by edwin gaucher, ing., ph.d. september 2007. introduction chronology of exploration what is a beep...
TRANSCRIPT
By
Edwin Gaucher, ing., Ph.D.
September 2007
Introduction
Chronology of exploration
What is a Beep Mat
Why use Beep Mats
Where to use Beep Mats
Is the Beep Mat a proven technology?
References
Instrumentation GDD Inc., 2007 2
A new copper-zinc mining camp (Gaumont, 2007) is being presently drilled off in central Quebec by Breakwater and Virginia Gold.
Two new techniques contributed to the discovery:
Beep Mats InfiniTEM pulse system
3Instrumentation GDD Inc., 2007
Summer 2003: a gossan is spotted from a plane.
August: - Geological crew
- Favourable geology
- Samples: no economical values
September: - Beep Mat crew
- At first, ten bedrock conductors are discovered
- The first two blasted are barren
- The next eight are all in ore. For example: 22.4% zinc
Winter 2004: - Coulon project covers 65 sq. km
- Three promising sulphide lenses…
Beep-MatVTEM survey
Ground MaxMinDiamond drilling
Pulse EM surveysInfiniTEM pulse system survey
4Instrumentation GDD Inc., 2007
Chronology of exploration
Instrumentation GDD Inc., 20075
Winter 2004:
VTEM survey covers all the claims
Beep-Mat followed by MaxMin and pulse EM surveys and DDH result in the discovery of three promising massive sulphide lenses
Following seasons:
InfiniTEM pulse survey discovers a fourth massive sulphide lens too deep for previous work
Geologists discover a fifth sulphide lens
Chronology of exploration
Position of the lenses of massive sulphides
6Instrumentation GDD Inc., 2007
Role of Beep Mats and InfiniTEM
Instrumentation GDD Inc., 2007 7
Beep Mats
1 - They allowed to discover subcrops of the first three ore lenses.
2 – They allowed to blast 80 % of all VTEM airborne EM targets. Up to today, except for the first three ore lenses, none of the others sites sampled seem to have warranted any serious follow up.
InfiniTEM
The deep penetration of the InfiniTEM allowed to discover a new conductor near the three known ore lenses. It became the fourth ore lens.
Author’s «subjective » conclusion
Instrumentation GDD Inc., 2007 8
In a proven mining camp, the odds to discover a new hidden orebody are high, so every valid deep geophysical target warrants to be drilled.
When in moose pastures, barren conductors are so numerous that it is often more cost effective to pre-select them by blasting Beep-Mat targets before using serious geophysics and DDH.
Millions of conductors and geochemical anomalies have been already found in Canada. The fact that no one even walked over them suggests that a lot of people agree that they do not warrant expensive follow up. Still, in my opinion, checking them with Beep Mats is warranted.
Powerful miniaturized electromagnetic survey instrument
Measure conductive and magnetic
outcrops or boulders hidden under
up to 4.5 meters of overburden or snow.
New BM8
- GPS position- Store data for a whole day
9Instrumentation GDD Inc., 2007
Two sizes of BM probe:
- smaller size to be pulled by a single operator
- large size can either be carried by two men or be pulled by a skidoo on the snow or by an ATV.
The operator can be warned by distinct sound.
A conductor, a magnetite or both are detected.
A walking mag can also be simultaneously recorded.
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Main Advantage
A detected conductor can be examined, sampled and assayed.
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Detect the same substances as any airbone or ground EM surveys…
• You don’t know where to start…..• Too many targets to drill…. • Not enough money to drill all the conductors….
Use the Beep Mat and choose the best assays to drill!
Instrumentation GDD Inc., 2007 12
Québec
Canada
Areas covered by shallow glacial Rusty gossansFresh sulfides
Instrumentation GDD Inc., 2007 13
Turkey: Areas of active erosion
Peru: Arid climates
Instrumentation GDD Inc., 2007 14
Inco uses them on conveyors to estimate in real time the NI ore
grade
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Roberson,R., 2004, Virginia makes VMS find in Quebec, The Northern Miner, Volume 90, NO 12, May 14-20.
Archer, P., C. Chapdelaine And F. Huot, 2004, Discovery of High-Grade Metamorphic Volcanogenic Massive Sulfides in the Coulon Belt, James Bay region, Quebec Exploration 2004, MRNF, Quebec.
Archer, P., 2007, Verbal communications.
Gaumond, A,P. Archer and A. Laliberté, 2007, Projet Coulon JV, http://www.virginia.qc.ca/ajouts/communiques/2007/11juillet_fr.htm.