Tephrite
A rock classification type
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About Tephrite
Tephritic rocks, with felsics comprising 10-60% foids and alkali feldspar/total feldspar <10%, and <10% olivine.
A group of fine grained, mafic igneous rocks, generally extrusive, of basaltic character, primarily composed of calcic plagioclase, augite, and feldspathoids (typically nepheline), with little or no alkali feldspar or olivine; also, any member of that group; the extrusive equivalent of theralite. With the addition of olivine, the rock would be called a basanite. With decreasing feldspathoids, it grades into alkaline basalt; with increasing feldspathoids, it grades into foidite.
A group of fine grained, mafic igneous rocks, generally extrusive, of basaltic character, primarily composed of calcic plagioclase, augite, and feldspathoids (typically nepheline), with little or no alkali feldspar or olivine; also, any member of that group; the extrusive equivalent of theralite. With the addition of olivine, the rock would be called a basanite. With decreasing feldspathoids, it grades into alkaline basalt; with increasing feldspathoids, it grades into foidite.
Unique Identifiers
Mindat ID:
48563
Long-form identifier:
mindat:1:1:48563:2
GUID
(UUID V4):
(UUID V4):
7f2cbb5c-ce0a-42cf-81e4-638e53491dc9
Classification of Tephrite
Tephrite appears in field 14 in the QAPF diagram.^TAS
Sub-divisions of Tephrite
Age distribution
Recorded ages:
Phanerozoic : 71.84 ± 0.51 Ma to 2.30 ± 0.54 Ma - based on 10 recorded ages.
Common Associates
Associated Minerals Based on Photo Data:
| 7 photos of Tephrite associated with Haüyne | Na3Ca(Si3Al3)O12(SO4) |
| 1 photo of Tephrite associated with Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Internet Links for Tephrite
mindat.org URL:
https://www.mindat.org/min-48563.html
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References for Tephrite
Localities for Tephrite
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.
Benešov nad Ploučnicí, Děčín District, Ústí nad Labem Region, Czech Republic