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Techniques for CollectorsDiscussion about Paragenesis
29th May 2013 20:16 UTCVandall Thomas King Manager
29th May 2013 21:44 UTCRichard Gunter Expert
That looks like a very good article and will help a great deal in sorting these samples out. One question I had was with my sample of an Axinite-Mn vein where there is Hancockite at the border between the Axinite-Mn and the Franklinite ore. As you can see the boundary of the Axinite-Mn vein is not sharp but gradational and very irregular. The Franklinite associated with this vein is also mantled by Andradite. Is this type of paragenesis common at Franklin?
Richard Gunter
29th May 2013 23:31 UTCVandall Thomas King Manager
30th May 2013 00:04 UTCRichard Gunter Expert
I look forward to seeing your pictures. I do not see anything in the sample that would resemble Atacamite but some of the non-fluorescent phases in the cavities look like Cahnite. In this sample the matrix contains orange fluorescing Clinohedrite and there are several groups of more or less altered Hendricksite. The Hancockite does not form euhedral crystals in this sample, as it seems to be too early in the paragenesis. My samples from the Charlesite paragenesis contain both euhedral Hancockite and the pseudo-hexagonal Ganophyllite you mention. I think it is also a replacement paragenesis.
Richard Gunter
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Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: March 28, 2024 14:04:32