CompuServe Thread

Platinum In Arizona?

15 messages in this thread
#122238From: Bruce RobbinsFeb 25, 1994 7:28 PM
Hi, I was wondering if anyone out there knows more about this Pt play in Arizona. Apparently, a company named Global Platinum and Gold has got 62 million tons of: 0.205 oz/t Au 0.864 oz/t Pt 0.128 oz/t Pd 24.23 oz/t Os 13.65 oz/t Ir 1.12 oz/t Ag on their Oro Grande Mine property near Wickenburg, Arizona. I found these numbers to be a little too high for my liking. Anyways, any info on the geology etc. would be greatly appreciated, Bruce
#122258From: Todd FrankFeb 25, 1994 10:11 PM
Where at in AZ? I worked for AMAX Exploration in Tucson for a spell, is the mine any where near there?
#122300From: Bruce RobbinsFeb 26, 1994 11:36 AM
Hi Todd, According to what I have the property is at the Oro Grande mine near Wickenburg, Arizona. I live in Quebec, Canada, and have never been to Arizona, so I haven't a clue as to what city that is near. Bruce
#122330From: Doug MitchellFeb 26, 1994 4:48 PM
Hi, Bruce– Those numbers are surprising to me, with osmium and iridium concentrations greatly exceeding platinum and palladium. The Encyclopedia of Minerals lists "osmium" as occurring in only one district in Russia, though I expect to find lesser amounts wherever platinum is. I see in my atlas that Wickenburg is NW of Phoenix, ~~50miles or so. I may not know the geology, but I know there are fluorescent willemite and eucryptite from a mine in that area, so a zinc orebody and a lithium-bearing pegmatite are near at hand. Fluorescent wickenburgite from the "Rat Tail Claims" might be from that area (is that too obvious a guess to be true?), indicating lead, no surprise where zinc is found. But the platinum, gold, etc. I would think to be a placer deposit. I wonder how easy to extract those platinum metals would be. Does the "heap leaching" process used for gold work for platinum group members also, perhaps with some modification? –Doug
#122338From: Bruce RobbinsFeb 26, 1994 5:52 PM
Hi Doug, Thanks alot for the response. I don't really believe the numbers myself. So far 12 out of 12 geologists don't believe them either. I'm just following up on a rumor that I heard. I would imagine that the deposit is placer too, although I'm basing this just on these results. I don't think you can heap leach Pt; it doesn't have the same affinity for cyanide that gold has. It would be easy to concentrate the heavies, but difficult to split the gold from the Pt. Apparently this company has come up with a secret process. Thanks again! Bruce
#122376From: Lanny R. ReamFeb 26, 1994 10:12 PM
Does anyone know of a "secret process" related to mining that wasn't also related to a stock offer/promotion? Lanny
#122417From: Bruce RobbinsFeb 27, 1994 11:58 AM
Hi Lanny, I agree 100%. I want to expose this sham for what it is. It's the numbers that get to me. Almost 8:1 Pt to Pd. I say impossible. But, since I am not in Arizona, and will not get the opportunity to go, I need someone who knows about this area (an "expert") to confirm it. That way I can calmly confront the people hyping this Bull****. Bruce
#122442From: Lanny R. ReamFeb 27, 1994 3:33 PM
There are a lot of mineral collectors in Arizona who are also mineral exploration geologist. I shall make a few inquiries and see if any I know have heard of this platinum deal. No promises, but if so, I pass word on to you. Lanny
#122450From: Bruce RobbinsFeb 27, 1994 6:10 PM
Hi Lanny, Thanks alot! I'll probably be offline for a couple of weeks, so no preassure.<g> Bruce
#122454From: Doug MitchellFeb 27, 1994 6:46 PM
Hi, Bruce– It occurs to me that if I wanted to come up with a swindle, I would have a ore sample from somewhere else analyzed and report those numbers (and maybe salt the mine with such samples), or crib the numbers from some report from another mine – either way I would not come up with such weird numbers unless I happened to grab a sample from that northern Urals area. They seem _almost_ too weird to be anything but honest. If it is a scam, the perpetrators are either clumsy or think many people will figure as I just did. The need for a "secret process" is the real joker here. If gravity separation were always economical, there would be little heap leaching of gold; I do not know how close those concentrations were to the limit where gravity separation makes sense (the price of osmium and iridium would be critical in this case, with those numbers). Then there is the problem of isolating Pt from Au and whatnot (if cyanide works for Au and not Pt, why not use it here?). I wonder how profitable this proposition would be if the secret process had to be replaced with traditional practice? –Doug
#122492From: Tom Genereaux/DDJFeb 27, 1994 11:51 PM
It's been a number of years since I lived in the area, but I used to do some exploration around Wickenberg. The numbers sound off, to me, too. There are known low-grade platinum ores in the vicinity, but the one commercial mine to exploit the stuff played out years ago.
#122611From: Doug MitchellFeb 28, 1994 10:23 PM
Hi, Tom– Welcome to the forum! The presence of noticeable platinum in the area lends a little more credibility to the claims. It would a strange con that uses such squirrelly numbers yet is smart enough to choose a known platinum mining area. –Doug
#122778From: Bruce RobbinsMar 1, 1994 7:59 PM
Hi Tom, Thanks for the response. I'm ticked off about this co. because they're obviously trying to net some widows and orphans on this info. Genereaux sounds French. Are you French? I'm living in Quebec, that's why I'm asking.. Bruce
#122916From: Tom Genereaux/DDJMar 2, 1994 7:05 PM
Yea, I think that they are a scam. I'm 1/2 French – my family has been trickling into the States from France and Quebec for the last 6 generations.
#122496From: Stephen RylandFeb 28, 1994 1:04 AM
Bruce- Yes, those numbers are probably too good to be true. Talk to the people at the AZ Bur Mines and Geology in Tucson. This type of stuff come through all the time. It is their position that there are no primary deposits of PGM in AZ although I think this is a little too harsh. There have been rumors for years that many of the big Cu companies are secretly accumulating lots of PGM as byproducts. It turns out that some have a little for catalysts but that's about all. One should always keep an open mind but get your own samples and assays-PGM assays are not trivial. Sometimes, some people are not trying to be dishonest but just get caught up in some exaggerated expectations, augmented by "assayers" or should we say "half-ass-ayers". The secret process should give it away as a flaw in logic. They will then probably say that normal assaying methods for PGM will not work. Back in the big promo days in NV in the late 70s early 80s we offered a "truth squad" service to check on such claims-they are not so common now as then. Again, though, strange things sometimes happen, but proceed very very cautiously. If you need some reliable assayers for PGM let me know. Steve