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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Feb 09, 2009 23:00 Post subject: Specimen from Cananea, Mexico |
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Hi all,
Knowing there are lots of knowledgeable folks on this forum, I have a specimen I am trying to establish a definite locality. It is reportedly a Rhodochrosite with Pyrite and Quartz. The label also claims Argentite is present, but I don't think so. It appears Sphalerite and maybe Hematite is present.
It is ex J.G. Dixon collection (maybe J.Q. Dixon)
ex. Mareher collection (through Chuck Jordan)
If anyone knows this material, and can help pin it down as far as mineralogy and specific locality, I would greatly appreciate it. Also, if anyone knows anything about the ex collectors, that would be nice too.
Thanks,
Bob
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Specimen from Cananea, Mexico. 21 X 15 cm. |
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8911 Time(s) |
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Specimen from Cananea, Mexico. Pyrites are 2 cm across. |
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8891 Time(s) |
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Closeup of Specimen from Cananea, Mexico. |
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8895 Time(s) |
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Les Presmyk
Joined: 06 Dec 2007
Posts: 372
Location: Gilbert, AZ
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Posted: Feb 10, 2009 08:28 Post subject: Re: Specimen from Cananea, Mexico |
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Definitely from Cananea and it is an old specimen. I, too, would suspect sphalerite or tetrahedrite but not acanthite.
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Feb 10, 2009 08:54 Post subject: Re: Specimen from Cananea, Mexico |
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Hi Les,
Any idea of which mine may have produced it? And, by "old", I presume based on the reference to Chuck Jordan, that it from the 1940s to 1950s?
Bob
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Peter Megaw
Site Admin
Joined: 13 Jan 2007
Posts: 965
Location: Tucson, Arizona
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Posted: Feb 10, 2009 08:55 Post subject: Re: Specimen from Cananea, Mexico |
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I agree with Les, although I have a Cananea rhodo piece with enargite on the matrix as semi-corroded (possibly pseudomorphed) coarsely bladed crystals.
_________________ Siempre Adelante! |
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Les Presmyk
Joined: 06 Dec 2007
Posts: 372
Location: Gilbert, AZ
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Posted: Feb 10, 2009 09:31 Post subject: Re: Specimen from Cananea, Mexico |
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Much older. I know of one collection with these rhodochrosites that date from the early 1900's.
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