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Peralkaline trachyte

A rock subtype
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A trachyte containing alkali pyroxenes or amphiboles, or with (Na2O+K2O)>Al2O3.


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Unique IdentifiersHide

Mindat ID:
48479
Long-form identifier:
mindat:1:1:48479:4

Classification of Peralkaline trachyteHide

QAPF_V_7.png

Trachyte appears in field 7 in the QAPF diagram.

TAS_T.png

Trachyte is found in field T in the TAS diagram.

Sub-divisions of Peralkaline trachyteHide

Mineralogy of Peralkaline trachyteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > Alkali FeldsparA subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium.
Feldspar > Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Amphibole(Na, K, ◻)(Ca,Na)2(Mg,Fe,Al)5((Si,Al)8O22)(OH,F,Cl,O)2
PyroxeneADSi2O6

Synonyms of Peralkaline trachyteHide

Internet Links for Peralkaline trachyteHide

References for Peralkaline trachyteHide

Reference List:
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