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Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Published on: May 11, 2014

Surface distributed acoustic sensing for mineral exploration.

Lea Gyger¹, Alireza Malehmir², Musa Manzi³

¹Department of Earth Sciences, Uppsala University, Uppsala, Sweden. lea.gyger@geo.uu.se.

Scientific Reports

|December 9, 2025

Summary

This summary is machine-generated.

Surface distributed acoustic sensing (DAS) shows promise for mineral exploration. This seismic technology can delineate deep iron-oxide deposits and geological structures, despite data quality variations.

Keywords:

Distributed acoustic sensing Hardrock Mineral exploration Reflection seismology

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Area of Science:

Geophysics
Mineral Exploration
Seismic Technology

Background:

Distributed Acoustic Sensing (DAS) is established for vertical seismic profiling but not widely used for surface reflection seismology.
Surface DAS arrays face challenges in cost-effectiveness and successful implementation for mineral exploration due to fiber-optic cable sensitivity.

Purpose of the Study:

To investigate the feasibility and performance of surface DAS technology for mineral exploration in a hardrock environment.
To assess the potential of DAS for deep targeting of mineral deposits.

Main Methods:

A fiber-optic cable was deployed on the surface above a known iron-oxide deposit in Sweden.
The cable was lightly covered with gravel to enhance ground coupling.
A specialized processing workflow was applied to address inherent noise in DAS data.

Main Results:

Mineralization was successfully delineated in raw receiver gathers, despite variable data quality along the cable.
The processing workflow enabled imaging of the iron-oxide deposit and surrounding geological structures.
A fault system potentially responsible for deposit termination at depth was identified.

Conclusions:

Surface DAS is a viable technology for mineral exploration, particularly for deep targeting in hardrock environments.
Further development of DAS technology and processing workflows can overcome current limitations.
This study justifies continued research and development for surface DAS applications in geophysics.