http://cidian.youdao.com/ WebSystematic analyses were conducted including the petrographic features, major and trace elements, Sr and Nd isotopic compositions, and mineral structure and compositions of whole rocks. Mid ...
Phonotephrite and phonolite in the Tarim Large Igneous Province ...
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http://www.dlatjx.com/zaixian/ Phonotephrite or phono-tephrite is a strongly alkaline volcanic rock with a composition between phonolite and tephrite. 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 … WebPhonotephrite Picrite Porphyry Pumice Pyroxenite Quartz 🅱 diorite Quartz 💎 monzonite Quartzolite Rhyodacite Rhyolite (Comendite and Pantellerite) Scoria Shonkinite Sovite, Syenite Tachylyte Tephriphonolite Tephrite Tonalite Trachyandesite Benmoreite Trachybasalt (Hawaiite) Trachyte Troctolite lithia benefits department