So heres my plan....Gonna find that vein!
Posted 27 February 2012 - 06:27 PM
First I need to get a electronic microscope that hooks to the puter!
Ive been looking at it with my eyeloup and im now crosseyed.
I notice some deep brown host rock in it with some flecks of quartz.. Put a magnet to it and it is magnetic. Either that or I found a gold magnet
The nugget was not on bedrock but sandwiched in between gravel with major black sand, and a layer of brown dirt and rocks. It never made it to the bottom.
This was a creek that gave up a nice string of 2-6 grammers up on the bank with about 4 inches of gravel on them. The nug I found yesterday was in the gut of the creek with about a foot of gravel on it. Same stretch of creek. Didnt detect it until we scraped the top layer off.
Different floods at different times I guess
Im thinking of backtracking upstream and along the sides of the stream to try and find a host rock like what is in the nugget.
If anyone has some better suggestions PLEASE let me know.
I will name the first nugget I find after you
Does it look like it traveled very far?
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Posted 27 February 2012 - 07:44 PM
Magnetite ,and Ironstone are so common in arizona that you are bound to be busy looking for a long time to come. Who knows though, maybe there will be some obvious outcrop (assuming it is still there) with a sign on it that says "Free Milling Gold Ore with Magnetite" You never know Tom , and I hope you do locate it. it would be great fun and hard work to dig pure gold out of a reef.
Posted 27 February 2012 - 09:05 PM
I doubt the nugget traveled far, but what is far .... ? 100 ft, 100 yards, 1/4 mile ....
Trying to track down the source is difficult, but not impossible. Most of the veins are long gone, or at least barren and were very thin and small in size. I believe many of the veins in the country where you found those are very thin, sometimes formed within the metamorphic rock such as schist, shale and slates.
Wish I had a better answer on how you can find that Mother Lode!
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Posted 27 February 2012 - 10:21 PM
We have no idea how these pieces of gold travel. Did they break free from the host rock and sit undisturbed for 2000 years and then they were tossed during an earthquake? Were they just swept down a gully with water and got caught where they were found? Perhaps they were in a fist size piece of quartz, that had been tossed and windblown and weathered, and traveled miles as tectonic plates shifted and heaved. Finally it lay undisturbed for thousands of years until a harsh rainfall and a freezing winter night caused the oxidized veins of iron, damp from the rain, to freeze and swell, breaking the piece of quartz open and liberating a small nugget, which was washed into the gully by a rain fall three days later.
If only nuggets could talk.
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Posted 28 February 2012 - 07:41 AM
Tom, you may want to read some pocket hunting articles or books ( loaming to Australians)...those methods might lead you to the source; if there is still a source to find...
Posted 28 February 2012 - 09:51 AM
Maybe we can meet at your site sometime? :-) I never have found a nugget - or a meteorite....
Posted 28 February 2012 - 02:49 PM
Posted 29 February 2012 - 04:46 AM
"I notice some deep brown host rock in it with some flecks of quartz"
Sounds very much like its come out of some Conglomerate or what you blokes call Calliche maybe,
this type of sedimentary rock is found mainly on upper slopes or hill tops, the old blokes in Aus used
to call it "Iron Hat".
Its formed by the weathering and breaking down of Qrtz material in areas of high iron content, it then
re cements into a solid form and is mainly iron mineral with small gritty qrtz, it can also contain small
to large water worn pebbles and in that case it comes from old elevated tertiary river washes.
You can have secondary gold deposited in this type of rock also, and can be from gold fluids draining into
a basin over eons of time and re precipitating into nugget forms.
Keeping all that in mind, i would be taking a stroll around the area up stream and not worrying about gold
but following the brown mineral in the nugget and try trace the rock more than the gold, one will lead
to the other and be easier to track.
Cheers & Beers
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