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Lavra Jabuti Wodginite 2 Different Paragenesis?

Posted by Rudy Bolona  
Lavra Jabuti Wodginite 2 Different Paragenesis?
February 23, 2012 01:03AM
I recently obtained this specimen of wodginite from the Jabuti Mine, Baixio, Minas Gerais, Brazil. It was described as epitaxial after cassiterite. Upon examination it is obviously primary wodginite with no cassiterite. The famous epitaxial find of the 1970's came from a clay filled pocket and all the crystals were without matrix and of course associated with the cassiterite. This specimen has a bit of clean white albite attached. My question is are there two different wodginites from this mine?

Rudy
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avatar Re: Lavra Jabuti Wodginite 2 Different Paragenesis?
February 23, 2012 01:56AM
    
Rudy,

It was my understanding that all the Wodginites from this occurrence are epitaxys. However, I just looked back over Minrec vol. 9 no. 1 p.14-18, and now I'm not so sure with your specimen, or with my specimen, both of which came from the same lot. Perhaps they are primary crystals. I'll be curious as to other's thoughts.

© C. Stefano '10
avatar Re: Lavra Jabuti Wodginite 2 Different Paragenesis?
February 23, 2012 02:01AM
    
Rudy,

Just thought of something else- both of these specimens came from Schlichter. Check your data card, but I'm pretty sure he noted that he got these labeled with a different locality and changed the label to Jabuti based on the Minrec article. I wonder if he wasn't mistaken
Re: Lavra Jabuti Wodginite 2 Different Paragenesis?
February 23, 2012 03:07AM
Hi Chris,

The Schlicter card says Corrego do Urucum, but says to look at the back which notes Mineralogical record and Smithsonian. He obtained the specimen from Carlos Barbosa with only a thumbnail label saying Galileia. Wodginite is not listed at the Corrego do Urucum, maybe it's from Linopolis. Unfortunately, both of these great collectors are in that great pegmatite in the sky. Anyhow the specimen is awesome and I love it!

Rudy
avatar Re: Lavra Jabuti Wodginite 2 Different Paragenesis?
February 23, 2012 10:07AM
I don't know if this helps but anyway from Min.Rec vol 21 p.488:
"Lastly, Carlos Barbosa has obtained more interesting specimens from Linopolis, in Minas Gerais. Among these are wodginite in lustrous black crystals up to 1 cm"

also
Ercit et al in Can Min. 1992, p. 614 lists, apart from Lavra Jabuti, also Alto do Giz and Seridozinho, Parabaiba as Brazilian wodginite localities.

Van King might be of further help, and for sure Luiz Menezes

cheers
Re: Lavra Jabuti Wodginite 2 Different Paragenesis?
February 25, 2012 03:03AM
I don't think any of your specimens came from Jaboti mine; Carlos Barbosa had on his old inventory, that I acquired from his widow Lourdes in 2005, a very similar specimen labelled as from Linópolis. I have not heard about wodginites from Urucum mine (I prefer this name rather than "Córrego do Urucum").
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