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14 Cards in this Set
- Front
- Back
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Residual ore deposits are formed by what processes? |
Surface |
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Residual deposits are a source of what? |
Bauxite |
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What is the concentrating process for Bauxite? |
Chemical weathering |
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After chemical weathering the residue may be sufficient to form what? |
Economic deposit |
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What the 3 requirements for a Bauxite deposit to form? |
Tropical climate Granite Acidic groundwater |
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Why is a hot humid climate necessary? |
Intense chemical weathering |
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Why is acidic groundwater necessary? |
Dissolves silica |
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When silica is dissolved what is formed? |
Latterite |
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What is a laterite made of? |
Iron Hydroxides |
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Why is weathering more intense in tropical climates? |
Speeds up weathering Water acts as a catalyst |
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What type of rocks does bauxite develop in? |
Fe poor rocks |
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Name 2 examples of rocks that form bauxite deposits? |
Granite Impure limestone |
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What does the presence of joints speed up? |
Chemical weathering |
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How does the presence of joints speed up chemical weathering? |
Increases surface area |
