The FastSnap is the ultimate TEM System for groundwater and environmental investigations
The FastSnap offers the best near surface resolution of any TEM system in its class making it equally ideal for shallow environmental applications as it is for deeper exploration work. It has the fastest possible turn-off time, 40 MHz sampling and PC controlled damping resistors in the transmitter. The high powered 20 A (or 30 A upgraded) transmitter ensures that considerable depth penetration is achieved. The automated acquisition software ensures that the highest possible data quality is achieved at all stages of the decay curve for any given configuration.
Groundwater Prospectivity Mapping
T
he image to the right (double click to enlarge) shows a groundwater prospectivity map. The image below shows a profile of inverted data from the same project. The darker areas in the top image correspond to areas were likely aquifer layers are most common and thickest at explorable depths (0-50 m). The map was created by overlaying resistivity depth slices showing areas with electrical resistivity similar to the ground water EC measured in boreholes.
Survey Specifications
- Survey Location: Cambodia
- Transmitter loop size: 40 m x 40 m
- Receiver loop size: 10m x 10m
- Depth penetration: 150 m +
TEM is often the most suitable technique for groundwater investigations. Common applications include mapping the location, depth and thickness of aquifers. Assessing potential connectivity between different aquifers by mapping faults and mapping salt water intrusions into fresh water aquifers.
TEM can provide a cost effective alternative or supplement to drilling in many situations, especially where connectivity between aquifers and flow pathways between boreholes are unknown.
Aquifer Mapping
The image to the right (double click to enlarge) shows the modelled FastSnap data (above) and Hydrological interpretation (below).
Survey Specification:
- Transmitter loop size: 50 m x 50 m
- Receiver loop size: 10m x 10m
- Depth penetration: 150 m +
TEM is often the most suitable technique for groundwater investigations. Common applications include mapping the location, depth and thickness of aquifers. Assessing potential connectivity between different aquifers by mapping faults and mapping salt water intrusions into fresh water aquifers.
TEM can provide a cost effective alternative or supplement to drilling in many situations, especially where connectivity between aquifers and flow pathways between boreholes are unknown.
Groundwater Contaminant Mapping
TEM is very effective for mapping of contaminant plumes and flow pathways. In this example, flow pathways were mapped in an area contaminated with hydrocarbons. The image to the right (double click to enlarge) shows modelled FastSnap data presented as depth/elevation slices. The location, size and attitude of the flow pathways are clearly visible (blue).
Survey Specification:
- Transmitter loop size: 50 m x 50 m
- Receiver loop size: 10m x 10m
- Depth penetration: 150 m +