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Geology LibreTexts

20: Geological Resources (Exercises)

Q20.1 Where does it come from?

Responses will vary

Q20.2 The importance of heat and heat engines

Deposit Type Is Heat a Factor? If So, What Is the Role of the Heat?
Magmatic Yes Heat is necessary for melting of the rock to produce magma
Volcanogenic massive sulphide Yes Heat is necessary for melting of the rock to produce magma
Porphyry Yes Heat contained within the porphyritic intrusion drives the convection system
Banded iron formation No Iron is deposited from cold ocean water
Unconformity-type uranium Probably Uranium solubility is enhanced at higher water temperatures

Q20.3 Sources of important lighter metals

Element Silicon Calcium Sodium Potassium Magnesium
Source(s) quartz sand lime-stone halite (NaCl) sylvite (KCl) dolomite ((Ca,Mg)CO3), magnesite (MgCO3), salt lakes and the ocean

Q20.4 Interpreting a seismic profile