Dacitoid
A rock classification type
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About Dacitoid
Rocks tentatively identified as dacite, with felsics comprising >20% quartz and alkali feldspar/plagioclase <0.5
Unique Identifiers
Mindat ID:
50637
Long-form identifier:
mindat:1:1:50637:9
GUID
(UUID V4):
(UUID V4):
2d09be9a-4e8c-4e8c-91ab-e1d6ba10f1df
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 | (Na,Ca)[(Si,Al)AlSi2]O8 |
| 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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Search Engines:
Cerro de Potosí, Potosí City, Potosí, Bolivia