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Can anyone shed some light on resources for mapping the strike zone on topo maps when out in the field?
Thanks in advance
Thanks in advance
bbayjohn said:something like this mabe? You can download google earth to your phone or gps and run your selected map on it.
http://golddetecting.forumotion.net/t2273-historical-gold-mines-in-google-earth
SWright said:G'Day Bjarvie
I was an exploration geologist so might be able to help. First of all you have to know exactly where you are on the map or aerial photo. Or if you are using an electronic device the same thing applies. Get hold of a geological compass or a prismatic compass will also do. Go to the vein and take a reading of the direction of the vein, rock, cleavage, bedding or whatever the feature is you want to measure. That is the strike of the unit. Correct the reading for magnetic drift and you will have a true strike at that point. I would take several readings all over a unit from one end to another.
If you cannot get hold of a compass and you have a large scale map simply plot the position of one end of the vein and then go and locate the other end of the vein and the line between them is the strike when you plot it on a map. Beware though that in rugged terrain there will be distortions to the true strike if the vein is dipping at a shallower angle than the vertical. Also not all strikes measured on individual veins by any means represents the true strike of the vein systems as a whole.
Araluen
Ive done a bit of strike mapping using waypionts logged on a GPS then converting to a KMZ file and uploading to Google earth. then looking at theextension at either end for and indications of further mineralization or cross faulting that may have cut off the lode or reef. or shifted it off the line of strike.bjarvie said:Can anyone shed some light on resources for mapping the strike zone on topo maps when out in the field?
Thanks in advance
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