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Melatonalite
A rock subtype
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A tonalite with an M' colour index of greater than 40.
Depending on the mafic content the melatonalite field ranges from:
2-24% quartz
8-32% plagioclase
up to 1% K feldspar or albite (usually the latter)
40-90% mafic minerals (amphiboles, pyroxenes, biotite)
Depending on the mafic content the melatonalite field ranges from:
2-24% quartz
8-32% plagioclase
up to 1% K feldspar or albite (usually the latter)
40-90% mafic minerals (amphiboles, pyroxenes, biotite)
Unique Identifiers
Mindat ID:
48175
Long-form identifier:
mindat:1:1:48175:1
Similar Names
| Metatonalite | A rock classification type |
Classification of Melatonalite
Tonalite is in section 5 of the QAPF diagram.
Mineralogy of Melatonalite
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 | (Na, K, ◻)(Ca,Na)2(Mg,Fe,Al)5((Si,Al)8O22)(OH,F,Cl,O)2 |
Internet Links for Melatonalite
mindat.org URL:
https://www.mindat.org/min-48175.html
Please feel free to link to this page.
Please feel free to link to this page.
References for Melatonalite
Localities for Melatonalite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
India | |
| Ackerman et al. (2017) |
