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Pantelleritic rhyolite

A rock classification type
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A variety of peralkaline rhyolite of TAS field R in which Al2O3 <1.33 x total iron as FeO + 4.4.
A peralkaline rhyolite or quartz trachyte with normative quartz exceeding 10%. It is more mafic than comendite.



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Unique IdentifiersHide

Mindat ID:
48456
Long-form identifier:
mindat:1:1:48456:3

Classification of Pantelleritic rhyoliteHide

QAPF_V_3.png

Rhyolite appears in field 3 in the QAPF diagram.

TAS_R.png

Rhyolite is found in field 'R' in the TAS diagram.

Mineralogy of Pantelleritic rhyoliteHide

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.
Silica > QuartzSiO2
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Alkali pyroxeneA petrological name for the sodium-rich pyroxenes aegirine and aegirine-augite.
Amphibole(Na, K, ◻)(Ca,Na)2(Mg,Fe,Al)5((Si,Al)8O22)(OH,F,Cl,O)2
Feldspar > Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8

Synonyms of Pantelleritic rhyoliteHide

Internet Links for Pantelleritic rhyoliteHide

References for Pantelleritic rhyoliteHide

Reference List:
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