Enova Mining - Charting/TA Thead - 3c target then 6.3c, page-1954

Since you hold MEI, the answer is every IAC deposit I have looked at has cerium in the 'head grade'. The extent though varies, since REE deposits are formed differently in any event and each deposit has a different composition (not withstanding some REE deposits have the addition of scandium as well - IXR for one was reporting in its scoping studies on this other element as well and I don't hold that stock either btw).

My post had a reference to this post refer Post #: 65423696 where this table came from which I duplicated as a means to support a post by SFTH a while back when MEI was showing some early results (back in 2023) - as a non-holder. It also provides a clear example of where true value in a basket price lies.


I don't hold this stock any longer but in this post Post #: 49737093 I was going through a process of understanding where cerium is removed in the process - seems to be removed at the extraction plant before it goes to the (remaining) REE separation plant where you get your true payable REE minerals.

Anyway, if you have an alternate view happy to understand it as rare earths is not something I know too much about.

All IMO

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Future reference - taken from something I posted in another stock where in that stock they used ammonium sulphate (but added small amounts of another lixivant) recovery rates were higher than using ammonium sulphate alone (i.e goes to my initial comment that not all resources within an IAC system are ionic. By way of background, from this link for those interested in METs for IAC and clay deposits, but for yourselves read last sentence on the extract below(PDF) Recovery of rare earth elements adsorbed on clay minerals: II. Leaching with ammonium sulfate (researchgate.net)



(NH4)2SO4 is ammonium sulphate btw.

Now, for anyone really interested this next article is also interesting, but the extract below again gives the gist:
https://www.researchgate.net/publication/257130933_Recovery_of_rare_earth_elements_adsorbed_on_clay_minerals_II_Leaching_with_ammonium_sulfate


While the above are research papers, it would appear that ammonium sulphate is a key lixiviant for use . Anyway, it would also seem that using ammonium sulphate with, ineffect, another base type of lixiviant - been sulphuric acid alone - in this case increases recovery of the higher valued REEs above that of just using ammonium sulphate alone. So will be interesting where in the process this is done and how, but it obviously works to increase recovery, hence the importance of METs. In part my interest is that in itself ammonium sulphate itself is linked to sulphuric acid - https://pubchem.ncbi.nlm.nih.gov/compound/Ammonium-sulfate - so will be interesting the combinations used in the METs themselves when you have samples not truly comfortable with a pH4 value.

For those seeking to understand the term lixiviant, start with wikipedia
https://en.wikipedia.org/wiki/Lixiviant

All IMO