Types of Magmatic Ore Deposits

Question 1

Five processes of ore formation distinguished in magmatic systems:

Answer 1

1. Partial Melting: Low degrees of partial melting concentrate ore elements.
2. Magma Chamber Accumulation: Ore minerals concentrate as magmas crystallize.
3. Immiscible Melts Separation: Two distinct melts separate in magma.
4. Fractionation: Extreme crystallization leads to ore concentration.
5. Mineral Incorporation: Minerals form at specific depths within the Earth.

Question 2

Classification and Description of Important Philippine Chromite Deposits

Answer 2

1. Primary Podiform Deposits
2. Residual/Transported Deposits