[Rockhounds] Fossil Fish and Rare Earth Deposits

linda at middleearthminerals.com linda at middleearthminerals.com
Mon Jun 22 11:48:27 PDT 2020 

So Andrew, how would you explain the phosphate ion/apatite molecule's
ability to gobble up other atoms?  Does it have just the right spacing in
its lattice or a certain flexibility in its bonds or what?

For example, I find it fascinating that water's polarity allows it to
dissolve many substances.

I have just enough chemistry in my head to get me into trouble!

 

 

From: Andrew Turner <turnea55 at hotmail.com> 
Sent: Monday, June 22, 2020 11:23 AM
To: linda at middleearthminerals.com; rockhounds at rockhounds.drizzle.com;
pmodreski at aol.com
Subject: Re: [Rockhounds] Fossil Fish and Rare Earth Deposits

 

Pete,

 

You stole my thunder with your comment...exactly right.  I conducted my
Master's thesis on using apatite to contain radionuclides (plutonium,
americium, cesium, etc.) from spent nuclear fuel at the Yucca Mountain site.
Phosphates are great at incorporating numerous elements into their
structure.  Uranium phosphates are especially good at this.

 

Andrew Turner, PG

 

  _____  

From: Rockhounds <rockhounds-bounces at rockhounds.drizzle.com
<mailto:rockhounds-bounces at rockhounds.drizzle.com> > on behalf of
pmodreski at aol.com <mailto:pmodreski at aol.com>  <pmodreski at aol.com
<mailto:pmodreski at aol.com> >
Sent: Monday, June 22, 2020 10:58 AM
To: linda at middleearthminerals.com <mailto:linda at middleearthminerals.com>
<linda at middleearthminerals.com <mailto:linda at middleearthminerals.com> >;
rockhounds at rockhounds.drizzle.com <mailto:rockhounds at rockhounds.drizzle.com>
<rockhounds at rockhounds.drizzle.com
<mailto:rockhounds at rockhounds.drizzle.com> >
Subject: Re: [Rockhounds] Fossil Fish and Rare Earth Deposits 

 

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
<mailto: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
<mailto: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
<mailto: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://eur05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fphys.org%2
Fnews%2F2020-06-fossilized-fish-rich-deposits-valuable.html
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Fish fossils become buried treasure. Fossilized fish could indicate rich
deposits of valuable rare-earth metals by University of Tokyo, June 18.
2020
https://eur05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.eureka
lert.org%2Fpub_releases%2F2020-06%2Fuot-ffb061720.php
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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://eur05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.nature
.com%2Farticles%2Fs41598-020-66835-8
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Yours,

Paul H.


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