Ann: Excellent Metallurgical Results for Mt Alexander, page-44

Hi 2011doogs88,


The most likely source of the PGEs is a mantle plume, a very complex process takes place and can be very hit or miss when it comes to PGEs, in our case at the Cathedrals Belt everything came together which might give us a very valuable resource.

See below,

Magmatic Deposits
PGEs are transferred from Earth’s mantle to its crust by magnesium-rich magmas that were formed by the melting of a high percentage of mantle material from which magma had not been previously extracted. A high degree of partial melting is needed to release PGEs into the melt from the small quanti-ties of sulfide minerals or alloys that are present in the mantle. Upon emplacement in the crust, the magnesium-rich magmas cool to form mafic and ultramafic igneous rocks.Magmatic deposits are concentrations of metallic oxide or sulfide minerals that formed during the cooling and crystallization of magma. Textural and experimental evidence indicate that PGE-enriched mineralization forms when mafic to ultramafic magma becomes saturated with sulfur and an immiscible sulfide liquid exsolves from the silicate magma (Barnes and others, 2008; Holwell and McDonald, 2010; Naldrett, 2010a).

The full story may be read here for those interested,

https://pubs.usgs.gov/pp/1802/n/pp1802n.pdf

all the best


FireflyOne