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⇱ Dioritoid: Mineral information, data and localities.

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Dioritoid

A rock classification type
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About DioritoidHide

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A field term for coarse-grained crystalline normal igneous rocks with <90% mafic minerals and the felsic minerals containing <20% quartz, <10% felspathoids and plagioclase being >65% of total feldspars. The plagioclase is sodium rich, in contrast to gabbroids, which have calcium rich plagioclase. The group includes diorite, quartz diorite, quartz monzodiorite, foid- bearing diorite, foid- bearing monzodiorite and monzodiorite.


Unique IdentifiersHide

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Mindat ID:
48224
Long-form identifier:
mindat:1:1:48224:6

Similar NamesHide

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DiorititeA rock subtype

Classification of DioritoidHide

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👁 QAPF_P_9,_9star,_9-,10,10star,10-.png


float='left'>Dioritic rocks are in sections 9,9*,9’,10,10* and 10' of the QAPF diagram.

Sub-divisions of DioritoidHide

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Mineralogy of DioritoidHide

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Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Amphibole > HornblendeAnCa2(Z2+5-mZ3+m)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Mica > BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2

Synonyms of DioritoidHide

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Internet Links for DioritoidHide

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mindat.org URL:
https://www.mindat.org/min-48224.html
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References for DioritoidHide

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Reference List:
Quick NavTopAbout DioritoidUnique IdentifiersSimilar NamesClassification Sub-divisions Mineralogy SynonymsInternet Links References
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To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
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