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CORRELATION 2 REVIEWER > Alterations > Flashcards

Alterations Flashcards

1
Q

Type of alteration where rocks turn green

A

Propylitic Alteration

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2
Q

Propylitic Alteration occurs at relatively ______________

A

Low Temperature

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3
Q

Propylitic Alteration is characterized by what mineral(s)?

A

Chlorite, Epidote, Antinolite

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4
Q

Usually form from decomposition of Fe-Mg bearing minerals

A

Propylitic Alteration

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5
Q

Forms from decomposition of feldspars.

A

Sericitic Alteration

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6
Q

In Sericitic Alteration, rocks are altered into what mineral?

A

Sericite

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7
Q

An alteration consist of sericite and quartz

A

Phyllic Alteration

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8
Q

High temperature type of alteration which results from potassium enrichment

A

Potassic Alteration

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9
Q

Minerals associated with Potassic alteration

A

Biotite, K-feldspar, Adularia

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10
Q

Potassic alteration can occur in?

A

(a) Deep plutonic environment
(b) Shallow volcanic environment

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11
Q

This mineral is formed in shallow volcanic environment

A

Adularia

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12
Q

Can form before complete crystallization of magma

A

Potassic Alteration

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13
Q

A relatively high temperature type of alteration where albite or sodic plagioclase are formed.

A

Albitic

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14
Q

It’s presence usually indicates Na Enrichment

A

Albitic Alteration

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15
Q

A process by which Ca-bearing plagioclase feldspar is altered to a characteristic assemblage of saussurite

A

Saussurotization

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16
Q

A type of alteration where pyroxene is changed into amphibole

A

Uralitization

17
Q

A type of alteration where secondary silica (SiO2) is added

A

Silicification

18
Q

It is one of the most common type of alteration and occurs in many different styles

A

Silification

19
Q

Silification can occur in ________ temperature

A

Wide range

20
Q

General term for addition of silica by forming any type of silicate mineral

A

Silication

21
Q

Formation of a type of rock called greisen

A

Greisenization

22
Q

General term for the addition of any type of carbonate mineral

A

Carbonatization

23
Q

Type of alteration that is closely associated with certain hot springs environment.

A

Alunitic

24
Q

The presence of this mineral suggest high SO4 content

A

Alunite

25
Q

Presence of alunite suggest ______

A

High SO4 content

26
Q

Low temperature, acidic alteration

A

Argilic

27
Q

Type of alteration that includes the bleaching out of feldspars

A

Argilic alteration

CORRELATION 2 REVIEWER (22 decks)

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