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Coal magnetic surveys. Ultra-high resolution ground magnetic surveys for the coal industry.

Coal magnetic surveys are usually done at an ultra-high resolution. That is, with a line spacing of 10m. However the best ground magnetic data I have ever seen was over a gold prospect in Western Australia. The explorer was interested detecting mineralized structures trending east-west AS WELL AS north-south dolomite dikes intersecting the mineralisation. Ground […]

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How to walk straighter and further with less effort when conducting ground geophysical surveys.

Some walk the line straighter than others. Walking straighter lines when conducting ground geophysical surveys increases the production l-km in a day. Alternatively, if there is a fixed amount of work to do in the day, then straighter lines means less walking and less stress on the body. Walking straight in thick vegetation is never […]

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GEM Systems magnetometer navigation firmware now works. Many improvements coming soon!

Modern Mag in conjunction with GEM systems magnetometers is trialing new firmware for the GEM-19 and GSMP-35 series of magnetometers. For many years there has been a fatal flaw in the real time magnetometer navigation function. A programming error caused the lane guidance and distance to end of the line functions to fail, particularly for very long […]

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Geophysics heading corrections

Normally the only data correction applied to ground magnetic data is a diurnal (a.k.a base station) correction. This type of correction simply subtracts the static base station reading from the moving rover magnetometer reading of the same time. Cs vapour sensors also require a geophysics heading correction to account for the changes in magnetic field […]

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Walking the line. Ground magnetic surveys in 2013

As a young geophysicist I paid my dues and walked the ground magnetic survey line kilometers. It is a right of passage that teaches graduate geophysicists design, acquisition and processing skills for the most common potential field dataset. Magnetics. Many of you reading this have no doubt done your time, walking the line. Some of […]

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