Marschall Acoustics Instruments Pty Ltd

Marschall Acoustics Group
Marschall Acoustics®

Bespoke Geophysical & Audio Domain Solutions







Identifies Selected Element Groups of the Periodic Table

MAI's TriAnalyzer Metal Detector/Classifier sensor shown with optional sled deployed via a 4WD vehicle. Rack-mounted Classifier Unit and 12VDC deep cycle marine battery were temporarily installed in the rear compartment with the operator seated nearby.


System Development
The TriAnalyzer was developed by MAI specifically to overcome the inadequacies of conventional metal detectors and ground penetrating radar, addressing the requirements of small to medium-size hard rock exploration and mining companies. The TriAnalyzer detects and identifies concentrations of Group VIIIB, IB, and certain IIIA and IVA metals of the Periodic Table of Elements, either separately or in combination. Coverage is in a swath approximately 1 meter wide to depths of 2-3 meters. Continual improvements to sensor handling and increased functionality enable better depth location for minerals of interest.

Efficient Exploration Operations
Deployment of the sensor behind a suitable vehicle with the optional sled allows exploration surveys to determine and target metal concentrations at a brisk pace with far fewer false positives ("hot rocks" and "junk") than other methods in common use. The Classifier Unit can be temporarily installed in the vehicle and is controlled by the nominated operator. Greater depths can be achieved by employing additional receivers at greater offsets

Assay Returns Positive Results
MAI's TriAnalyzer Metal Detector/Classifier System has been fielded at several sites in Australia. Unlike most metal detectors and all ground penetrating radars, the TriAnalyzer had no problems penetrating ironstone and conductive clays. The Classifier (group chemical identifier) correctly identified significant concentrations of metals in the groups of interest. Although the metals of Group 1B (copper, silver, gold) appear identical to the Classifier Unit, it does not confuse them with iron, zinc, or other metals. Ferrous scrap and other low value metal compounds are identifiable as such, thus saving valuable time and effort by prospectors, exploration geologists, and geophysicists.

Unlike hand-held metal detectors that only reach to depths easily accessible with a hand shovel, the TriAnalyzer reaches down to depths of several meters. A drill-rig or back-hoe is distinctly useful to extract samples of materials identified by the TriAnalyzer. A field geochemical laboratory kit is helpful in preliminary determination of sample contents and concentrations.