Ore Formation Flashcards
0
Q
From hydrothermal fluids:
Water at high temps and pressure scavenges metal ions from the
A
Magma and from the metals in the surrounding rocks as it comes into contact with them.
This causes alteration.
1
Q
By separation of magma:
Minerals with high melting temps
A
(olivine/pyroxene) crystallise early from magma.
2
Q
By separation of magma:
Sometimes accompanied by dense, non-silicate minerals, containing
A
Iron chromium and titanium, which sink to the bottom of the magma chamber and form layers of ore when magma solidifies.
3
Q
From hydrothermal fluids:
The hot, aqueous, hydrothermal fluid approaches
A
Earths surface and cools, infiltrating cracks in colder surrounding rocks.
