Photomicrograph of thin section of latite (in plane polarised light)Photomicrograph of thin section of latite (in cross polarised light)
Latite is an igneous, volcanic rock, with aphanitic-aphyric to aphyric-porphyritic texture. Its mineral assemblage is usually alkali feldspar and plagioclase in approximately equal amounts. Quartz is less than five percent and is absent in a feldspathoid-bearing latite, and olivine is absent in a quartz-bearing latite. When quartz content is greater than five percent the rock is classified as quartz latite.[1] Biotite, hornblende, pyroxene and scarce olivine or quartz are common accessory minerals. Feldspathoid-bearing latite is sometimes referred to as tristanite.[2]
Rhomb porphyries are an unusual variety with gray-white porphyritic rhomb shaped phenocrysts embedded in a very fine grained red-brown matrix. The composition of rhomb porphyry places it in the trachyte - latite classification of the QAPF diagram.
Latite is found, for example, as lavas in Bulgaria[3] and as intrusive laccoliths and sills in South Dakota, USA.[4]
^Classification of Igneous Rocks Archived 2011-09-30 at the Wayback Machine
^Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge University Press. p. 140-141. ISBN 9780521880060.
^Georgiev, V.; Milovanov, P. (2001). "Volcanism in the Momchilgrad Volcanotectonic Depression". Comptes rendus de l'Académie bulgare des Sciences. 54 (3): 63–66. Bibcode:2001CRABS..54c..63G. Retrieved on 5 July 2015.
^"Latitic Intrusive Rocks". USGS. Retrieved 5 July 2015.
feldspathoid-bearing latite, and olivine is absent in a quartz-bearing latite. When quartz content is greater than five percent the rock is classified as quartz latite. Biotite...
enriched in alkali metal oxides. Quartz latite is intermediate between latite and rhyolite in its mineralogy. Quartz latite is the fine-grained equivalent of...
intrusive rock dominated by mafic phenocrysts in a feldspar groundmass Latite – Type of volcanic rock – A silica-undersaturated form of andesite Lherzolite –...
level and is overlain by about 20m of porphyritic basalt, termed Bombo Latite member. The contact between the two units is well-exposed in the cliff section...
The fine grained volcanic rock equivalent of quartz monzonite is quartz latite. The term adamellite was originally applied by A. Cathrein in 1890 to orthoclase-bearing...
gabbro. Intermediate volcanic rocks include andesite, dacite, trachyte, and latite.[citation needed] Pyroclastic rocks are the product of explosive volcanism...
unusually alkali-rich in some cases. Peralkaline phonolitic trachyte and latite have also been produced, and there is rare trachybasalt. Three geological...
classification. These are divided into sodium-rich benmoreite and potassium-rich latite. Trachyandesitic magma can produce explosive Plinian eruptions, such as...
Mountains and Messum Igneous Complex, Namibia. Part II: Voluminous Quartz Latite Volcanism of the Awahab Magma System". Journal of Petrology. 39 (2): 227–253...
ovens were in operation from 1876 through 1879. They were built of quartz latite welded tuff by itinerant Swiss Italian masons who specialized in the ovens...
S. and J. R. Holloway (1984) Lower crustal nodules from the Camp Creek latite, Carefree, Arizona. Kimberlites II: The mantle and cryst-mantle relationships...
minette) might be classified as potassic trachybasalt, shoshonite, or latite using the total alkali-silica diagram (see TAS classification), or as absarokite...
Shoshonite. S3 (Trachyandesite—*Sodic and potassic variants are Benmoreite and Latite. Pc (Picrobasalt) U1 (Basanite or Tephrite)—Use normative mineralogy to...
silica-undersaturated sodium-rich variety of trachyandesite (the other kind is latite) and belongs to the alkaline suite of igneous rocks. Benmoreite has been...
the ratio of potassium to sodium (so that potassic trachyandesites are latites and sodic trachyandesites are benmoreites). Some of the more mafic fields...
the Sierra Crest for 25 miles (40 km). The mountain is formed of quartz latite that erupted during the Pliocene. The mountain can be climbed as a dayhike...
plagioclase is termed a monzodiorite. The volcanic equivalent of monzonite is latite. The plagioclase in monzonite is sodium-rich, ranging from oligoclase to...
obovata. The soils it grows on are high in nutrients and include Bumbo Latite and Budgong Sandstone. As rainforests were cleared, isolated specimens were...
volcanic caldera filled with quartz latite porphyry. The ore bodies are veins and replacement zones within the quartz latite. The ore minerals are gold and...
features mainly formed during early Tertiary igneous activity when andesite, latite and rhyolite was extruded to form the Black Range and the San Mateo Mountains...
discovered, it was found as dense white masses in alternating dikes of quartz latite and quartz monzonite alongside other secondary minerals such as sphalerite...
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