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.
Unique Identifiers
Mindat ID:
50539
Long-form identifier:
mindat:1:1:50539:8
GUID
(UUID V4):
(UUID V4):
568d3645-4739-4dde-ba1f-fe7f584cee7f
Classification of Alkali gabbro
Alkali gabbro is in section 10' of the QAPF diagram.
Mineralogy of Alkali gabbro
Essential minerals - these are minerals that are required within the classification of this rock:
Calcic plagioclase | A petrological term for plagioclase series feldspars dominant in calcium. |
Feldspathoid | A family of rock-forming minerals consisting of aluminosilicates of sodium, potassium, or calcium and having too ... |
Mafic minerals | A 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:
Analcime | Na(AlSi2O6) · H2O |
Barkevikite | An obsolete name for a dark amphibole originally described by Brøgger (1887, 1890) from the nepheline syenite ... |
Feldspathoid > Nepheline | Na3K(Al4Si4O16) |
Kaersutite | NaCa2(Mg3AlTi4+)(Si6Al2)O22O2 |
Titanium-bearing Augite | (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6 |
Pronunciation of Alkali gabbro
Pronunciation:
Play | Recorded by | Country |
---|---|---|
Jolyon & Katya Ralph | United Kingdom |
Synonyms of Alkali gabbro
Internet Links for Alkali gabbro
mindat.org URL:
https://www.mindat.org/min-50539.html
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