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Hornblende granite

A rock subtype
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A granite containing hornblende.
Informally, a felsic plutonic rock, generally adamellite or granodiorite, containing an amphibole (often hornblende) as an essential dark-colored constituent; with decreasing quartz it grades through tonalite into normal diorite.


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Unique IdentifiersHide

Mindat ID:
48162
Long-form identifier:
mindat:1:1:48162:7

Classification of Hornblende graniteHide

QAPF_P_3.png

Granite is in section 3 of the QAPF diagram.

Mineralogy of Hornblende graniteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Amphibole > HornblendeAnCa2(Z2+5-mZ3+m)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Feldspar > Alkali FeldsparA subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium.
Feldspar > Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Silica > QuartzSiO2

Internet Links for Hornblende graniteHide

References for Hornblende graniteHide

Reference List:
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