September 16, 2009
VTEM detects the Night Hawk Lake conductor from 705 m above.
Read the case study (PDF)
March 24, 2009
BENTON RESOURCES, ROYAL ROADS & GOLDEN DORY APPROVE 2009 PROGRAM FOR LONG RANGE NICKEL JOINT VENTURE, NEWFOUNDLAND – DRILL TARGETS IDENTIFIED
"... Among the targets selected for further work is a 600 metre long VTEM conductive anomaly described by Geotech Ltd. as “a relatively strong conductor consistent with massive sulphides”. This target has been selected for testing by diamond drilling, and it is anticipated that additional targets will be developed from results of the prospecting and ground geophysical surveys."
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VTEM | Airborne Gravity | AFMAG | Hummingbird | Hawk
Hummingbird Digital Helicopter Electromagnetic System
The Hummingbird Electromagnetic System was the first successful all Digital Frequency Domain Electromagnetic System. Designed in the early 1990's it employs a novel weight-saving design coupled with advanced digital technology. Continual development over the past 10 years has maintained the multi-frequency Hummingbird as the most advanced Frequency Domain EM System to this day. In addition the low weight design allows the helicopter pilot to get right down to the bottom of valleys, thus providing superior contouring accuracy.
| Specifications: | |
|---|---|
| Frequency Range: | 880Hz, 980Hz, 6600Hz 7000Hz, 35kHz |
| Coil Orientation: | Horizontal coplanar and vertical coaxial coil sets |
| Output: | Inphase and quadrature samples (ppm) |
| Transmitting Power: | Up to 250 NIA |
| Sampling Rate: | 40Hz |
| Noise Level: | 2.0 ppm or less |
| Time Constant: | Adjustable under software control |
| Filters: | 50/60 Hz power line and sferic rejection 4th order digital, 15Hz 2nd order analog and 5Hz Low Pass 6th order digital |
| Console Computer: | Lightweight industrial Intel Pentium CPU |
| Display: | Detachable sunlight visible TFT 10.4 inch color LCD |
| Data Acquisition: | 540 MB removable PCMCIA Hard Disk |
| Power Requirement: | 22-28 VDC, maximum 30 Amps |
| Operating Temperature: | -40 C to + 45 C |
| Magnetometer: | Geometric Cesium |
| Navigation: | GPS GEONAV with differential capabilities |