Anorthitite

A rock subtype

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A term proposed for a variety of anorthosite consisting essentially of anorthite. In the original description the composition of the plagioclase was probably incorrectly determined.

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Unique IdentifiersHide

Mindat ID:

50552

Long-form identifier:

mindat:1:1:50552:9

GUID
(UUID V4):

94f60e95-c3dd-4740-8337-c1b86f933d53

Classification of AnorthititeHide

Rock
- Igneous rock
  - Normal crystalline igneous rock
    - Coarse-grained ("plutonic") crystalline igneous rock
      - Anorthositoid
        Anorthosite
        Calciclasite
        Anorthitite

Anorthosite is in section 10 of the QAPF diagram.

Mineralogy of AnorthititeHide

Essential minerals - these are minerals that are required within the classification of this rock:

Feldspar > Plagioclase > Anorthite

Ca(Al₂Si₂O₈)

Internet Links for AnorthititeHide

mindat.org URL:

https://www.mindat.org/min-50552.html
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References for AnorthititeHide

Reference List:

Le Maitre, R. W. - Ed. (2002) Igneous Rocks - A Classification and Glossary of Terms (2nd ed.) Cambridge University Press. doi:10.1017/cbo9780511535581

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