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Alkali gabbro

A rock subtype
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A variety of gabbro in QAPF field 10', with alkaline character due to the presence of analcime or nepheline and such dark constituents as barkevikite, kaersutite, titanian augite etc.


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Unique IdentifiersHide

Mindat ID:
50539
Long-form identifier:
mindat:1:1:50539:8

Classification of Alkali gabbroHide

QAPF_P_10-.png

Alkali gabbro is in section 10' of the QAPF diagram.

Mineralogy of Alkali gabbroHide

Essential minerals - these are minerals that are required within the classification of this rock:
Calcic plagioclaseA petrological term for plagioclase series feldspars dominant in calcium.
FeldspathoidA family of rock-forming minerals consisting of aluminosilicates of sodium, potassium, or calcium and having too ...
Mafic mineralsA petrological term for dark, rock-forming minerals rich in magnesium and/or iron.
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
AnalcimeNa(AlSi2O6) · H2O
BarkevikiteAn obsolete name for a dark amphibole originally described by Brøgger (1887, 1890) from the nepheline syenite ...
Feldspathoid > NephelineNa3K(Al4Si4O16)
KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6

Pronunciation of Alkali gabbroHide

Pronunciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Synonyms of Alkali gabbroHide

Internet Links for Alkali gabbroHide

References for Alkali gabbroHide

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