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Leucite tephrite from Mayen, Eifel, Germany
Tephrite is an igneous, volcanic (extrusive) rock, with aphanitic to porphyritic texture. Mineral content is usually abundant feldspathoids (leucite or nepheline), plagioclase, and lesser alkali feldspar. Pyroxenes (clinopyroxenes) are common accessory minerals. Quartz and olivine are absent. Occurrences include leucite nepheline tephrite from Hamberg bei Neckarelz near Heidelberg, Germany,[1] phonolite-tephrite at Monte Vulture, Basilicata, Italy and basanite–tephrite intrusions in Namibia.
^Frenzel, Gerhard (1953). "Die Erzparagenese des Katzenbuckels im Odenwald". Contributions to Mineralogy and Petrology (in German). 3 (6): 409–444. doi:10.1007/BF01129196.. Retrieved 2012-04-11.
Tephrite is an igneous, volcanic (extrusive) rock, with aphanitic to porphyritic texture. Mineral content is usually abundant feldspathoids (leucite or...
places basanite in the basanite/tephrite field of the QAPF diagram. Basanite is further distinguished from tephrite by having a normative olivine content...
Phonotephrite or phono-tephrite is a strongly alkaline volcanic rock with a composition between phonolite and tephrite. This unusual igneous rock contains...
phonolite and tephritePages displaying wikidata descriptions as a fallback – A volcanic rock with a composition between phonolite and tephrite Picrite – Variety...
(1853–1916). At Vesuvius it occurs as alterations from gypsum within leucite tephrite and as fumarole deposits. It occurs in dry lake beds in California and...
its chemical composition. For example, basanite is distinguished from tephrite by having a high normative olivine content. Other refinements to the basic...
firstly erupted, followed by a tephritic phonolite and finally a phonolitic tephrite). According to the Smithsonian Institution's Global Volcanism Program,...
rebuilt and open for travelers now. Pico do Fogo consists of basanite, tephrite, phonotephrite, clinopyroxene, amphibole, magnetite, olivine, melilite...
Nepheline-porphyry Essexite and Theralite Ijolite and Missourite Effusive type or Lavas Phonolite, Leucitophyre Tephrite and Basanite Nepheline-basalt, Leucite-basalt...
silica content can range from ultramafic (nephelinites, basanites and tephrites) to felsic (trachytes). They are more likely to be generated at greater...
silica content can range from ultramafic (nephelinites, basanites and tephrites) to felsic (trachytes). They are more likely to be generated at greater...
as extinct. The volcanic rocks range from ankaramitic basanite through tephrite to phonolite and some have ultra-potassic compositions, which is unusual...
researches. They succeeded in producing such rocks as porphyrite, leucite-tephrite, basalt and dolerite, and obtained also various structural modifications...
foidal basalt with essential calic plagioclase and essential olivine. Tephrite is foidal basalt with essential calic plagioclase but without essential...
and tephrites but less than basaltic andesite. Basalt has a lower total content of alkali oxides than trachybasalt and most basanites and tephrites. Basalt...
Canary Islands. Ecuador: Phenocrysts found in alkaline extrusive rocks (tephrite), product of effusive volcanism of the Sumaco volcano, of northeast Ecuador...
potassic variants are Benmoreite and Latite. Pc (Picrobasalt) U1 (Basanite or Tephrite)—Use normative mineralogy to decide. U2 (Phonotephrite) U3 (Tephriphonolite)...
(84 cu mi), additional volcanic rocks are basaltic andesite, hawaiite and tephrite. Basaltic rocks range from alkali basalt to tholeiite. Potassium-argon...
the cliffs at Cabo Girão, namely trachybasalt, trachyandesite, trachyte, tephrite and ashes, lapilli and breccia tuff. The facades are predominantly plastered...
trachyandesite and trachyte, as well as mafic rocks like basanite and tephrite. The erupted rocks define two alkaline suites. Phenocryst chemistry and...
volcanoes. The main volcanic rocks include alkali basalt, basalt, hawaiite and tephrite. They define an alkaline suite, some samples trend towards subalkaline...
Gusev plains rocks lie near the junction of basalt, picrobasalt, and tephrite. The Irvine-Barager classification calls them basalts. On March 18, 2013...
erupted after the cessation of subduction. These range in age from the tephrites at Mount Pinafore (5.5–7.6 Ma), to the basanites at Rothschild Island...
dominant rock of outcrops, with phonolite less common and picrobasalt and tephrite rare. Outcrops of older rocks include mugearite, rhyolite and trachyte...
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