Research Notes on GPP Guyana Morabisi Project, Coal to Liquids Project & SOP projects, page-2

Post #:19818371 on Oct.13

The greenstone belts of Guiana shield of South America (GPP's Morabisi project location) and Birimian shield of West Africa (BGS's Bougouni Project location) were once at the same geographic area, hence they both have the same geological settings.

I wanted to add another important point to the research notes. I am also seeking for the help of geo guys as I am not a geo. I am making this research for myself and sharing with you guys. I am expecting the critics of pro guys in deed.

@blastfurnace, I can see you gave me a thumbs up to my first post which means you are aware of GPP's project. I thank you for your TU. You are one my favorite posters because you credibility in lithium stocks is proven and I follow you. I would, I think everyone here would, appreciate if you can give us your opinions on this project. Thanks in advance.

As some of you may aware, BGS.ASX - Birimian Gold has proven a very high grade lithium deposit Goulamina of prospect in Southern Mali. The deposit is still open in length and depth. It has very high Li2O (2.00%) head grade. This is the highest after Talison Lithium (Greenbushes) (2.80%) in ASX listed companies. (Consider that Pilbara Mineral's grade is 1.26%).

And, most importantly BGS's product grade is even higher than anyone in Australia, it's 6.70% while Talison's is 6.00%.

Here is the table for comparison. Thanks and credits to @aneeso and @Ubique13 for this table.



Why I am saying this?

Because South America and Africa once joined together then started to separate 120m years ago, the greenstone belts of Guiana shield of South America and Birimian shield of West Africa is continuation of same greenstone belts.

The greenstone belts of Guiana shield of South America and Birimian shield of West Africa were once at the same geographic area and still have the same geological settings.





However the evolution of this geology started 2.5 billion years ago in Archean era, long before than 120m years ago.

LCT (Lithium-Cesium-Tantalum) pegmatites are not very common but they are typically hosted within Archean greenstones. Pilbara and Greenbushes LCT pegmatites are very good examples of this geological setting. And most of the LCT pegmatite deposits of the world are on or around the archean greenstone belts.

You can see from the map below that the Guiana shield (where Guyana is located) is an Archean shield (of craton) but no discovery of LCT pegmatites has been made so far.


The maps below show the reconstruction of Guiana shield of South America and Birimian shield of West Africa.



Also there is very interesting similarity with BGS's Goulamina of prospect and GPP's Morabisi project; they are both younger granitoids batholith structures surrounded with greenstone belt sequence and LCT pegmatites.

(You need to have good look at the maps to see what I mean)

BGS;



GPP;





Post #:20403326
LCT pegmatite rocks

Here is some technical info for us to understand how the hard rock lithium deposits are evolved. (lithum brines are different). I will explain it in a very simple way.

Lithium is found in LCT pegmatite rocks.

Pegmatite rocks are not horizontal like the sedimentary deposits (coal, potash, etc,) go for kms under the ground, instead LCT pegmatites are the melts going upward (by an angle) to the surface from the magma through the fractures and fault lines. (magmatic dikes cross-cutting horizontal layers of sedimentary rock)

Here is a picture of pegmatite rock in large scale.



And here are a few pegmatite rock dyke images in close view






Pegmatite rocks may be seen as outcrops (dykes) or they may be hidden under the ground.



Here is the cross diagram of Pilbara Mineral deposit showing outsropped and not outcropped pegmatite dykes in the prospect.



And here is the view of PLS - Pilbara Minerals LCT pegmatite outcrops on their deposit area.




Pegmatite rocks has two types;

LCT - Lithium, Cesium, and Tantalum enrichment
NYF - Niobium, Yttrium, and Fluorine enrichment

LCT pegmatites represent the most highly differentiated and last to crystallize components of certain granitic melts. LCT pegmatites are enriched in the incompatible elements lithium, cesium, tin, rubidium, and tantalum, and are distinguished from other rare-element pegmatites by this diagnostic suite of elements.

Because LCT pegmatites are the melts going upward (by an angle) to the surface from the magma through the fractures and fault lines, LCT pegmatites can form thin dikes and outcrops.

They are the sheet like structures. See the PLS - Pilbara Minerals 3D image for their deposits below.



Idealised LCT pegmatite systems

You can see the idealised LCT pegmatite system schema below. This schema is very important to understand where to look for lithium deposits.

You can see that lithium can be find most at the top of LCT pegmatite dyke system (it is the lightest metal elements) together with other rare earth elements like tantalum (Ta), cesium (Cs), beryllium (Be), tin (Sn) and niobium (Nb).

Also this schema tells that where there is a lots of tantalum you can look for lithium there as I said on first my research post and yesterday's post as well.

If there is a lots of beryllium and niobium and little tantalum then there is no chance of much lithium.