anorthosite


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anorthosite

[ə′nȯr·thə‚sīt]
(petrology)
A visibly crystalline plutonic rock composed almost entirely of plagioclase feldspar (andesine to anorthite) with minor amounts of pyroxene and olivine.
References in periodicals archive ?
The hard-rock deposit is hosted in an Archean anorthosite complex consisting of multiple layers of mafic to ultramafic rocks.
These values are associated with pyrrhotite, pentlandite and chalcopyrite mineralization found at two sites along a gabbroic anorthosite, quartzite contact;
Anorthosite is made up almost entirely of one mineral: plagioclase, which has a relatively low density.
2005, Kaolin deposits from the northern sector of Cunene Anorthosite Complex (Southern Angola).
There was some anorthosite which is white rock from the moon's highlands.
Potential non-bauxite sources for alumina in the United States might include clay, alunite, and anorthosite (Bray 2014).
The local bedrock geology consists mainly of granite and anorthosite (Wardle et al.
Mars hasn't been known to contain much of either anorthosite or granite, so either way, the findings suggest the Red Planet is more geologically interesting than before.
To the south of this tectonic contact the geology is dominated by anorthosite with subordinate gabbro belonging to the Tete Suite.