[Rockhounds] Fossil Fish and Rare Earth Deposits

[pmodreski at aol.com]

Linda, I haven't read the whole article, but...
the phosphate is in the form of the mineral apatite, and apatite is simply a good host mineral that readily incorporates significant amounts of rare earth elements.  So if apatite is accumulating, it will accumulate rare earth elements along with it.
Pete


-----Original Message-----
To: 'Rockhounds at drizzle.com: A mailing list for rock and gem collectors' <rockhounds at rockhounds.drizzle.com>
Sent: Mon, Jun 22, 2020 11:14 am
Subject: Re: [Rockhounds] Fossil Fish and Rare Earth Deposits

I found this article very interesting.  But I am confused as to why the REY
elements (rare earths and yttrium) are found with the fish fossils.
Phosphorus being concentrated in deposits of previously living organisms,
yes, that makes sense since phosphorus is essential to life.  But REY
elements?  I did see this quote " The global change of the Cenozoic climate
also facilitated the incorporation of phosphorus-favoured elements such as
REY into pelagic clay."
So is it saying that phosphorus preferentially binds with REY elements?  I
wonder why that would be.  There appear to be plenty of oxides and silicates
made with REY and not containing P.  I'm missing a piece of the puzzle here!
Can anyone explain that?


-----Original Message-----
From: Rockhounds <rockhounds-bounces at rockhounds.drizzle.com> On Behalf Of
Paul
Sent: Sunday, June 21, 2020 8:25 PM
To: Rockhound List <rockhounds at rockhounds.drizzle.com>
Subject: [Rockhounds] Fossil Fish and Rare Earth Deposits

Fossilized fish could indicate rich deposits of valuable rare-earth metals
by University of Tokyo PhysOrg, June 18. 2020
https://phys.org/news/2020-06-fossilized-fish-rich-deposits-valuable.html

Fish fossils become buried treasure. Fossilized fish could indicate rich
deposits of valuable rare-earth metals by University of Tokyo, June 18.
2020 https://www.eurekalert.org/pub_releases/2020-06/uot-ffb061720.php

The paper is:

Junichiro Ohta, Kazutaka Yasukawa, Tatsuo Nozaki, Yutaro Takaya, Kazuhide
Mimura, Koichiro Fujinaga, Kentaro Nakamura, Yoichi Usui, Jun-Ichi Kimura,
Qing Chang, and Yasuhiro Kato. Fish proliferation and rare-earth
deposition by topographically induced upwelling at the late Eocene cooling
event. Scientific Reports.
https://www.nature.com/articles/s41598-020-66835-8

Yours,

Paul H.


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