Icelandite
A rock subtype
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Name:
after the country Iceland
A variety of intermediate volcanic rock containing phenocrysts of andesine, clinopyroxene and/or orthopyroxene and/or pigeonite and less commonly olivine in a groundmass of the same minerals. It differs chemically from a typical orogenic andesite in being poorer in alumina and richer in iron.
Icelandites are between rhyodacite and tholeiitic basalt in composition and contain andesine, hypersthene and augite, with a silica content greater than 60% (Wikipedia).
Icelandites are between rhyodacite and tholeiitic basalt in composition and contain andesine, hypersthene and augite, with a silica content greater than 60% (Wikipedia).
Unique Identifiers
Mindat ID:
51210
Long-form identifier:
mindat:1:1:51210:3
GUID
(UUID V4):
(UUID V4):
90e3bbd3-9077-4733-9993-f847bdb98926
Classification of Icelandite
Sub-divisions of Icelandite
- Icelandite
Mineralogy of Icelandite
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Feldspar > Plagioclase > Andesine | (Na,Ca)[Al(Si,Al)Si2O8] |
Olivine | Commonly used as a synonym for a member of the Fayalite-Forsterite Series, but more generally and properly ... |
Pyroxene > Clinopyroxene | A petrological term for Clinopyroxene Subgroup. |
Pyroxene > Clinopyroxene > Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Pyroxene > Orthopyroxene | A petrological term for Orthopyroxene Subgroup. |
Internet Links for Icelandite
mindat.org URL:
https://www.mindat.org/min-51210.html
Please feel free to link to this page.
Please feel free to link to this page.
References for Icelandite
Localities for Icelandite
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Australia | |
| Knutson +4 other references |
| Ross +2 other references |
| Sutton (2017) |
Canada | |
| On Geology and Ore Deposits of the Timmins District (open file 2161, field trip 6) |
Iceland | |
| Carmichael et al. (1967) |
New Zealand | |
| Sewell +7 other references |