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Dear
Colleague:
Welcome to Quantum, a periodic e-newsletter for
professionals working with magnetic technologies. Quantum
is designed to keep you up to speed on applications, case
histories, and evolutions of quantum magnetometers in a variety
of disciplines.
In this
issue:
Complete Our 10
Minute Survey – And Win a
Chance for a Mini Digital Video Camera
(Top)
Have you ever wondered, "How do
companies determine priorities for new product development and
client servicing?" The best way we know is to go directly to the
source ... our customers ... who are working on a daily basis
with technology and who have great insights into functional
enhancements!
So, now, we're asking for your
help. We would like to be able to include your thoughts
into upcoming product and other developments. That's why we have
prepared a short online survey ... that should take no more than
ten minutes of your time to finish.
The survey is also set up to
allow you to enter your name into a random drawing for a Mini
Digital Video Camera ... the world's smallest such device
according to the manufacturer. Odds of winning are good, so we
wish you good luck with your entry.
3.1M DigiGR8 DV-182 Mini Digital Video Camera Camcorder
To get started, simply click
here and the survey will load
into your web browser automatically. Note that entries MUST BE
RECEIVED by Friday, July 15 at 5:00pm Eastern Standard Time. GEM
employees and employees of GEM's agents / representatives are
not eligible for the prize draw.
Customer Service
- Update Your Warranty Online for Fast
Access to Updates
(Top)
GEM is pleased to offer the
longest warranty in the geophysical instrumentation industry as
a demonstration of its confidence in the quality of its
products. All GEM products are waranteed to the original
purchaser against defective parts and workmanship for two (2)
years from the date of original shipping. A summary document of
the precise TERMS and CONDITIONS is provided at
http://www.gemsys.ca/GEM_warranty_card.htm
As part of its customer service
program, GEM recently implemented an Online Maintenance
capability for all customers using its magnetometers. Click the
link above and you will also see a series of entry fields at the
bottom of the form. Simply complete the form and submit and your
warranty will be forwarded directly to us.
Then, you will be all ready for
any updates that GEM prepares – a timely way to acquire new and
upgraded features via the Internet.
The
Tri-Directional Helicopter Gradiometer from GEM was the first
three-axis gradiometer developed globally. Since its inception
in the mid 1980s, the system has been outfitted with optically
pumped Potassium sensors and has evolved into a reliable
platform for different applications, including mineral
exploration.
Tridirectional Sensor with
Helicopter and Sample High Resolution Data
This special
gradiometer consists of a three-armed towed bird configured with
4 sensors for calculation of magnetic gradients, including
vertical and horizontal across and along track gradients.
Additional components include GPS for accurate positioning of
the bird during flight. Data capture is either to the GSMP-30A
acquisition console or a 3rd party unit.
EAGE's First
Break is publishing a paper on the Tridirectional system in its
July, 2005 issue. This paper reviews the principles of optically
pumped Potassium magnetometers and the Tri-Directional
Gradiometer, continuing with a discussion of Tri-Directional
Design considerations, and concluding with a discussion of the
role of magnetic gradients in mineral exploration (and other
applications). To access your copy, click
here.
GEM has written a short paper
to
summarize the recent proceedings of the National Parks Service
Archaeology Workshop in Chillicothe, Ohio. The Workshop held May
16 to 20, 2005 brought together many of the top instructors and
students in the
United States
to learn about the state-of-the-art in geophysical surveying and
methods, such as magnetics. Morning sessions of this exciting
workshop dealt with the theoretical and practical aspects of
geophysics; afternoon sessions were spent at one of three sites
in the Chillicothe area.
The Mounds
Site, Chilicothe, Ohio
Chillicothe is of much interest to archaeologists
as it was the site of a civilization that inhabited the area
from approximately 300 B.C. to 600 A.D. Had the native features
in the area not been largely destroyed through farming, it was
postulated by one group leader that the Chillicothe site would
have been the equivalent of the “North American Pyramids”. The
site was purchased by the National Parks Service over the last
decade or so, and as such, there is now a huge area to test to
determine the properties of the subsurface … the main record
that remains intact.
To download your copy of the
paper, which provides Geophysical Tips for archaeological
practitioners, click
here.
Earthquake Prediction
- SuperGrad System Installed in Mexico
(Top)
Interest
continues to be expressed in GEM's SuperGrad system for
earthquake prediction monitoring and research. The latest
example is the Mexican group,
Universidad
Nacional Autónoma de
México
(UNAM),
which recently installed a SuperGrad system with technical
assistance from GEM.
GEM Personnel Shown with Sensor
Cover (white drum to left), Sensor Cable, Sensor with
Protective Heat-Resistant Covering, and Instrumentation Box
The proposed
site near the coast in the state of Oaxaca was first surveyed
with a GSM-19WG Gradiometer. This information was used to select
sensor locations (i.e. in locations with very small gradients
for best resolution of earthquake signals). Other steps in the
procedure were to:
-
Install
concrete pillars for supporting sensors (1 day)
-
Install
sensors and cabling (1 day)
-
Configure
electronics boxes (1 day)
-
Set up power
supply, comprising solar power and batteries (2 days)
-
Test system (1
to 3 days)
The next steps in the process are
to monitor telemetered data with the aim of spotting potential
precursors to earthquakes or other responses that may help
characterize earthquakes magnetically. Results will be reported
periodically in Quantum and on GEM's web site (www.gemsys.ca).
One of the best ways to
understand the advantages and disadvantages of different
geophysical methods for specific earth science challenges is
through case histories.
Since May 2004, GEM has been
meticulously tracking press releases to determine whether there
is information of value to our GEM user community. Happily,
there are some interesting results with a variety of deposit
types -- ranging from diamonds to gold to base metal
exploration.
To access your copy of these
case histories, you simply need to read GEM's Blog (an
electronic diary containing original versions of press releases.
This information can be invaluable in determining which
magnetometer to use as well as the advantages and limitations of
magnetics in certain applications.
For more information, please
visit
http://gem-advanced-magnetometers.blogspot.com/
The Chinese Earthquake Administration is taking
delivery on a substantial order for GSM-90 EUROMAG
magnetometers. The systems will be employed across China
as part of its earthquake monitoring program.
CEA ordered the GSM-90 F1 model,
so called because it samples up to one sample a second (standard
monitoring period described by geomagnetic organizations and
bodies, such as Intermagnet.
GEM's new version 7.0
magnetometers and gradiometers offer a number of benefits for
existing users and for customers considering a purchase. These
include:
-
Data Import (import using
lines easily as per Geosoft, Encom, Intrepid standards)
-
Programmable Export Format
(fully control data export)
-
Picket Marking / Annotation
(annotate relevant positions easily in the field for later
interpretation)
-
GPS Elevation (provides "Z"
data for numerical modeling)
-
<1.5m GPS Capability
(desirable for higher resolution surveying)
-
Enhanced Positioning
Resolution (desirable for higher resolution surveying)
-
USB Adapter (transfer data
easily from console to latest version Personal Computers)
There are also other features
included as part of the release.
To access a
summary of the features noted above and to view relevant
documentation changes, please click
here. A
release document will be provided for your quick review.
New
technologies offer data quality and high sampling for effective
decision-making. Some of the leading technology-movers are the
magnetometer and gradiometer - both ground and airborne - which
continue to evolve through persistent, progressive and
productive research and development (R&D). GEM is at the
forefront of these developments -- reinforcing the
company's reputation as the sector's most dynamic magnetic
technology provider.
For those
of you who work with magnetic technologies regularly, you will
recognize that changes in magnetometer and gradiometer systems
are occurring both on the ground and in the air - with changes
reflecting industry needs in the modern exploration era. To
learn more about evolutions in ground and airborne magnetics,
click
here.
GEM is pleased to
prepare its Quantum
E-newsletter and distribute it approximately three to four times
a year. However, we find that changes in technology and methods
are changing rapidly; and it is more appropriate to communicate
more frequently ... on a just-in-time basis, as soon as we
become aware of new technologies and changes.
For this
purpose, we have developed a new communication vehicle, that we
affectionately call, "Magnetic Moments." The name is, of course,
has a double meaning; referring to both the definition of a
moment as "a
vector
relating the aligning
torque
in a magnetic field experienced by the object to the field
vector itself" and
also, the timeframe for reading GEM's Magnetic Moments.
Magnetic Moments are intended to
be very short reviews of technology that provide a complete, yet
concise description of a topic. Sample topics include:
-
How Deep Can My
Magnetometer See?
-
Six Most Critical
Challenges in Ground Magnetometer Surveys
-
Your Magnetometer: Three
New Tricks for a Tried-and-True Method
-
... and More ...
We now envision publishing three to four issues of Quantum along
with six to eight issues of Magnetic Moments per year ... with
the goal of providing you, our customer, with the most
up-to-date information possible about the state of the
magnetometer industry and the ways in which you can use your
system most effectively.
The Last Word – Comments from Our
Customers
(Top)
As usual,
we leave the last word to our customers – our key focus in
ensuring that we continue to serve the market effectively and to
our customers’ satisfaction.
"We have recently purchased the GSMP-40
Potassium Gradiometer from GEM Advanced Magnetometers for the
Colorado School of Mines. The GSMP-40 has proven valuable for
both independent research applications and especially for
educational purposes. The ability of the GSMP-40 to rapidly
gather high quality data has helped Mines keep our students on
the leading edge of both applied and theoretical aspects of
magnetic and magnetic gradient methods for geophysical
exploration. Likewise, the gradiometer has proven valuable for
quickly identifying underground utility targets on the Mines
campus, where construction plans require knowledge of these
targets in advance.
In addition to the quality of the GSMP-40 gradiometer, I have
found the quality and service of GEM Advanced Magnetometers
staff to be wonderful. They have taken all comments, questions,
concerns and requests seriously and have acted in a timely maner
on each. In particular, they have gone above and beyond
traditional support center obligations by immediately modifying
the magnetometer's software design at our request to improve
data output quality and ease of teaching for large numbers of
students."
Richard Krahenbuhl
Ph.D. Candidate
Colorado School of Mines
"We took our GSMP-40 to North Dakota for a field project this
summer and
it worked wonderfully. Our intent was to compare the data
recovered with the
GSMP-40 to that recovered with a fluxgate gradiometer earlier.
The GSMP-40
was MUCH faster and collected the data in a fraction of the
time."
Dr. Tommy Ike Hailey
Northwestern State University
"We have four of your Overhauser magnetometers, GSM-19
(Standard Overhauser) and GSM-90 (EUROMAG). We are very
satisfied
with them, and are now considering buying more."
Bjorn Ove
Auroral Observatory
University of Tromso
"We have had the GSM-19T (Proton) instrument for
the last 5 years. It is giving very good results."
Dr.Vinit
C. Erram
Indian Institute of Geomagnetism
"Good website!"
Jamal
Mbarak
Shatry Gems Ltd.
Important Note: Our goal is
to only communicate with people who would like to hear from us.
If you would like to stop your subscription, please
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Copyright 2005. GEM Systems, Inc. Advanced Magnetometers.
All rights reserved with the exception of organizations that
have contributed links to this issue. Our thanks to the contributors who have
made this edition possible, and who are identified in the text of related articles
or through their company websites. Note that some quotes relating
to industry-specific trends may have been obtained from public-domain
sources, and are not intended to promote GEM Systems,
Inc. Other examples may not necessarily reflect GEM products;
rather these examples are intended to illustrate the use of
magnetics and magnetometry for selected applications.
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