| 词条 | Latite |
| 释义 |
|name=Latite |type=Volcanic |image=Latit - Boxberg, Hocheifel.jpg |image caption= Latite from Boxberg, High-Eifel, Germany }} 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. 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[2] and as intrusive laccoliths and sills in South Dakota, USA.[3] See also
References1. ^Classification of Igneous Rocks {{webarchive|url=https://web.archive.org/web/20110930102012/http://geology.csupomona.edu/alert/igneous/igclass.htm |date=2011-09-30 }} {{Volcanoes}}{{Volcanology-stub}}{{Petrology-stub}}2. ^{{cite journal | url=http://adsabs.harvard.edu/full/2001CRABS..54c..63G | title=Volcanism in the Momchilgrad Volcanotectonic Depression |author1=Georgiev, V. |author2=Milovanov, P. | journal=Comptes rendus de l'Académie bulgare des Sciences | year=2001 | volume=54 | issue=3 | pages=63–66 | bibcode=2001CRABS..54c..63G}} Retrieved on 5 July 2015. 3. ^{{cite web | url=http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=SDTl%3B0 | title=Latitic Intrusive Rocks | publisher=USGS | accessdate=5 July 2015}} 3 : Volcanology|Volcanic rocks|Subvolcanic rocks |
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