Core Flashcards
1
Q
What meteoritic composition does the core resemble?
A
Carbonaceous chondrite, 10% Fe & Ni
2
Q
How did the Fe/Ni alloy sink?
A
Sulphur flux decreased melting point and accumulated at centre to for Fe/Ni core
3
Q
What does the Fe/Ni core cause at the outer perimeters?
A
Fe Ni depletion as well as Pt Au as metallic phases fall to centre
4
Q
How much Ni is found in the core?
A
20%
5
Q
When was the core former?
A
30million years after accretion, evidence from molten metallic outer core convection forming a magnetic field
