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RSmith
Posted: Tue Apr 13, 2004 7:33 am
 
other than quartz, what type of rock is associated with gold?
Thanks
 
jacques jedwab
Posted: Tue Apr 13, 2004 9:06 am
 
In article <c5gqp4$fve$1@nntp-stjh-01-01.rogers.nf.net>, "RSmith"
<kpwhite@roadrunner.nf.net> wrote:

[quote:246a2a4718]other than quartz, what type of rock is associated with gold?
Thanks
[/quote:246a2a4718]
Sadly enough (for the systematic mind), gold is where you find it, as old
timers used to say!...

More seriously, there are several ore types and associations, other than
quartz. (Skarns, porphyries, black shales, evaporites,....) New ore types
were even found in modern times, which after all, is astounding and
reassuring (Carlin type deposits=invisible gold).

The topic is immense, and a good ore deposit book would be fine as a
starting point. Depends on how deep you want to dig. A basic book by Boyle
is on the geochemistry of gold (publ. by the Canad. Geol. Survey).

J.J.
 
RSmith
Posted: Wed Apr 14, 2004 5:40 am
 
Thank you very much Garry.A very informative response to my question.I will
print it and use it as a reference source.
Thanks again for your time.
"RSmith" <kpwhite@roadrunner.nf.net> wrote in message
news:c5gqp4$fve$1@nntp-stjh-01-01.rogers.nf.net...
[quote:3cf07d4680]other than quartz, what type of rock is associated with gold?
Thanks

[/quote:3cf07d4680]
 
RSmith
Posted: Wed Apr 14, 2004 6:37 am
 
Mr.Denke,
Would Mafic and felsic volcanic or volcaniclastic rock be a good place to
find gold?
If so,what size "grains" would one expect to find?
Thanks again for any help you could provide.

Mr.K.White.(AKA: RSmith) .
"RSmith" <kpwhite@roadrunner.nf.net> wrote in message
news:c5gqp4$fve$1@nntp-stjh-01-01.rogers.nf.net...
[quote:7c60c5a19c]other than quartz, what type of rock is associated with gold?
Thanks

[/quote:7c60c5a19c]
 
Jim Lillie
Posted: Wed Apr 14, 2004 8:02 am
 
Garry Denke wrote:

[quote:a6454e343d]
Gold forms in close association with volcanoes or is hosted in
volcanic rocks. Three environments/styles are most common: gold in
greenstone belts, gold in porphyry deposits, and gold in epithermal
deposits.

[/quote:a6454e343d]
Sir -
Thank you for a very informative post.
Saved for reference.


Jim Lillie
 
rick++
Posted: Wed Apr 14, 2004 9:28 am
 
[quote:25efb318d9]Gold forms in close association with volcanoes or is hosted in
volcanic rocks. Three environments/styles are most common: gold in
greenstone belts, gold in porphyry deposits, and gold in epithermal
deposits.
[/quote:25efb318d9]
Good summary of primary gold deposits.
However many of these source rocks are worn into sediments and carried
along riverways. Gold flakes survive the fluvial forces fairly well
and then settle out into sand and mud due to their weight.
Some of the famous California deposits were in primary rocks in the
core Sierras while much was along the Sacramento and other rivers.
The most exciting California gold plays are in fossil rivers
detected by petroleum prospecting methods.
This applies too in the Rockies, southern Africa, etc.
 
Garry Denke
Posted: Wed Apr 14, 2004 3:36 pm
 
mafic + volcanic + gold + grain size
http://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=mafic+%2B+volcanic+%2B+gold+%2B+grain+size&btnG=Google+Search

felsic + volcanic + gold + grain size
http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=felsic+%2B+volcanic+%2B+gold+%2B+grain+size&btnG=Search

volcaniclastic + volcanic + gold + grain size
http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=volcaniclastic+%2B+volcanic+%2B+gold+%2B+grain+size&btnG=Search

Happy hunting.
 
Sir Jean-Paul Turcaud
Posted: Thu Apr 15, 2004 9:43 am
 
The funny thing is none of the replies emanate from any people with ANY
finds at their credit !
Incredible how the University brainwashed blokes, are so sure to know the
right story !
.... but completely unable to find any mining deposits indeed !

Problems there ! Hey ?

My injunction to any of those guys, at this point in time, would be :
<<
If you are so good at that game, go and find some ! >>

....and this is a clear demonstration for all to see, of that evident fraud
which is the present Gogology !

PATHETIC !!!!

--
Sir Jean-Paul Turcaud
Australian Mining Pioneer
Hydro & Mining Prospector _ Senior Geologist
Discoverer & Legal Owner of Telfer; Kintyre & Nifty Mines
The Great Sandy Desert.of Australia
Discoverer of the South Atlantic Submarine Gold Placers
( 40 Millions Tons estimate )
Founder of the TRUE GEOLOGY


"THE GOLDEN RULE"
"Gold and Intrigue in the Desert"
"The true story of the discovery of the Telfer gold mine"
Author : Bob Sheppard, President of the Australian Prospectors' Union
Author's contact & web page : www.tnet.com.au/~warrigal/
Order from : Hesperian Press, PO Box 317 Victoria Park, 6979 W.Australia.
AUS 40.00 + post

Published in Perth 15th December 2002

* The Greatest Australian Mining Covered Up Swindle Of The 20th Century
http://membres.lycos.fr/jpturcaud/
( Scuttled on Oct 29th 2003 under the Mining Criminals' cheers, and having
reached over 92 MHits )

* The True Geology
http://membres.lycos.fr/jpt
( Was also wound up on Oct 29th 2003 due to plagiarism hazards )

~~Ignorance Is The Cosmic Sin, The One Never Forgiven ! ~~


"RSmith" <kpwhite@roadrunner.nf.net> a écrit dans le message de
news:c5jbt1$ahm$1@nntp-stjh-01-01.rogers.nf.net...
[quote:90341f4d12]Mr.Denke,
Would Mafic and felsic volcanic or volcaniclastic rock be a good place to
find gold?
If so,what size "grains" would one expect to find?
Thanks again for any help you could provide.

Mr.K.White.(AKA: RSmith) .
"RSmith" <kpwhite@roadrunner.nf.net> wrote in message
news:c5gqp4$fve$1@nntp-stjh-01-01.rogers.nf.net...
other than quartz, what type of rock is associated with gold?
Thanks



[/quote:90341f4d12]
 
El Guapo
Posted: Thu Apr 15, 2004 12:42 pm
 
"Sir Jean-Paul Turcaud" <jpturcaud@true-geology.edu> wrote in message
news:407ead90$0$7788$7a628cd7@news.club-internet.fr...
[quote:1d96f2d63c]The funny thing is none of the replies emanate from any people with ANY
finds at their credit !
Incredible how the University brainwashed blokes, are so sure to know the
right story !
... but completely unable to find any mining deposits indeed !

Problems there ! Hey ?

My injunction to any of those guys, at this point in time, would be :

If you are so good at that game, go and find some !

...and this is a clear demonstration for all to see, of that evident
fraud
which is the present Gogology !

PATHETIC !!!!
[/quote:1d96f2d63c]
JPT's right. I bet nobody else here walked right over what would become one
of the biggest gold mines in the world, without once thinking it might have
gold in it! Can't beat that for real world experience.
 
Robert Flory
Posted: Sun Apr 18, 2004 10:38 pm
 
"rick++" <rick303@hotmail.com> wrote in message
news:f7422d8e.0404140728.776fbdf0@posting.google.com...
[quote:5b0cf64d3d]Gold forms in close association with volcanoes or is hosted in
volcanic rocks. Three environments/styles are most common: gold in
greenstone belts, gold in porphyry deposits, and gold in epithermal
deposits.

Good summary of primary gold deposits.
However many of these source rocks are worn into sediments and carried
along riverways. Gold flakes survive the fluvial forces fairly well
and then settle out into sand and mud due to their weight.
Some of the famous California deposits were in primary rocks in the
core Sierras while much was along the Sacramento and other rivers.
The most exciting California gold plays are in fossil rivers
detected by petroleum prospecting methods.
This applies too in the Rockies, southern Africa, etc.
[/quote:5b0cf64d3d]
There are thick deposits of gold bearing sediments in the Teton country of
Wyoming. J.D. Love did a bunch of work on it for the USGS.
In the Harebell Formation, Pinyon Conglomerate if I remember right.

Bob
 
 
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