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Melanocratic nephelinolite

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A nephelinolite consisting of 10% to 30% nepheline with pyroxene. Previously called melteigite.


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Classification of Melanocratic nephelinoliteHide

QAPF_P_15.png

Foidolite is in section 15 of the QAPF diagram.

Sub-divisions of Melanocratic nephelinoliteHide

Mineralogy of Melanocratic nephelinoliteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspathoid > NephelineNa3K(Al4Si4O16)
PyroxeneA petrological term for Pyroxene Group.
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Amphibole > HornblendeAn informal name for dark green to black amphiboles, mostly ferro-hornblende or ...
Mica > BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2

Synonyms of Melanocratic nephelinoliteHide

Internet Links for Melanocratic nephelinoliteHide

 
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