20: Geological Resources (Exercises)
- Page ID
- 2060
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
[SE after USGS at: http://walrus.wr.usgs.gov/infobank/p...ion/seis.html]