[Rockhounds] Fossil Fish and Rare Earths Deposits

[linda at middleearthminerals.com]

Paul, while checking out one of your underclay articles below, I came across
a link to another article that I just can't resist sharing:
"Researchers find salmon semen can be used to extract rare earth elements
from waste"
https://phys.org/news/2015-01-salmon-semen-rare-earth-elements.html
It turns out that the salmon semen (called "milt") has phosphates that
enable it to extract the REEs, especially some of the super-rare REEs like
thulium and lutetium.
And I found the articles about underclay (in your email below) to be
fascinating.  Apparently the coal itself can also hold REEs, especially the
upper surface of the coal seam.  I'm guessing the properties that make
carbon a good water filtering agent are also the reasons it can host REEs?
Thank you for sparking this topic with your email about the REE deposits!
Linda

-----Original Message-----
From: Rockhounds <rockhounds-bounces at rockhounds.drizzle.com> On Behalf Of
Paul
Sent: Tuesday, June 23, 2020 6:54 PM
To: Rockhound List <rockhounds at rockhounds.drizzle.com>
Subject: Re: [Rockhounds] Fossil Fish and Rare Earths Deposits

In addition to waste phospho-gypsum / phosphogypsum the processing of
Florida Phosphate Rock, people are looking at recovering rare earths
elements from underclays, ancient paleosols, that underlie coal seams.

Go see:

Plechacek, A., Montross, S.N. and Verba, C.A., 2018.
The search for rare earths elements and critical metals in underclay
deposits (No. NETL-PUB-21991). NETL.
https://www.osti.gov/servlets/purl/1530836

Plechacek, A., Montross, S.N. and Verba, C.A., 2018.
Petrophysical properties of underclay deposits associated with the
Pittsburgh and Brookville coal seams (No. NETL-PUB-21987). NETL.
https://www.osti.gov/servlets/purl/1530836

Yang, J., Montross, S., Britton, J., Stuckman, M., Lopano, C. and Verba, C.,
2020. Microanalytical Approaches to Characterizing REE in Appalachian Basin
Underclays. Minerals, 10(6), no.546.
https://www.mdpi.com/2075-163X/10/6/546
https://www.mdpi.com/2075-163X/10/6/546/pdf

Birk, D. and White, J.C., 1991. Rare earth elements in bituminous coals and
underclays of the Sydney Basin, Nova Scotia: Element sites, distribution,
mineralogy. International Journal of Coal Geology, 19(1-4), pp.219-251.

Seatearth - underclay
https://en.wikipedia.org/wiki/Seatearth

Yours,

Paul H.
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