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Favorable Gold Geology


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Most areas I work in have little to virtually no information to reaserch.

The geo maps of the areas have virtually no info on them like faults, intrusions and different rock types.

So I mark all of these features allong with any gold that I find on my GIS mapping software and make my own maps of the area and project the features by studying specialist satellite image's in relation to the information I have obtained by in the field mapping and our gold finds.

This is alot of work but this is why we are so successful.

There is always a reason that the gold is there and there's always an indicator!

It is up to the smart patient prospector to first find the gold, then identify the indicator and project its directon and follow it to more GOLD!!!!

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I am learning a ton of stuff from a book I bought called:

 

Introductory Prospecting and Mining by Leo and Michael- Mark Anthony, 9th revised edition, 2005. The print is small but readable, tons of info on sampling, various techniques to use including geochemical testing, use of Dip Needles and proton magnetometers to locate placer and magnetic ore bodies, water sample testing to locate ore bodies, resistivity and electrical methods of tracking potential ore bodies. It is targeted to Alaska gold prospectors specifically but lessons learned could apply anywhere. It explains various rock types, just wish it had color photos which it has none of any kind. I am hi-liting things as I read for future reference.

 

-Tom

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Branched from known gold areas, into fringe areas many years back, if I find quartz I concentrate on that area heavily, whether Igneous, Metamorphic or Sedimentary. Have had surprising finds in Limestone, wolfram, coal and tin "country". This has taught me not to be focused on any particular country as Steve`s detailed post points out, even to the extent of stop thinking it`d be better over there where the country "looks better", gold certainly is where it tis and the most distributed  native metal on earth.

Does not take long to detect creeks, alluvial gold can lead to the elluvial gold, which can be multiple signals per swing, this methods is little different  to the original prospectors except the use of detectors rather than pans, GPS`s, moving map software, digital geo, topo maps and our 4WD`s give us a huge advantage. Time positive detecting, lovely finding a creek with nothing but gold signals. I don`t know if this applies to all countries but certainly does to the country I prospect.

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Goldhound wrote,   "It is up to the smart patient prospector to first find the gold, then identify the indicator and project its directon and follow it to more GOLD!!!! I have read that some early Australian fossickers followed a black indicator line as thin as a pencil and it would be right off the gold shedding reef, have you ever seen one of these lines? I believe they are a carbon make up.

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I'm trying to understand the relationship between gold and diorite. I probably seen it a million times, but I thought it was just granite.

Diorite is a very hard fine gained igneous rock.

It is usually black or grey and weathers round like granites.

The soil produced by weathering diorite is dark grey and sandy further from the source and very close to the source it can be red/brown.

Re-read my conclusion as to why the gold was there.

Any igneous intrusion in the right country rock can create a auriferous contact aureole.

Some times the aureole can extend for a fair distance from the intrusion.

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This is great stuff Gold Hound and it is starting to make sense, but being geologically impaired I realize that I have a long way to go.  Yet you have given me some ideas to use that may put me on to more gold after the first piece is found.  One that comes to mind is recording the elevation of the patch and following that trend around the hill and adjoing areas to see if it outcrops again, also paying attention to the type of rock that the gold is associated with, even if I don`t know its make up.

Need to slow down  and become more observant.

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Metal detecting is easy!
Prospecting is a whole other kettle of fish!

To become a proficient prospector takes many many years of hard field work and study.

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I`ll generalise a wee, when detecting you`ll often come across even just a small change in the country, something that is not shown on the geo map. Doesn`t even have to be a mineralised change(but helps), a topo change or even just a vegetation change. Concentrate there too, the main thing is not to dismiss in your mind there is no gold in a particular piece of ground until you`ve detected it. Keep the mind open and have faith in where you are.

In NQ OZ we have a low fine grass nicknamed copper grass, it has a coppery sheen, can be a indicator. But I stress can be, not always same as mentioned in an earlier post, a stand of Cyprus pine can be a indicator. Rege-PA, I have prospected with a couple of Geo`s, and again I`m generalising, they get it wrong too, very good to listen to, to gain knowledge but a closed mind is like waving a detector with a flat battery. There is only one constant, it Tis where it tis, sounds obvious but is true and worth repeating. That field work as Gold Hound mentions is important, but for me, more so than study. I`m definitely geologically impaired.

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