Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Quartz-norite

A rock subtype
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A gabbro composed essentially of calcic plagioclase, quartz and orthopyroxene.


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Unique IdentifiersHide

Mindat ID:
48290
Long-form identifier:
mindat:1:1:48290:9

Classification of Quartz-noriteHide

QAPF_P_10.png

Gabbro is in section 10 of the QAPF diagram.

Sub-divisions of Quartz-noriteHide

Mineralogy of Quartz-noriteHide

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.
Pyroxene > OrthopyroxeneA petrological term for Orthopyroxene Subgroup.
Silica > QuartzSiO2
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

Internet Links for Quartz-noriteHide

References for Quartz-noriteHide

Reference List:
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