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How do lateritic nickel ore deposits form?
How do lateritic nickel ore deposits form?
- From intensive and long-lived tropical weathering of ultramafic rocks (correct)
- From hydrothermal activity
- From volcanic eruption
- From metamorphic rocks
What are the two types of nickel laterite distinguished based on?
What are the two types of nickel laterite distinguished based on?
- Nickel content in the upper part
- Presence of olivine in the rock
- Location within the regolith (correct)
- Color of the soil
How does meteoric water contribute to the formation of lateritic nickel ore deposits?
How does meteoric water contribute to the formation of lateritic nickel ore deposits?
- By causing oxidation of iron minerals
- By creating acidic rain that dissolves nickel
- By direct precipitation of nickel minerals
- By percolating through the soil and redistributing nickel (correct)
What minerals are rapidly decomposed by acidic rain and soil water in the formation of lateritic nickel ore deposits?
What minerals are rapidly decomposed by acidic rain and soil water in the formation of lateritic nickel ore deposits?
Which process results in the immobilization of nickel by ion exchange in lateritic nickel ore deposits?
Which process results in the immobilization of nickel by ion exchange in lateritic nickel ore deposits?
Which region is identified as the largest ore province of Ni-laterites?
Which region is identified as the largest ore province of Ni-laterites?
Which mineral is most commonly associated with iron hydroxides in gossans?
Which mineral is most commonly associated with iron hydroxides in gossans?
What is a characteristic feature of gossans that makes them prominent indicators for hidden sulphide ore?
What is a characteristic feature of gossans that makes them prominent indicators for hidden sulphide ore?
How can geologists distinguish between valuable ore gossans and 'false gossans'?
How can geologists distinguish between valuable ore gossans and 'false gossans'?
In the secondary zonation of a deeply weathered copper sulphide ore deposit, what minerals are typically found below the groundwater table?
In the secondary zonation of a deeply weathered copper sulphide ore deposit, what minerals are typically found below the groundwater table?
What is one of the main reasons gossans are considered prime prospecting guides?
What is one of the main reasons gossans are considered prime prospecting guides?
What type of deposit are gossans mainly considered to be?
What type of deposit are gossans mainly considered to be?
What process causes alumina enrichment in aluminium silicate rocks?
What process causes alumina enrichment in aluminium silicate rocks?
What is the minimum percentage of Al2O3 required for bauxite to be economically exploitable?
What is the minimum percentage of Al2O3 required for bauxite to be economically exploitable?
Which type of bauxite is associated with high level or upland areas?
Which type of bauxite is associated with high level or upland areas?
In which region was the Boddington bauxite mine, one of the largest lateritic gold deposit representatives?
In which region was the Boddington bauxite mine, one of the largest lateritic gold deposit representatives?
What is the characteristic that makes lateritic gold deposits attractive for mining compared to hard rock deposits?
What is the characteristic that makes lateritic gold deposits attractive for mining compared to hard rock deposits?
What limits the importance of lateritic iron ore deposits as a source of iron?
What limits the importance of lateritic iron ore deposits as a source of iron?
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