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
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.
Returns Positive Results
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.
consumer grade metal detectors look for a change of inductance at
one frequency or another with transmissions that can be powered
from small hand-held battery packs.
TriAnalyzer Metal Detector/Classifier instead looks for received
electromagnetic field imbalances over a broad extremely low
frequency band. The transmitter emits a high power (tens to
hundreds of Watts) broadband signal with a controlled polarization
and beam-pattern. The different groups of the Periodic Table
have spectrally different scattering responses to these signals.
large receiver sensor and sensitive ultra-low noise preamplifier
system picks up these responses from subsurface objects and feeds
them to the processing unit for display.
include signal strength for three groupings of metallic elements
and an overall received response display.
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.