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PhotosGormanite - Big Fish River, Dawson Mining District, Yukon, Canada

7th Oct 2016 20:59 UTCRichard Gunter Expert

09334920017076871028334.jpg
Gormanite, Kulanite
Big Fish River, Dawson mining district, Yukon, Canada
Copyright © Christophe Boutry
The acicular crystals on the lower right side and far left side of the photograph are Gormanite but the platy greenish phase in the center is Kulanite (sl).

9th Oct 2016 16:42 UTCUwe Kolitsch Manager

Message sent.

10th Oct 2016 00:20 UTCJason Evans

The gormanite might be souzalite.

10th Oct 2016 18:00 UTCRob Woodside 🌟 Manager

That's a problem we need to deal with.

10th Oct 2016 18:39 UTCRichard Gunter Expert

Hi Rob:


If you use the RRUFF data then these are all in the Gormanite-Souzalite paragenesis; that is why I used (sl) for the series. This looks like the Bobdownsite paragenesis. I talked to Kim Tait about the non-Bobdownsite minerals and at that date they had not been analyzed for either Mg/Fe or F.

11th Oct 2016 21:45 UTCChristophe Boutry Expert

Description modified .


Thanks for your help !

11th Oct 2016 22:41 UTCRichard Gunter Expert

That description is much clearer. There is a great deal of data on the RC-BFR minerals including good descriptions of the various sub-localities.

13th Oct 2016 01:37 UTCRob Woodside 🌟 Manager

All unanalyzed Gormanites from the Yukon should be labeled Gormaite-Souzalite series, at least in the caption as you have done. Thanks.
 
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