 0 0 0 0 3 - 0 4 - 0 0 21000.0 . 9 - 0 0 1 48000.0 8 24 5 0 1 26 0 64 47 16 0 64 Nominal aircraft terrain clearance: 92 m 37000.0 138 3 0 . Information from this publication may be quoted if credit is given. 5 0 0 4 33 59 11 0 0 3 - Bag Lake 0 - 2 . 3 2 Traverse line spacing: 200 m 5 0 87000.0 5 0 It is recommended that reference be made in the following form: 71000.0 96 3 156 4 9 0 1 5 MAGNETIC CONTOURS 0 0 0 3 27 2 8 96 14 0 0 4 25 - 0 5 0 Control line spacing: 1500 m 5 00 < 0 0 3 0 3 0 0 0 5 0 0 - L 0 - 5 0 . 4 . 95000.0 5 0 2 5 0 0 0 2 3 0 0 - 2 Traverse line direction: north-south 5 0 47 3 . Ontario Geological Survey 2014. Airborne magnetic and 139 5 8 31 0 0 2 0 0 5 20000.0 42000.0 4 - - 2 0 0 7 - 1 1 0 0 0 Control line direction: east-west 5 0 5 20 0 1 electromagnetic surveys, residual magnetic field contours 1 3 5 1 27 0 5 - 0 5 97 11 2 0 6 2 5 nanoteslas (nT) 122000.0 0 15000.0 - 0 8 - 0 91000.0 0 1 with electromagnetic anomalies and Keating coefficients, 5 40 0 5 0 5 0 163 1 2 0 Timber Island 0 3 20 0 42 3 38000.0 . CO-ORDINATE SYSTEM 0 1 25 64000.0 4 . - 0 5 20 0 Nestor Falls area; Ontario Geological Survey, Map 82 635, 4 0 0 0 106000.0 - 0 77000.0 5 102000.0 18 0 3 0 5 4 21 62 37 - . 2 84000.0 - 3 36 0 6 26 4 33 0 7 Projection: Universal Transverse Mercator 0 3 5 0 1 6 35 153 1 scale 1:20 000. 2 3 35 61000.0 122 6 0 1 0 0 50000.0 - 0 0 139 1 5 0 0 0 Derry - 6 26 5 0 3 216 1 225 1 Datum: NAD83 0 3 0 2 121 26 10 nT contour 1000 nT contour 1 - L2061> 102 8 59 13 0 0 0 3 5 5 Lake 96 17 97 25 1 0 5 0 0 5 38000.0 7 Central meridian: 93°00′W (UTM zone 15) 5 5 5 0 3 39 7 73000.0 0 5 0 2 30000.0 0 0 0 122 7 0 78000.0 0 0 0 5 5 0 - 0 0 5 0 2 Central scale factor: 0.9996 0 0 2 0 5 . 75 34 . 7 0 8 23 0 4 L 0 Magnetic 2 5 False easting: 500 000 m 2 50 nT contour 0 0 0 - 6 2 6 33 19' - 0 82000.0 0 1 0 4 45 0 5 2 2 5 25 0 0 . False northing: 0 m 152 3 0 0 0 - 5 depression 2 - 105000.0 5 - 0 . 3 0 3 30 1 0 > 1 0 0 4 - 0 71 0 - 75 16 9 5 - 0 5 2 42 1 90 77 2 33 0 0 43000.0 5 0 0 39000.0 131 7 0 0 0 - 0 - 0 < 0 102000.0 4 4 23 4 28 4 108000.0 5 29 0 5 1 79000.0 0 75 13 5 2 0 L 0 0 0 250 nT contour - 0 62000.0 1 25 39 39 5 2 5 31 . 0 149 12 0 63 63 0 1 0 109000.0 5 6 25 4 20 - 29 2 90 13 0 1 5 31 27000.0 233 2 5 2 25 - 0 3 32 - 2 27 1 5 5 1 109 3 15000.0 5 121 6 0 2 5 - 3 0 3 25000.0 3 25 19' 42000.0 0 36 0 1 7 44 2 2 149 1 0 5 0 0 - 1 89 6 2 27 5 0 43 2 - 7 32 98000.0 0 0 - 2 0 - 3 0 37 4 6 - 5 0 109 0 13 - 0 2 0 4 6 2 28 0 4 0 45 0 1 0 112 3 53 19 . 26000.0 0 5 0 - 82 4 1 26 0 67 12 0 0 5 3 31 . 6 4 3 0 - 0 0 0 0 - 5 85000.0 1 5 0 53000.0 - 1 0 2 0 2 29 0 5 2 0 5 0 0 2 26 0 0 2 3 . 0 82 4 0 7 26 0 0 - 0 3 34 - 2 30 3 31 5 28 5 1 6 3745 71 7 29 9 25 2 4 23 8 30 10 26 1 25 0 17000.0 0 20000.0 0 21000.0 11223000.03 18000.0 0 16000.0 19000.0 0 22000.0 40 5 24000.0 0 0 5 0 27 26 7 42 5 T4140> - 69000.0 T4140> 84000.0 2 111 10 . . 61000.0 142 8 0 0 2 32 0 1 125 6 100 16 2 122 9 103 11 1090 9 37 62 64 6 121 3 37 2 193 3 1 35 5 161 4 0 7 36 5 1 KEATING COEFFICIENTS - 90000.0 0 0 2 0 125 3 27 37 2 0 - L 3 3 1 L 0 64 12 5 7 1 25 2 5 0 0 5 - 2 - 2 0 5 31 6 0 48 12 1 0 0 6 0 0 3 0 2 28 4 - 0 1 23 0 6 26 6 21 . 5 3 5 1 4 0 5 36 0 232 3 6 32 0 2 5 3 - 22000.0 45000.0 4 87 8 1 . 7 > 0 0 0 0 > 0 - 4 3 37000.0 - 2 - 100 6 3 29 Positive correlation Negative correlation 72000.0 7 4 0 - 138 5 5 0 0 71000.0 0 105 5 0 1 - 0 0 167 2 3 5 0 3 31 109 20 0 72 11 1 53000.0 0 0 8 5 5 0 3 27 54000.0 8 19 0 15000.0 0 0 0 5 0 . 77000.0 0 19000.0 0 0 2 5 2 34 0 93 7 0 2 30 1 . 0 0 1 0 2 0 - 5 2 0 - 0 0 0 0 - 3 5 64 11 0 0 1 1 7 0 0 3 0 5 90% - - . 52000.0 0 3 9 0 161 1 0 5 151 4 - 4 29 41000.0 3 74000.0 7 34 0 3 0 0 Cedartree Lake 3 < - 83 16 2 42 7 0 1 0 5 29 0 2 L 0 83000.0 5 2 0 0 0 5 1 0 0 2 108000.0 3 . 0 0 0 0 0 5 2 6 19 - 3 96 7 5 0 64 13 100000.0 . 26 60000.0 3 5 0 1 26 2 - 86000.0 17000.0 0 0 0 0 - 3 0 6 1 3 6 73 5 0 46000.0 0 37000.0 0 - 5 5 5 6 32 5 2 1 85% 6 2 28 - 3 19000.0 6 31 1 0 3 0 32 0 2 0 163 1 28 - 6 34 2 1 1 0 0 103 5 0 120 3 2 3 - 0 39000.0 2 0 5462000 m 5462000 m 0 0 - 70000.0 0 4 0 0 0 - 68 11 0 . . 141 4 0 0 1 0 95 13 - 4 0 - 0 0 55 12 2 - 66000.0 1 - 61000.0 5 8 20 0 0 92 5 4 0 61 13 0 3 5 0 1 48000.0 3 2 27 . 5 0 - 0 0 0 0 0 0 0 2 103000.0 1 0 0 0 9 24 0 0 0 0 80% 2 0 . 0 0 5 - 0 4 0 0 7 - 1 0 3 0 5 1 0 . 5 2 0 5 0 3 0 1 2 34 0 0 22000.0 - 158 1 5 5 - 0 126000.0 2 0 0 0 0 107 4 2 - 0 - 0 0 0 0 0 - 0 4 5 0 133 5 5 1 0 L2621> - 0 0 2 2 0 0 . 0 0 . 0 71000.0 5 T 0 0 1 0 0 0 5 1 0 0 0 91 16 5 . 1 26 0 67000.0 0 5 1 0 Jessie Lake 0 1 . 0 2 26 95000.0 0 7 30 - 5 T 1 0 0 5 4 0 0 0 - 4 75% 0 < 0 0 Stephen Lake L 0 - . > 0 3 2 0 0 113000.0 2 37 5 102 34 9 1 120 4 - 2 5 0 0 0 90 12 1 2 - 0 1 36 5 2 0 0 0 2 1 41 1 22 116000.0 0 0 0 3 - - 0 5 3 0 0 0 1 0 5 - 49000.0 1 7 2 20000.0 3 0 0 > 0 3 0 0 0 56 20 - 0 5 41 3 26 5 1 2 36 . 5 L2441> 0 L2481> L2461> 0 59 17 L2421> 99000.0 5 5 0 0 41 0 2 46 30 166 2 4 2 0 0 0 2 < 0 27 4037 5 0 2 28 8 0 0 1 0 1 28 0 0 3 45 2 34 L 6 . 9 0 0 1 . 0 46 31 108 4 2 3 3 43 0 0 0 44 16 3 0 1 28 33 27 2 9 28 126000.0 0 - 5 - 1 26 66 33 3 - 0 0 4 0 0 0 0 1 6 36 2 78 27 9 2 - 60 29 0 1 5 0 70 7 1 5 33 0 - 0 1 110 18 0 - 3 0 - 0 27 59 39 14 . 18' 1 36000.0 0 70000.0 1 0 6 5 0 0 0 0 5 27 0 86000.0 64 38 2 0 174 2 119 . 5 5 0 5 1 26 0 0 1 0 118 6 0 0 . 0 0 6 1 23 1 0 0 - 3 0 65000.0 0 0 9 0 3 28 90 17 . 0 0 0 0 39000.0 27 0 103 13 0 3 1 0 5 24 1 7 2 8 118 0 3 . 0 5 23 7 2 40 6 22 5 31 0 8 - 0 7 32 112 4 2 32 0 0 . 0 0 189 4 0 0 . 5 - 5 0 0 2 0 1 27 37 1 0 0 0 0 162 2 4 42 3 31 42000.0 0 6 27 0 2 34 1 28 5 0 102 3 93000.0 5 25 0 2 2 26 38000.0 16000.0 15000.0 14000.0 13000.0 12000.0 11000.0 . 39 2 89000.0 88000.0 87000.0 86000. 17000.0 85000.0 10000.0 0 0 1 0 2 5 . 0 . 0 - 97 2 1 26 64 27 149 5 71 6 0 Users of OGS products are encouraged to contact those - 0 108 15 3 70 9 4 0 5 4 115 3 5 - 7 31 0 1 4900 57 - 9 8800 95 34 78 5 109 6 58 4 62 14 82 3 1 0 65 14 141 2 940 91 4 3 2 25 1 29 1 0 110 4 Aboriginal communities whose traditional territories may be - 5 0 0 74 106 4 5 > - 49°18'00" 5 5 0 0 5 3 7 2 5 78 8 2 1 31 3 40 4 located in the mineral exploration area to discuss their project. 49°17'48" 146 5 L2661> 96 12 L2181> L3040> L2641> L2341> L3220> L3160> L2921> < L3121> L3060> 422000 m 24 30 31L 32 33 38 39 5 40 41 46 L 37 34 35 36 L 2 L L L 2 26 27 28 29 L 42 43 44 45 447000 m L 2 L L L 23 25 0 L L L 1 L 5 L L 2 0 2 1 8 2 2 2 2 0 2 2 6 2 2 2 2 2 2 0 2 2 94°00'00" 0 2 8 1 4 3 2 2 1 1 0 8 2 1 1 0 94°05'11" 05' 04' 03' 02' 01' 59' 58' 57' 56' 55' 54' 53' 52' 51' 50' > 49' 48' 2 47' 46' 1 0 45' 0 44' 0 43' 93°42'55" 5 1 L L2081> L2201> L2261> L2141> 0 0 L 2 9 1 5 7 1 9 7 7 1 2 5 1 5 3 3 9 1 3 T 0 2 1 > 3 0 1 > 1 1 > 1 1 1 1 > 1 1 1 1 1 1 1 < 1 1 5 > L 2 1 > 0 2 1 1 1 6 0 > > 6 2 >