Diversification of magmas

Question 1

What is Magmatic Differentiation?

Answer 1

Any process where a magma can diversify and produce a magma/rock with a different composition

Question 2

Hvilke omdannelser kan intrusioner skabe?

Answer 2

• Skorpe kontaminering: Intrusiuoner kan smelte noget omkringlæggende og omdanne det
  • Fraktionel krystalisation skaber differentiation
  • Magma blanding mlm. to forskellige intrusioner
  • Ved kompaktion komemer magma mlm. krystaller ud i smelten.
  • Den måde flowet af magmaet er på, kan diversificere magmaet
  • Smelteafblanding: Termodynamisk ligevægt mlm. to smelter
  • Volatil transport

Question 3

Gravity settling

Answer 3

Differential motion of crystals and liquid under the influence of gravity, due to difference in density

Question 4

How does Olivine in basalt and Rhyolitic melt flow?

Answer 4

Olivine flows very quickly in magma. Man ville se, i en smelte, at olivinen bliver fanget i toppen, da magmet størkner så hurtigt, hvorefter længere nede, den har en mulighed
for at synke ned

Rhyolitic melt flows very slow (200m in 10.000 years)

Question 5

What is liquid immiscibility? (Smelte afblanding)

Answer 5

Liquid immiscibility is the coexistence of two or more liquid phases in equilibrium.

Blanding af to smelter–> ligevægt v.
samme temperatur.

The theory does not hold up too much

Question 6

What insitu processes can happen to a melt?

Answer 6

Crystals don’t sink or move, this means that they can:
Diffuse, Convect or Compact