From Wikipedia, the free encyclopedia
Peridotite
xenoliths (green) in phonotephrite from
Peridot Mesa , Arizona
Phonotephrite or phono-tephrite is a strongly
alkaline
volcanic rock with a composition between
phonolite and
tephrite .
[1] This unusual
igneous rock contains 7 to 12%
alkali content and 45 to 53%
silica content (see
TAS diagram ). It can be described as a
mafic phonolite or a
potassic tephrite. Phonotephrite lava flows and
volcanic cones have been identified in Antarctica (e.g.
Mount Erebus ), Europe (e.g.
Mount Vesuvius ), North America (e.g.
Satah Mountain volcanic field ) and Africa (e.g.
Jbel Saghro ).
[2]
[3]
[4]
[5]
See also
References
^
"Unusual Lava Types" . Strongly Alkaline Lavas .
San Diego State University . Archived from
the original on 2020-11-05. Retrieved 2016-09-11 .
^ P. Esser, Richard; R. Kyle, Philip; McIntosh, William C. (2004). "40 Ar/39 Ar dating of the eruptive history of Mount Erebus, Antarctica: volcano evolution".
Bulletin of Volcanology . 66 (8).
Springer : 671.
Bibcode :
2004BVol...66..671E .
doi :
10.1007/s00445-004-0354-x .
S2CID
129118037 .
^ Kuehn, Christian; Guest, Bernard; K. Russell, James; A. Benowitz, Jeff (2015). "The Satah Mountain and Baldface Mountain volcanic fields: Pleistocene hot spot volcanism in the Anahim Volcanic Belt, west-central British Columbia, Canada".
Bulletin of Volcanology .
Springer : 8.
^ Berger, J.; Ennih, N.; Mercier, J.-C. C.; Liégeois, J.-P.; Demaiffe, D. (2009). "The role of fractional crystallization and late-stage peralkaline melt segregation in the mineralogical evolution of Cenozoic nephelinites/phonolites from Saghro (SE Morocco)".
Mineralogical Magazine . 73 (1).
Mineralogical Society of Great Britain and Ireland : 59.
Bibcode :
2009MinM...73...59B .
doi :
10.1180/minmag.2009.073.1.59 .
ISSN
1471-8022 .
S2CID
54866658 .
^ Pichavant, M.; Scaillet, B.; Pommier, A.; Iacono-Marziano, G.; Cioni, R. (2014).
"Nature and Evolution of Primitive Vesuvius Magmas: an Experimental Study" .
Journal of Petrology . 55 (11).
Oxford University Press : 2281–2310.
doi :
10.1093/petrology/egu057 .