Gold Ores

[Istang]

Where are gold ores usually common. In the water, on the bank, etc... And I still haven't learn how to scout out a good place to mine. Any advice?

 

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[Oakview2]

It would be helpful if folks at least new what state you are in A good spot would be to go where gold has been found previously..... The old timers did not get it all.....

 

[TerryC]

Oakview2 has a point. Can you further define your question? Are you really asking "Where to find gold placers"? Gold ores are many. They are usually above the water in the form of outcrops, dykes, and veins. As these erode, the gold is released downhill, possibly into water. As Oak said, go to where it has been found before. Always the best advice for new prospectors. Here are pics of my latest addition to my growing library...

TTC

 

[Istang]

TerryC : u answered my question very good... I wasn't wanting to know where to go find them... I was just asking where they are usually found....thanks

 

[Oakview2]

This will be my next purchase...The Tertiary gravels of the Sierra Nevada of California - Waldemar Lindgren, Frank Hall Knowlton - Google Books

Hope you are finding plenty of color. Good health and good hunting...

 

[TerryC]

This will be my next purchase...The Tertiary gravels of the Sierra Nevada of California - Waldemar Lindgren, Frank Hall Knowlton - Google Books

Hope you are finding plenty of color. Good health and good hunting...

Good deal, Istang! Tnx. Oak, Lindgren is one of many authors featured in this textbook. 676 pages of PURE GOLD. This book is not a "how to" but a why and when type of publication. TTC

 

[Fullpan]

Oakview2

After reading "Tertiary Gravels" you will have a vast improvement in understanding where the gold comes from in the Northern Mother Lode. - Fascinating
read!

 

[dave wiseman]

The Tertiary gravels of the Sierra Nevada of California - Waldemar Lindgren, Frank Hall Knowlton - Google Books try this link.

 

[UncleMatt]

Here is a question: can gold ore with free gold in it be detected with a metal detector? For example, if you were looking for a seam or fissure of gold ore, and the ore had particles of free gold in its matrix, would that ore be detectable by off the shelf detectors? And to be clear, I am not referring to a telluride ore.

 

[UncleMatt]

Hmm, maybe no one has ever tried this here. I would think the answer would be yes, assuming the detector in question is able to give a signal over fairly fine gold.

 

[Terry Soloman]

Here is a question: can gold ore with free gold in it be detected with a metal detector? For example, if you were looking for a seam or fissure of gold ore, and the ore had particles of free gold in its matrix, would that ore be detectable by off the shelf detectors? And to be clear, I am not referring to a telluride ore.

Not likely. Micro-gold in gold rich ore will not set off a metal detector. Flakes weighing .03-grams or more will read on several VLF machines like the GMT; Goldbug II; Lobo Super Trac

 

[UncleMatt]

Thanks, Terry, I was beginning to think I chased everyone off.

So you don't think a pulse induction detector like a minelab or an infinium would detect small particles of gold in an ore matrix? I guess we would need to define just what particle size we are discussing, but I would hope they would. Have you ever detected native ore like this with any kind of detector in the field? If so, please share your experiences.

 

[Terry Soloman]

Thanks, Terry, I was beginning to think I chased everyone off.

So you don't think a pulse induction detector like a minelab or an infinium would detect small particles of gold in an ore matrix? I guess we would need to define just what particle size we are discussing, but I would hope they would. Have you ever detected native ore like this with any kind of detector in the field? If so, please share your experiences.

Nope, even my Minelab GPX 5000 will not detect minute gold in ore. This is very rich ore from the Weaver Mountains. While you may get a hit on the magnatite, you won't hear the gold even though there is probably more than two grams locked up inside this specimen. The machine doesn't see the individual grains because they are too small. The same thing happens with fine gold chains. The detector only see's individual links, not the whole chain, unless it is balled up tight. When folks hit gold chains, the machine usually sees the clasp.

 

[UncleMatt]

I really appreciate your insight and experience on this. I was hoping my infinium would help me locate seems of ore with free gold in it in the San Juans. I already knew tellurides would not give a signal, since the gold is chemically altered in tellurides.

 

[Terry Soloman]

I really appreciate your insight and experience on this. I was hoping my infinium would help me locate seems of ore with free gold in it in the San Juans. I already knew tellurides would not give a signal, since the gold is chemically altered in tellurides.

The Infinium is not a good nuggetshooter to begin with. It can find medium nuggets (0.8-grams) up to 4" deep, but will walk over a half-gram picker at the same depth. Even the GPX 4000 used to walk over some smaller pieces with a DD coil, but the GPX 5000 can hear some really small stuff (.2-grams) with the right super fine settings. Many times you can pick up a seam with a detector because of the host rock, just depends.

 

[TerryC]

I own a Gold Bug 2. It will (as I have posted before) sound off on a .04 gram of gold buried 2 inches deep. Later today I will have a Falcon MD20. I'll test and report on its ability to sound off on small gold. TTC

 

[TerryC]

Nope, even my Minelab GPX 5000 will not detect minute gold in ore. This is very rich ore from the Weaver Mountains. While you may get a hit on the magnatite, you won't hear the gold even though there is probably more than two grams locked up inside this specimen. The machine doesn't see the individual grains because they are too small. The same thing happens with fine gold chains. The detector only see's individual links, not the whole chain, unless it is balled up tight. When folks hit gold chains, the machine usually sees the clasp.

Nice rock, Terry. Have you checked the specific Gravity to try to determine the possible amount of gold? There is much magnetite/quartz rock NW of Rich Hill, near Mina Rd that will drive you nuts.... unless you know of the magnetite! Take care, my friend. TTC

 

[Terry Soloman]

This is SUB GRAIN, and just posted on another gold forum I belong to. It was found with a Minelab GPX 5000 at 4".

 

[Terry Soloman]

Nice rock, Terry. Have you checked the specific Gravity to try to determine the possible amount of gold? There is much magnetite/quartz rock NW of Rich Hill, near Mina Rd that will drive you nuts.... unless you know of the magnetite! Take care, my friend. TTC

No Terry, not that one, but similar ones. That specimen came off the top of Rich Hill.

 

[TerryC]

Ah, the top of Rich Hill..... One day, God. Just ONE DAY on the top of Rich Hill, PLEASE! TTC