Talk:Porphyry copper deposit

I removed the following, prior toa bit more discussion:

''Low-grade but very large "porphyry uranium deposits" have been studied as future resources. The most well-known of this class is the Rossing deposit in Namibia.''

F. C. Armstrong (1974) Uranium resources of the future-"porphyry" uranium deposits, in Formation of Uranium Ore Deposits, Vienna: International Atomic Energy Agency, p.625-635.

As far as I am aware, the Rossing deposit is hosted within an alkaline granitoid, heavily modified by metamorphism, which is not technically in line with most porphyry copper deposits, given a lack of alteration similarities, metal zonation, etc. As far as I recall (being in South Africa, not my usual haunt in australia, and away from my literature) that the uranium resides primarily in phosphates such as apatite, monazite, etcetera. This is again, not really a 'porphyry' style deposit as the type of magma (alkaline silica-undersaturated and highly potassic) is not at all the same.

I am, however, merely ecouraging someoe to come and say why it should be included ere, versus under perhaps its own class, where it currently more or less resides. The search for another Rossing has been long and unfortunetely rather fruitless, meaning, again, anging it on the coathanger of a porphyry deposit is drawing a rather long bow...it is like claiming that the Olymic Dam deposit isn't now an IOCG, it's a porphyry uranium deposit. Rolinator 16:22, 7 April 2007 (UTC)
 * I had put it in based on the cited reference, but if it doesn't belong, then leave it out. Plazak 16:50, 7 April 2007 (UTC)

Oceania please (you have Oceana.) 115.187.228.230 (talk) 00:19, 22 February 2012 (UTC)
 * Fixed, thanks. Vsmith (talk) 02:19, 22 February 2012 (UTC)

Mistake
The phrase "1.7 times 1011 tons of copper" seems to be a mistake. — Preceding unsigned comment added by 86.167.104.60 (talk) 09:37, 22 June 2014 (UTC)
 * Possibly "10^11" is what was meant. — Preceding unsigned comment added by 86.167.104.60 (talk) 09:45, 22 June 2014 (UTC)
 * Changed to 1.7×1011 tons of copper. Vsmith (talk) 13:13, 22 June 2014 (UTC)

Article improvements needed!
First and foremost, we need photos and illustrations of what's going on. I'll put it on my list, but help is welcome! I don't think a newcomer would get much out of the body of the article now. The lede and list of mines are fine.

Second, the cartoon model (from USGS) is blurry and hard to make out. I'll look for something better, and try to get permission to use it. --Pete Tillman (talk) 22:01, 11 January 2017 (UTC)

External links modified (January 2018)
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