Description

Micro-Seismic Resonance (MSR) is a lithological mapping technique that pinpoints high resonance zones within the subsurface, highlighting features such as differential weathering, cavities, fractures, microfractures and increased porosity.

The MSR system operates on the principle of detecting resonance signals, primarily fuelled by various sources of energy inducing both elastic and plastic deformations within the Earth’s crust. Micro seismic activities, often caused by the subtle shifting of tectonic plates or volcanic activity, as well as anthropogenic activities, such as mining, drilling, or other large-scale human operations, all contribute to the acoustic resonances within the crust.

Harnessing this principle, the MSR system becomes an exceptional tool for capturing and analysing these resonance signals. It excels at identifying the stress relief zones, highlighting fracture networks in bedrock, delineating lithological layers, and detecting zones of high resonance indicative of secondary structural features. The MSR system utilises an advanced geophone capable of detecting frequencies as low as 1Hz and beyond 14KHz. An MSR reading can be envisioned as a precise “laser” measurement with acute sensitivity to vertically incident seismic waves, proving invaluable for high-precision drilling target identification. The system’s capability spans a remarkable depth range, with deployments reaching as deep as 2000m and beyond in specific applications.

MSR can be utilised in a variety of scenarios from carstic feature characterisation, to potential flow path detection for dams and contaminants.