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Metalliferous Ore Deposit > Geothermometry, Geobarometry & Isotope Studies > Flashcards

Geothermometry, Geobarometry & Isotope Studies Flashcards

1
Q

Sequence of deposition of minerals

A

Paragenesis

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2
Q

Collection pr gathering of minerals or rock

A

Assemblage

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3
Q

Having a connection or resemblance with other mineral in certain temperature and pressure regime

A

Associated

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4
Q

The spatial distribution of paragenesis

A

Zoning

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5
Q

The spatial distribution of paragenesis

A

Zoning

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6
Q

Born beside

A

Paragenesis

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7
Q

Measurement of lavas, fumaroles, hot springs

A

Direct Measurement

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8
Q

Indicate the maximum crystallization temperature

A

Melting Point

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9
Q

Some minerals lose their volatile content at certain temperature

A

Dissociation

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10
Q

Transformation of some minerals crystal system to another is temperature dependent

A

Inversion Point

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11
Q

Minerals that form solid solutions unmix at specidic temperatures to yield distinguishable intergrowths

A

Exsolution

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12
Q

Melting Point of Albite

A

1104C

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13
Q

Melting Point of Stibnite

A

546C

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14
Q

Melting Point of Bismuth

A

271C

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15
Q

Exsolution of

Chalcopyrite - Bornite

A

475C

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16
Q

Exsolution of

Cubanite - Chalcopyrite

A

450C

17
Q

Exsolution of

Bornite - Chalcopyrite

A

175-225C

18
Q

similar to inversion and exosoution but applies more specifically to native metals

A

Recystallization

19
Q

Recrystallization temp of

Cu
Ag

A

450C

200C

20
Q

Quartz lose color at

A

240-600C

21
Q

Fluorite lose color at

A

175C

22
Q

indicate the approximate temp of formation of the crystals by the amount of contraction of the liquid, assuming that the liquid originally filled the cavity

A

Fluid Inclusion

23
Q

heating the sample until heterogeneous fluid inclusion homogenizes

A

Filling Temperature (Minimum Temperature of Formation)

24
Q

by the freezing point depression method

A

Total NaCL-equivalent salinity of the fluid

25
Q

The minimum melting point

A

Eutectic Point

26
Q

inclusion is opened up and direct tests are made on the liquid by optical properties

A

Composition of the ore-blearing fluid

27
Q

inclusions formed in growing crystals, no leakage

A

Primary

28
Q

with fracture & sealed again, records conditions of later hydrothermal stage

A

Secondary

29
Q

looks like secondary, but the host crystal was fractured as the crystal was growing

A

Pseudosecondary

30
Q

commonly based on mineral assemblage and composition information

A

Geobarometry

31
Q

estimation of pressure condition at which a geologic material formed

A

Geobarometry

32
Q

an element that has a nuclei that does not change spontaneously

A

Stable isotope

33
Q

decays into daughter isotopes at known rates

A

Radioisotopes

34
Q

amount of time needed for one half of radioactive parent to decay

A

Half-life

35
Q

is any Pb from a rock or mineral that contains a large amount of Pb and a small amount of the radioactive progenitors of Pb

A

Common Lead

Metalliferous Ore Deposit (5 decks)

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