Geological Ore Deposits

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Geological Ore Deposits por Mind Map: Geological Ore Deposits

1. Finding ore deposits

2. Economic viability

2.1. Grade (i.e. amount of metal per ton of rock)

2.2. Size of the deposit (i.e. tonnage)

2.3. Easy access to infrastructure such as roads and rail for transportation

2.4. Current price for the commodity

2.5. Demand

3. Oxidised zones of ore deposits

3.1. Copper: malachite, azurite, chrysocolla

3.2. Gangue minerals: quartz (usually cryptocrystalline), baryte, calcite, aragonite

3.3. Iron: goethite, hematite

3.4. Lead: anglesite, cerussite

3.5. Manganese: pyrolusite, romanechite, rhodochrosite

3.6. Nickel: gaspeite, garnierite

3.7. Silver: native silver, chlorargyrite

3.8. Zinc: smithsonite

4. Supergene zone

4.1. Copper: chalcocite, bornite

4.2. Lead: supergene galena

4.3. Nickel: violarite

4.4. Silver: acanthite, native silver

4.5. Zinc: supergene sphalerite, wurtzite

5. Classification and types

5.1. Of importance

5.1.1. Metallic deposits

5.1.2. Non-metallic deposits

5.1.3. Fossil fuel deposits

5.2. Commodity being mined

5.3. Tectonic setting in which the deposit occurs

5.4. Geological setting of the mineral deposit

5.5. Genetic model

5.5.1. Orthomagmatic deposits Chromium Titanium Iron Nickel Copper Platinum-group elements Diamonds

5.5.2. Pneumatolytic and pegmatitic deposits Tin Rare-earth elements Tantalum Beryllium Lithium Molybdenum Tungsten

5.5.3. Hydrothermal deposits Lode gold deposits or archaean gold deposits Epithermal deposits Native gold and silver Electrum Acanthite and tetrahedrite Silica occurring as quartz (most often forming comb-like aggregates), amethyst, opal, chalcedony and cristobalite Replacement deposits in calcareous sequences Base-metal vein deposits Replacement skarn deposits

5.5.4. Volcanic or extrusive deposits

6. Remobilisation of ore deposits

7. Other Types

7.1. Sedimentary iron ore and manganese deposits

7.2. Placer deposits

7.3. Clay deposits

7.4. Evaporite deposits

7.5. Phosphatic deposits

7.6. Residual deposits

8. Organic deposits

8.1. Coal

8.2. Fireclay

8.3. Peat

8.4. Oil/petroleum