Lec 5 - Nature Of Ore-Bearing Fluids

Question 1

Ore bearing fluids

Answer 1

• magma/magmatic fluids

* hydrothermal fluids

Question 2

High temp rock melt of liquid and crystals, it produces igneous rocks

Answer 2

Magma

Question 3

Mafic portions of magma

Answer 3

Cr, Ni, Pt, P

Question 4

Silic portions

Answer 4

Sn, Th, Zr

Question 5

Oxide or sulfide dominated magma that solidify directly as ore

Answer 5

Ore magma

Question 6

Partly crystallized magma is subjected to stress, the fluid fraction is squeezed off from the residual crystalline mush

Answer 6

Filter pressing

Question 7

Coexistence between 2 liquids and their separation from each other

Answer 7

Liquid immiscibility

Question 8

Aqueous, high temp fluid solution (100 - 800 C)

Answer 8

Hydrothermal Fluid

Question 9

At critical temp (367 C) water will not boil but will steadily become less dense

Answer 9

Supercritical Fluid

Question 10

Sources of Hydrothermal Fluids

Answer 10

• Connate water
• metamorphic Water
• magmatic water
• meteoric water
• sea water

Question 11

Fluids and volatiles that travel upward from magma

Answer 11

Magmatic/Juvenile Waters

Question 12

Decrease viscosity of magmas, lower freezing points of minerals, make possible devt of minerals that would form in a dry melt

Answer 12

Fluxes