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Terrahertz Ventures Maps Underground Resources Using Accelerometers
TerraMini
Terrahertz Ventures uses patented technology to provide clients with high-quality geological analytics. Central to Terrahertz Ventures analytical methods is the TerraMini data logger, which is based on the GCDC MEL-x2 data logger.
How it Works
The Terrahertz Ventures system uses extremely low-frequency gravitational signals to detect and map underground resources. The process begins with the deployment multiple accelerometer sensor units — the TerraMini — around the area of interest. Because the relevant signals exist at microhertz-level frequencies, these sensors continuously measure tiny gravitational variations over several weeks time.
Once the data is gathered, it is processed using Fast Fourier Transform (FFT) techniques to convert the time-domain measurements into frequency-domain signals. The analysis algorithm filters out frequencies above a designated threshold to isolate the low-frequency gravitational components that are most informative about subsurface mass distributions. After filtering, the processed signals are compared across multiple sensor locations. Differences in amplitude and frequency patterns allow the system to triangulate the position, size, and characteristics of underground features. The individual signals are combined to generate a three-dimensional map or prediction of subsurface resources.
The primary applications of this technology lie in geological exploration. It can identify deposits of water, minerals, hydrocarbons, or other mass concentrations without the invasiveness or cost of traditional methods like drilling or seismic surveys. Furthermore, the method provides predictions of ore grades for gold and silver at depths. By analyzing gravitational signatures, the Terrahertz Ventures provides a non-destructive tool for resource mapping in mining, oil and gas exploration, groundwater assessment, and environmental surveying.
TerraMini
The TerraMini is based on the GCDC MEL-x2 and developed specifically for Terrahertz. The TerraMini includes a very high performance 2g digital MEMS type accelerometer with 20bit resolution. This allows measurements of about 4 micro-G acceleration (0.0000039G). Such precision is well suited for structural health monitoring of buildings and bridges or, in the case of Terrahertz, monitoring minute changes in gravity. The TerraMini is power by two D-cell batteries that enable the logger to continually record data for 2-4 weeks, which allows for determining micro-hertz frequency signals.
- completely self-contained data recording device
- records continually for 4 weeks using 2 alkaline D-cell batteries
- data stored onto microSD flash memory card
- data stored as simple text files
- 3-axis 2g MEMS accelerometer with 20bit resolution
- Accurate time stamped data using RTC (add GPS option for GPS sync’d clock)
- small weatherproof box, about 6x4x2 inches