Introduction - GDD Instrumentation MPP3wifi Instruction Manual

1. Introduction

Thank you for choosing the MPP3wifi Multi Parameter Probe developed by Instrumentation GDD inc.
to help you optimizing your prospecting efforts. This probe will help you to better determine the
nature, the exact position as well as the intensity of magnetic/conductive horizons along your cores
and samples. The simplicity of the measurement process and the automatic recording will allow you
to easily obtain conductivity and magnetic susceptibility profiles corresponding to the core.
Here are the key benefits of the MPP3wifi probe:

It provides you the ability to measure at all time the magnetic susceptibility with or without the
presence of a conductor.

Our software allows to measure in continuous mode using a time base with specific lengths of
your choice.

The new MPP web interface allows users to control the MPP probe through a web application
from any device having a web browser (laptop computer, smartphone, tablet, etc.). The data are
stored in the probe itself and the project files can be recalled.
The conductivity values yielded by the MPP probe are generated from our Frequency-Domain EM
inbuilt system. The presence of conductive material in your core or rock sample will induce an EM
response if:
1- It is composed of conductive minerals;
Refer to the literature to learn more about the electrical properties of different minerals, soils,
materials... In general, the EM conductivity of pyrite < magnetite < chalcopyrite < pyrrhotite.
2- Those conductive minerals are interconnected, generating a significant volume;
Note that a small vein of a very conductive mineral may yield a stronger EM conductivity than a large
zone of a moderately conductive massive sulphide. In addition, for an equivalent content of
conductive material, the MPP probe EM response will be proportional to the conductor's surface. You
could try the following 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 reading again. You will see that the intensity of the anomaly is higher for a larger contact
surface even if the substance conductivity and quality are the same.
The MPP probe represents a useful tool when it comes to plan an airborne, ground or borehole EM
survey allowing one to validate whether or not the exploration target is conductive (EM) or not.
Instrumentation GDD inc. 2017-08-21 4