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gold - Coggle Diagram
gold
properties/intro
reactivity
increases with temp
properties
hard
dense
precipitates as native metal
siderophilic - associated with iron and sulphur (also arsenic, similar structure)
orogenic gold precipitation
hydrothermal vein deposits
gold concentrated in structural veins
hydrothermal disseminated
dispersed and distributed through host rock
causes of precipitation
mixing
boiling
rock wall alteration reaction
hydrothermal fluids react with limestone walls
types of deposit
orogenic (igenous intrusions from mountain building colisions)
placer (enrichment of gold from channel deposits)