Hi Stephen- you've offered food for thought! -Here're some links for those who wish to learn a little more about geophysical survey methods, etc.
(I've been on the prowl again, thought I'd share):
A must for learning about- gravity, magnetics, DC resistivity, seismic & more (online schooling: Introduction to Geophysical Exploration):
magma.mines.edu
The above link & many related links can be found here:
Geophysics Reference Materials:
uh.edu
LEARN about- Geophysics: More Than Numbers Processing and Presentation of Geophysical Data (extensive write-up!):
geosoft.com
-also:
geosoft.com
A great reference about Inferring Geology from Geophysics:
(STUNNING images from var. geophysical surveys)
ned.dem.csiro.au
See a couple examples of DTM (Digital Terrain Models):
getech.com
WRT ('With Regard To') aeromag surveys & costs in AB,
see these 2 sites for specifics-
-Spectra Exploration Geoscience:
spectra-expl.com
-and, GEDCO:
gedco.com
And visit here for a co. discussion of Geomagnetism:
agso.gov.au
The slow, smooth change in the average geomagnetic field that occurs over many years, is caused by fluid movements in the Earth's core and is known as the secular variation. Accurate secular variation information is needed to update old field survey data, as used by the petroleum and mineral exploration industries, and for merging data from surveys made at different times.
_ _ _ _ _ _
Much more out there, but for those who care to learn about this topic, it should get ya started. Those who don't, move onward!
Cheers,
-j
:>
PS-- Stephen, as U know, there is a lot to finally choosing a drill target. Much geophysical data comparison & interpretation is required.
-Visit Marum's website for more examples of such kinds of data:
marumresources.com
(also, when there, click on the "Photos/Maps" link) |
