AIRBORNE GEOPHYSICAL DATA DVD-ROM Survey name: Expo Block and Ellen Creek Block Location: Finlayson Lake, Yukon Job No.: GL140269 Client: 18526 Yukon Inc Survey date: August 21st to August 29th, 2014 Survey company name: Geotech Ltd. Total line-km: 579 Archive creation date: September, 2014 Aircraft type: Astar 350 B3 helicopter registration C-GEOJ Base of operation: Finlayson Lake, Yukon Mean terrain clearance: 106 m Airborne Magnetometer Model: Geometrics Type: Caesium-vapour Sample Interval: 0.1 seconds Sensitivity: 0.02 nT Mount: Towed bird, 13 metres below helicopter Actual average magnetic sensor clearance : 93 metres Airborne EM Model: Geotech Time Domain EM system Type: versatile time domain electromagnetic (VTEM) system Number of channels: 35 (0.096 - 10.667ms) Sample Interval: 0.1 seconds Mount: Towed ring, 35 metres below helicopter Transmitter Transmitter Loop diameter: 17.6 m Effective Transmitter coil area: 973m2 Transmitter Number of turns: 4 Transmitter base frequency: 30 Hz Peak Current: 250 Amp Peak Dipole moment: 243,285 nIA Pulse width: 3.39 ms Actual average EM bird terrain clearance: 70 metres Receiver Z-Coil coil diameter: 1.2 m Number of turns: 100 Effective coil area: 113.04 m2 Navigation type: NovAtel’s WAAS(Wide Area Augmentation System) enable GPS receiver (on the tail of the helicopter) Radar altimeter: Terra TRA3000/TRI-40 Survey block Traverse Line spacing (m) Area (Km2) Planned Line-km Actual Line-km Flight direction Line numbers Expo Traverse: 100 49 485 493 N 90° E / N 270° E L1000 – L1680 Tie: 1000 52 54 N 0° E / N 180° E T2000 – T2090 Ellen Creek Traverse: 100 4 33 34 N 90° E / N 270° E L3000 – L3100 Tie: 1000 9 9 N 0° E / N 180° E T4000 – T4020 TOTAL 53 579 590 AIRBORNE GEOPHYSICAL DIGITAL ARCHIVES • Two copies of the data and maps on DVD were prepared to accompany the report. Each DVD contains a digital file of the line data in GDB Geosoft Montaj format as well as the maps in Geosoft Montaj Map and PDF format. • DVD structure. There are two (2) main directories; Data contains databases, grids and maps, as described below. Report contains a copy of the report and appendices in PDF format. Databases in Geosoft GDB format; Channel name Units Description X: metres UTM Easting NAD83 Zone 9 North Y: metres UTM Northing NAD83 Zone 9 North Longitude: Decimal Degrees WGS 84 Longitude data Latitude: Decimal Degrees WGS 84 Latitude data Z: metres GPS antenna elevation (above Geoid) Zb: metres Transmitter-receiver loop elevation (above Geiod) Radar: metres helicopter terrain clearance from radar altimeter Radarb: metres Calculated EM bird terrain clearance from radar altimeter DEM: metres Digital Elevation Model Gtime: Seconds of the day GPS time Mag1: nT Raw Total Magnetic field data Basemag: nT Magnetic diurnal variation data Mag2: nT Diurnal corrected Total Magnetic field data Mag3: nT Levelled Total Magnetic field data CVG nT/m Calculated Magnetic Vertical Gradient SFz[14]: pV/(A*m4) Z dB/dt 0.096 millisecond time channel SFz[15]: pV/(A*m4) Z dB/dt 0.110 millisecond time channel SFz[16]: pV/(A*m4) Z dB/dt 0.126 millisecond time channel SFz[17]: pV/(A*m4) Z dB/dt 0.145 millisecond time channel SFz[18]: pV/(A*m4) Z dB/dt 0.167 millisecond time channel SFz[19]: pV/(A*m4) Z dB/dt 0.192 millisecond time channel SFz[20]: pV/(A*m4) Z dB/dt 0.220 millisecond time channel SFz[21]: pV/(A*m4) Z dB/dt 0.253 millisecond time channel SFz[22]: pV/(A*m4) Z dB/dt 0.290 millisecond time channel SFz[23]: pV/(A*m4) Z dB/dt 0.333 millisecond time channel SFz[24]: pV/(A*m4) Z dB/dt 0.383 millisecond time channel SFz[25]: pV/(A*m4) Z dB/dt 0.440 millisecond time channel SFz[26]: pV/(A*m4) Z dB/dt 0.505 millisecond time channel SFz[27]: pV/(A*m4) Z dB/dt 0.580 millisecond time channel SFz[28]: pV/(A*m4) Z dB/dt 0.667 millisecond time channel SFz[29]: pV/(A*m4) Z dB/dt 0.766 millisecond time channel SFz[30]: pV/(A*m4) Z dB/dt 0.880 millisecond time channel SFz[31]: pV/(A*m4) Z dB/dt 1.010 millisecond time channel SFz[32]: pV/(A*m4) Z dB/dt 1.161 millisecond time channel SFz[33]: pV/(A*m4) Z dB/dt 1.333 millisecond time channel SFz[34]: pV/(A*m4) Z dB/dt 1.531 millisecond time channel SFz[35]: pV/(A*m4) Z dB/dt 1.760 millisecond time channel SFz[36]: pV/(A*m4) Z dB/dt 2.021 millisecond time channel SFz[37]: pV/(A*m4) Z dB/dt 2.323 millisecond time channel SFz[38]: pV/(A*m4) Z dB/dt 2.667 millisecond time channel SFz[39]: pV/(A*m4) Z dB/dt 3.063 millisecond time channel SFz[40]: pV/(A*m4) Z dB/dt 3.521 millisecond time channel SFz[41]: pV/(A*m4) Z dB/dt 4.042 millisecond time channel SFz[42]: pV/(A*m4) Z dB/dt 4.641 millisecond time channel SFz[43]: pV/(A*m4) Z dB/dt 5.333 millisecond time channel SFz[44]: pV/(A*m4) Z dB/dt 6.125 millisecond time channel SFz[45]: pV/(A*m4) Z dB/dt 7.036 millisecond time channel SFz[46]: pV/(A*m4) Z dB/dt 8.083 millisecond time channel SFz[47]: pV/(A*m4) Z dB/dt 9.286 millisecond time channel SFz[48]: pV/(A*m4) Z dB/dt 10.667 millisecond time channel BFz (pV*ms)/(A*m4) Z B-Field data for time channels 14 to 48 PLM: 60 Hz power line monitor TauSF milliseconds Time Constant (Tau) calculated from dB/dt data Nchan_SF Last channel where the Tau algorithm stops calculation, dB/dt data TauBF milliseconds Time Constant (Tau) calculated from B-Field data Nchan_BF Last channel where the Tau algorithm stops calculation, B-Field data Off-Time Decay Sampling Scheme VTEM Decay Sampling Scheme Index Start End Middle Width Milliseconds 14 0.090 0.103 0.096 0.013 15 0.103 0.118 0.110 0.015 16 0.118 0.136 0.126 0.018 17 0.136 0.156 0.145 0.020 18 0.156 0.179 0.167 0.023 19 0.179 0.206 0.192 0.027 20 0.206 0.236 0.220 0.030 21 0.236 0.271 0.253 0.035 22 0.271 0.312 0.290 0.040 23 0.312 0.358 0.333 0.046 24 0.358 0.411 0.383 0.053 25 0.411 0.472 0.440 0.061 26 0.472 0.543 0.505 0.070 27 0.543 0.623 0.580 0.081 28 0.623 0.716 0.667 0.093 29 0.716 0.823 0.766 0.107 30 0.823 0.945 0.880 0.122 31 0.945 1.086 1.010 0.141 32 1.086 1.247 1.161 0.161 33 1.247 1.432 1.333 0.185 34 1.432 1.646 1.531 0.214 35 1.646 1.891 1.760 0.245 36 1.891 2.172 2.021 0.281 37 2.172 2.495 2.323 0.323 38 2.495 2.865 2.667 0.370 39 2.865 3.292 3.063 0.427 40 3.292 3.781 3.521 0.490 41 3.781 4.341 4.042 0.560 42 4.341 4.987 4.641 0.646 43 4.987 5.729 5.333 0.742 44 5.729 6.581 6.125 0.852 45 6.581 7.560 7.036 0.979 46 7.560 8.685 8.083 1.125 47 8.685 9.977 9.286 1.292 48 9.977 11.458 10.667 1.482 • Database of the Resistivity Depth Images in Geosoft GDB format, containing the following channels: Channel name Units Description Xg: metres UTM Easting NAD83 Zone 9 North Yg: metres UTM Northing NAD83 Zone 9 North Dist: meters Distance from the beginning of the line Depth: meters array channel, depth from the surface Z: meters array channel, depth from sea level AppRes: Ohm-m array channel, Apparent Resistivity TR: meters EM system height from sea level Topo: meters digital elevation model Radarb: metres Calculated EM bird terrain clearance from radar altimeter SF: pV/(A*m^4) array channel, dB/dT Mag: nT Total Magnetic field data CVG: nT/m CVG data DOI: metres Depth of Investigation: a measure of VTEM depth effectiveness • Database of the VTEM Waveform “GL140269_Waveform_Final.gdb” in Geosoft GDB format, containing the following channels: Time: Sampling rate interval, 5.2083 microseconds Tx_Current: Output current of the transmitter (amps) Rx_Voltage: Output voltage of the receiver coil (volts) • Grids in Geosoft GRD and GeoTIFF format, as follows: BFz26: B-Field Z Component Channel 26 (Time Gate 0.505 ms) BFz36: B-Field Z Component Channel 36 (Time Gate 2.021 ms) CVG: Calculated Vertical Derivative of TMI (CVG) DEM: Digital Elevation Model Mag3: Total Magnetic Intensity (TMI) PLM: Power line Monitor SFz15: dB/dt Z Component Channel 15 (Time Gate 0.110 ms) SFz30: dB/dt Z Component Channel 30 (Time Gate 0.880 ms) SFz40: dB/dt Z Component Channel 40 (Time Gate 3.521 ms) TauSF: dB/dt Calculated Time Constant (TAU) TauBF: B-Field Calculated Time Constant (TAU) A Geosoft .GRD file has a .GI metadata file associated with it, containing grid projection information. A grid cell size of 25 metres was used. • Maps at 1:10,000 scale in Geosoft MAP format, as follows: GL140269_10K_dBdt_bb: dB/dt profiles Z Component, Time Gates 0.220 – 7.036 ms in linear – logarithmic scale. GL140269_10K_Bfield_bb: B-field profiles Z Component, Time Gates 0.220 – 7.036 ms in linear – logarithmic scale. GL140269_10K_BFz36_bb: B-Field late time Z Component Channel 36, Time Gate 2.021 ms colour image. GL140269_10K_BFz26_bb: B-Field late time Z Component Channel 26, Time Gate 0.505 ms colour image. GL140269_10K_TMI_bb: Total Magnetic Intensity (TMI) colour image and contours. GL140269_10K_TauSF_bb: dB/dt Calculated Time Constant (TAU) with Calculated Vertical Derivative contours. Where bb represents the block name ie GL140269_10k_TMI_Expo Maps are also presented in PDF format. The topographic data base was derived from 1:50,000 the NRCAN Geogratis database at; http://geogratis.gc.ca/geogratis/en/index.html. • A Google Earth file “GL140269_Yukon.kml” is included, showing the flight path of each block. Free versions of Google Earth software from: HUhttp://earth.google.com/download-earth.html Flown and processed by: Geotech Ltd. 245 Industrial Parkway North Aurora, Ontario, L4G 4C4 Phone: 905.841.5004 Fax: 905.841.0611 www.geotech.ca