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Mining & Exploration Geology > Mining Geology > Flashcards

Mining Geology Flashcards

1
Q

A type of rock that contains minerals with important elements including metals that can be extracted from the rock at a profit

A

Ore

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2
Q

commercially worthless material that surrounds, or is closely mixed with, a wanted mineral in an ore deposit.

A

Gangue

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3
Q

Ore accumulation. Parts of the crust, where ores are concentrated

A

Ore deposits

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4
Q

the study of the genesis of mineral deposits, with emphasis on their relationships in space and time to geological features of the Earth’s crust

A

Metallogeny

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5
Q

any geological, tectonic, lithological or geochemical feature that has played a role in the concentration of one or more elements in the Earth’s crust

A

Metallotect

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6
Q

a unit of geologic time favorable for the deposition of ores or characterized by a particular assemblage of deposit type

A

Metallogenic Epoch

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7
Q

a region characterized by a particular assemblage of mineral deposit types

A

Metallogenic Province

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8
Q

refers to ore deposits that form at the same time as their host rocks

A

Syngenetic

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9
Q

refers to ore deposits that form after their host rocks

A

Epigenetic

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10
Q

refers to mineralization caused by ascending hydrothermal solutions

A

Hypogene

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11
Q

refers to mineralization caused by descending solutions

A

Supergene

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12
Q

concentration caused by processes in the Earth’s interior. i.e vein and lode deposits

A

Endogenetic:

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13
Q

concentration caused by processes at the Earth’s surface

A

Exogenetic

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14
Q

concentration of metals by abstraction from surrounding rock

A

Lateral secretion

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15
Q

ores formed by hot aqueous solution

A

Hydrothermal deposits

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16
Q

hydrothermal ore deposits formed at shallow depths (less than ____ meters) and fairly low temperatures (______ °C).

A

Epithermal
1500m
50-200C

17
Q

hydrothermal ore deposits formed at intermediate depths (_____ meters) and temperatures (_____ °C).

A

Mesothermal
1500-4500m
200-400C

18
Q

hydrothermal ore deposits formed at substantial depths (greater than ____ meters) and elevated temperatures (______ °C).

A

Hypothermal
>4500m
400-600C

19
Q

open fissures filled with mineral leached from the adjacent rocks

A

Veins

20
Q

ore formed from either magma or fluids

A

Primary Ore

21
Q

ore formed as consequences of alteration of preexisting material

A

Secondary ore

22
Q

process where a partly crystallized magma is subject to stress, the fluid fraction is squeezed off from the residual crystalline mash

A

Filter pressing

23
Q

the gangue minerals of historic lead-zinc mining in the English Pennine ore field, are now major minerals, with galena and sphalerite as byproducts

A

Fluorite and Barite

24
Q

another term in common use, is extensive and unmineralized, and presumably it has nothing to do with the mineral deposit

A

Country Rock

25
Q

association may occur in foliated metamorphic rocks, in tactite, within an intrusion, or in relatively unaltered limeston

A

pyrite-galena-sphalerite-quartz

26
Q

Rocks and ore deposits share another characteristic. Their components have entered new surroundings from time to time during geologic history where they have retained some aspects ad change other aspects in their mineralogical nature under the new geochemical conditions.

A

Heritage

27
Q

An important industrial mineral composed of calcium and fluorine. It is deposited in veins by hydrothermal processes. It is also found in the fractures and cavities of some limestones and dolomites

A

Fluorite

28
Q

The nonmetallic mineral with an incredible specific gravity. Specific gravity is 4.5, which is exceptional for a nonmetallic mineral. The high specific gravity of _____ makes it suitable for a wide range of industrial, medical, and manufacturing uses.

A

Barite

29
Q

Large, low grade deposits usually associated with a porphyritic intrusive body.

A

A. Cu-Mo
B. Cu (-Au)
C. Mo (-W tungsten)

Mining & Exploration Geology (4 decks)

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