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GLE Reviews > IUGS > Flashcards

IUGS Flashcards

1
Q

nomenclature the term “igneous rock” is taken to mean

A

“Massige Gesteine”

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2
Q

Mineral groups used for modal classification for plutonic rocks

A

Q = Qtz, Tridymite, Cristobalite
A =Kfelds [An0-5]
P = Plagioclase [An5-100], Scapolite
F = Feldspathoids
M = Mafics.

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3
Q

CIPW meaning

A

Cross, Iddings, Pirsson, and Washington

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4
Q

hyalo-Ne basanite

A

Limburgite

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5
Q

Prefixes for rocks with glass

A

0 – 20 glass-bearing
20 – 50 glass-rich
50 – 80 glassy

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6
Q

If the pyroclastic fragments have been altered they are _________ or ________ if thier pyroclastic origin is uncertain

A

reworked pyroclasts; epiclasts

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7
Q

pyroclasts of any shape with a mean diameter of 64 mm to 2 mm

A

lapili

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8
Q

pyroclasts with a mean diameter of less than 2 mm

A

ash grains

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9
Q

pyroclasts the mean diameter of which exceeds 64 mm and whose angular to subangular shape indicates that they were solid during their formation.

A

Blocks

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10
Q

pyroclasts the mean diameter of which exceeds 64 mm and whose shape or surface (e.g. bread-crust surface) indicates that they were in a wholly or partly molten condition during their formation and subsequent transport

A

Bombs

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11
Q

Consolidated pyroclast are? Unconsolidated?

A

Pyroclastic rocks; tephra

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12
Q

a pyroclastic rock in which
bombs > 75%.

A

Agglomerate

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13
Q

a pyroclastic rock in which blocks > 75%.

A

Pyroclastic Breccia

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14
Q

pyroclastic rock in which bombs and/or blocks range in amount from 25% to 75%.

A

Tuff breccia

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15
Q

pyroclastic rock in which bombs and/or blocks < 25%, and both lapilli and ash < 75%.

A

Lapilli tuff

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16
Q

a pyroclastic rock in which lapilli > 75%.

A

lapilistone

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17
Q

a pyroclastic rock in which ash > 75%.

A

Tuff or ash tuff

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18
Q

rocks which contain both pyroclastic and
normal clastic (epiclastic) material

A

tuffites

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19
Q

rock contains more than 50% modal carbonates

A

carbonatites

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20
Q

coarse grained rock from calcite-carbonatite

A

sovite

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21
Q

medium to fine grained rock from calcite-carbonatite

A

alvikite

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22
Q

the main carbonate is dolomite.

A

Dolomite - Carbonatite
AKA Beforsite

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23
Q

the main carbonate is iron-rich, less than 20% silica

A

Ferrocarbonatite

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24
Q

carbonatites essentially composed of sodium, potassium, and calcium carbonates.

A

Natrocarbonatite

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25
Q

rock type found in Oldoinyo Lengai, Tanzania

A

Natrocarbonatite

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26
Q

the main carbonate is Mg rich, less than 20% silica

A

Magnesiocarbonatite

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27
Q

the main carbonate is Ca rich, less than 20% silica

A

Calciocarbonatite

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28
Q

Carbonatite >20% silica

A

silicocarbonatite

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29
Q

The general term for plutonic melilite-bearing rocks is ______, and for volcanic melilitebearing rocks it is _

A

melilitolite;
melilitite

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30
Q

melilitolites with melilite > 65% be termed

A

“ultramelilitolites”.

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31
Q

perovskite > 10%; melilite <65%
-Kugdite
-Afrikandite
-Okaite

A

afrikandite

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32
Q

olivine> 10%; melilite <65%
-tujarite
-uncompahgrite
-kugdite

A

kugdite

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33
Q

haüyne> 10%; melilite <65%
-unconpahgrite
-okaite
-Tjarite

A

okaite

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34
Q

nepheline> 10%; melilite <65%
-afrikandite
-okaite
-tujarite

A

tujarite

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35
Q

pyroxene> 10%; melilite <65%
- uncompahgrite
- kugdite
- afrikandite

A

uncompahgrite

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36
Q

volcanic rocks w/ kalsilite and absence of leucite/melilite? plutonic?

A

Kalsilitite; Pyroxenite

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37
Q

A name for the distinctive series of consanguineous rocks katungite, mafurite and ugandite
Presence of kalsilite, leucite, and melilite

A

Kamafugite

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38
Q

Other term of kalsilite syenite

A

synnyrite

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39
Q

Other term of kalsitite-biotite-pyroxenite

A

yakutite

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40
Q

Historical name of Ol-Px kalsitite

A

Mafurite

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41
Q

Historical name of Px-Ol leucite

A

Ugandite

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42
Q

Historical name of melilite with:
Leu-Ol?
Phl-Ol?
Phl?

A

Katungite
Venanzite
Coppaelite

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43
Q

the diamond-bearing, porphyritic mica peridotites of the Kimberley area of South Africa

A

Kimberlites

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44
Q

group of volatile rich (dominantly CO2) potassic ultrabasic rocks commonly exhibiting a distinctive inequigranular texture

A

group I kimberlites

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45
Q

belong to a clan of ultrapotassic, peralkaline volatile-rich (dominantly H2O) rocks, characterized by phlogopite macrocrysts and microphenocrysts, together with groundmass micas which vary in composition

A

group II kimberlites (or orangeites)

46
Q

Macrocryst foundin group I kimberlites

A

Olivine

47
Q

Mineralogically they are characterized by the presence of widely varying amounts (5 – 90 vol %) of
phenocrystic phlogophites, richterite grounndmass, forsteritic Ol, Diopside, Fe Leucite, Fe sanidine

A

Lamproites

48
Q

Chemical characterisitcs of lamproites

A

Ultrapotassic (K2O/Na2O >3)
Peralkaline ([K2O+Na2O] /Al2O3 >1)

49
Q

which are hyalo Lamproites
- Verite, Fortunite
- Orendite, Madupite
- Fortunite, Cancalite

A
  • Verite, Fortunite
50
Q

Madupitic Lamproites
-Cedricite, Verite, Cancalite
-Jumilite, Fitzroyite, Madupite
-Madupite, Wolgidite, Jumilite

A

-Madupite, Wolgidite, Jumilite

51
Q

Diopside Lamproites
-Wyomingite, Orendite, Cedricite,
-Calcalite, Fortunite, Verite
-Jumilite, Woldigite, Mamilite

A

-Wyomingite, Orendite, Cedricite,

52
Q

which does NOT display a property of lamprophyre
- porphyritic, mesocratic to malanocratic
- felds and foids groundmass
- Cal, Zeo appear as primary phases; Bt, Amp, essential
- Conrtains various types of perthites

A
  • Conrtains various types of perthites
    (A property seen in charnokites)
53
Q

characterized by the presence of orthopyroxene (or fayalite plus quartz) and, in many of the rocks, perthite, mesoperthite or antiperthite

A

Charnokitic Rocks

54
Q

Opx Granite

A

Charnokite

55
Q

Opx granodiorite

A

Opdalite/ Charno-enderbite

56
Q

Opx tonalite

A

enderbite

57
Q

Opx monzonite;
Opx monzodiorite

A

mangerite;
Jotunite

58
Q

a light colored KFeld Granite

A

Alaskite

59
Q

Granodiorite vs Granogabbro

A

Granodio : An0-50
Granogab: An50-100

60
Q

A light colored tonalite

A

Tondhjemite and Plagiogranite

61
Q

Per-alkalione varity of KFelf Neph Syenite

A

Agpaite

62
Q

may be applied to nepheline monzodiorite or nepheline monzogabbro

A

essexite

63
Q

special terms for ne gabbro and analcime gabbro

A

Theralite; teschenite

64
Q

a dunite where its spinel mineral is magnetite

A

olivinite

65
Q

a rhyolite synonym

A

lipartite

66
Q

this term is used when an kfeld rhyolite contains alkaly px or amp

A

peralkaline rhyolite

67
Q

a transitional rock between rhyolite and dacite

A

rhyodacite

68
Q

High Mg Volcanic Rocks

A

Boninite
Komatiite
Meimechite
Picrite

69
Q

if SiO2 > 52%, MgO > 8% and TiO2 < 0.5%, the rock is a

A

boninite

70
Q

if 52% > SiO2 > 30%, MgO > 18% and (Na2O + K2O ) < 2%, then the rock is a ______if TiO2 < 1% or a _________ if TiO2 > 1%

A

komatiite;
meimechite

71
Q

if 52% > SiO2 > 30%, MgO > 12%, and
(Na2O + K2O ) < 3%, it is a .

A

picrite

72
Q

if normative ne > 20% the rock is a .

A

nephelinite

73
Q

if normative ne < 20% and ab is present but is < 5% the rock is a .

A

melanephelinite

74
Q

A high Aluminum Ryolite/Trachyte

A

Comendite;
comditic trachyte

75
Q

A low Aluminum Ryolite/Trachyte

A

pantellerite;
panterlleritic trachyte

76
Q

division of trachybasalt

A

Hawaiite (Sodic)
Potassic Trachybasalt

77
Q

division of basaltic trachyandesite

A

mugearite (“sodic”)
shoshonite (“potassic”)

78
Q

division of trachyandesite

A

benmoreite (“sodic”)
latite (“potassic”).

79
Q

QAPF
<5% Qtz

A

KFeld Syenite : 0-10 A
Syenite : 10-35 A
Monzonite : 35-65 A
MonzoDio/Gab : 65-90 A
Dio/Gab : 90-100 A

80
Q

QAPF
5-20% Qtz

A

Qtz KFeld Syenite : 0-10 A
Qtz Syenite : 10-35 A
Qtz Monzonite : 35-65 A
Qtz MonzoDio/Gab : 65-90 A
Qtz Dio/Gab/An : 90-100 A

81
Q

QAPF
20-60% Qtz

A

KFeld Granite: 0-10 A
SyenoGranite : 10-35 A
MonzoGranite : 35-65 A
Granodiorite : 65-90 A
Tonalite : 90-100 A

82
Q

QAPF
60-90% Qtz

A

Qtz Rich granitoid

83
Q

QAPF
90-100% Qtz

A

Quartzolite

84
Q

QAPF
<10% Felds

A

Foid- bearing KFeld Syenite : 0-10 A
Foid- bearing Syenite : 10-35 A
Foid- bearing Monzonite : 35-65 A
Foid- bearing MonzoDio/Gab : 65-90 A
Foid- bearing Dio/Gab/An : 90-100 A

85
Q

QAPF
10-60% Felds

A

Foid KFeld Syenite : 0-10 A
Foid monzosyenite : 10-50 A
Foid monzodio/gab : 50-90 A
Foid Dio/Gab : 90-100 A

86
Q

QAPF
>60% Felds

A

foidolite

87
Q

Gabbronoic
plagioclase and clinopyroxene

A

Gabbro

88
Q

Gabbronoic
plagioclase and orthopyroxene

A

Norite

89
Q

Gabbronoic
plagioclase and olivine

A

Troctolite

90
Q

Gabbronoic
plagioclase with almost equal amounts of clinopyroxene and orthopyroxene

A

Gabbronorite

91
Q

Gabbronoic
plagioclase and clinopyroxene with minor amounts of orthopyroxene

A

Orthopyroxene Gabbro

92
Q

Gabbronoic
plagioclase and clinopyroxene with minor amounts of clinopyroxene

A

Clinopyroxene norite

93
Q

Gabbronoic
plagioclase and hornblende with pyroxene < 5%.

A

Hornblende Gabbro

94
Q

UM
Low amount (<10?) Ol
equal cpx, opx

A

Websterite

95
Q

UM
(<40%) Ol
equal cpx, opx

A

Ol Websterite

96
Q

UM
(40-90%) Ol
equal cpx, opx

A

Lherzolite

97
Q

UM
>90% Ol

A

Dunite

98
Q

“UM
Low amount (<10?) Ol
cpx > opx

A

Ol clinopyroxenite

99
Q

“UM
Low amount (<10?) Ol
cpx > opx

A

Ol orthopyroxenite

100
Q

UM
(40-90%) Ol
cpx > opx

A

wherlite

101
Q

UM
(40-90%) Ol
cpx < opx

A

harzburgite

102
Q

UM
(40-90%) Ol
Px > Hbl

A

Pyroxene peridotite

103
Q

UM
(40-90%) Ol
Px = Hbl

A

Pyroxene Hornblende peridotite

104
Q

UM
(40-90%) Ol
Px < Hbl

A

Hornblende peridotite

105
Q

UM
(10-40%) Ol
(10-50%) Hbl

A

Ol Hbl pyroxenite

106
Q

UM
(10-40%) Ol
(10-50%) Px

A

Ol Hbl Hornblendite

107
Q

SiO oversaturated TAS
[including B and UB]

A

Picro-Basalt
Basalt
Basaltic Andesite
Dacite
Rhyolite

108
Q

SiO saturated TAS

A

trachybasalt (H, Pt), Basaltic Trachyandesite (M, Sh), Trachyandesite (B, L,) trachyte/trachydacite

109
Q

SiO undersaturated TAS

A

Foidite, Basanite(ol)/tephrite, phonotephrite, tephriphonolite, phonolite

110
Q

a texture indicating poikilitic phlogopite groundmass

A

madupitic

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