Instrumentation GDD Inc. 2018-01-16 4
Thank you for choosin the MPP-EM2S+ Multi Parameter Probe developed by Instrumentation GDD
Inc. to help you optimize your prospectin efforts. This probe will help you to better determine the
nature, the exact position as well as the intensity of ma netic/conductive horizons alon your cores
and samples. The simplicity of the measurement process and the automatic recordin will allow you
to easily obtain conductivity and ma netic susceptibility profiles correspondin to the core.
Here are the key benefits of the new MPP-EM2S+ probe:
•It provides you the ability to measure at all time the ma netic susceptibility with or without the
presence of a conductor such as pyrrhotite.
•It has improved software to measure in continuous mode usin a time base with specific len ths
of your choice.
•It is equipped with new software to quickly create a profile from the measurements taken in
continuous mode.
Because the probe's response towards a conductor is similar to a conventional electroma netic (EM)
survey's response, it will provide you more si nificant information than an ohmmeter or a visual
interpretation would do. To ive an example, if the conductive zones of your core are evaluated by an
ohmmeter, the occurrence of chalcopyrite will induce a readin correspondin to a conductive zone.
In fact, chalcopyrite, even if it seems massive, will often not produce an anomaly detectable by an EM
survey. Alon the core, the MPP-EM2S+ probe will have a similar response as the EM response and
will only indicate the conductors detectable by this type of survey. The use of the MPP-EM2S+ probe
could, therefore, prevent you to be innin an EM survey campai n for a type of ore that would not
respond to this approach.
In the previous example, the phenomenon that explains the absence of conductivity is probably
related to the chalcopyrite ore distribution in the sample. If the chalcopyrite rains are not touchin
each other but are linked only by very thin filaments, the ohmmeter will detect the conductor
presence because of these tiny filaments connectin them. However, the rains, bein linked only by
those filaments, will not form a sufficient surface to be detected by the probe.
For an equivalent content of conductive material, the probe’s response will be hi her in function of
the conductor's surface. You could try the followin experience. Take an aluminium paper foil (a few
cm²), put the probe on the sheet and note the intensity of the anomaly. Roll the sheet in a small ball,
put the probe on the ball and take the readin a ain. You will see that the intensity of the anomaly is
hi her for a lar er contact surface even if the substance conductivity and quality are the same.
1. Introduction
