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ORE-LECTURE 3 - Coggle Diagram
ORE-LECTURE 3
Liquid immiscibility
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2 immmiscibility: silicate-oxide, silicate-sulphide
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Billbord analogue: grading between mercury and glass marbles. same effect fro sulphate droplets and silicate crystals
2 mafic intrusions: layered, komatiite
Layered: Cr, PGE, single enrched layer, small amount of sulphide is exsolved and enriched
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Partial melting
'Fertile' melt, melt w/ enough elements to form deposit. Melt: more mobile elements
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Different proportions of melt, temperatures and amounts of H2O are key role in elements distribution
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Skaegaard (Greenland) Au and PGE deposit form after lots of fractional crystallisation. Sulfur saturation and precipitation results in Au PGE as layers
REE
Carbonatites in continental rift zone, enriched in incompatible elemenst (REE)
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