Dacitoid
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Rocks tentatively identified as dacite, with felsics comprising >20% quartz and alkali feldspar/plagioclase <0.5
Classification of Dacitoid
Dacitic rock appears in fields 4 and 5 in the QAPF diagram.
Dacitic rock is found in field 'O3' in the TAS diagram.
Sub-divisions of Dacitoid
Mineralogy of Dacitoid
Essential minerals - these are minerals that are required within the classification of this rock:
| Feldspar > Plagioclase | A petrological term for Albite-Anorthite Series. |
| Silica > Quartz | SiO2 |
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
| Amphibole > Hornblende | An informal name for dark green to black amphiboles, mostly ferro-hornblende or ... |
| Feldspar > Alkali Feldspar | A subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium. |
| Pyroxene > Clinopyroxene > Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Synonyms of Dacitoid
Internet Links for Dacitoid
mindat.org URL:
https://www.mindat.org/min-50637.html
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