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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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive
The lighter highland rocks are calcium-rich, metal-poor anorthosites, the original lunar crust.
The new analysis of ferroan anorthosite (FAN) moonrock samples is published today in the journal Nature.
(165) Data from the Orbiter showed that the lunar highlands have more variation in their chemical composition than previously thought, and detected minerals richer in sodium than the typical anorthosite crust.
M2 EQUITYBITES-30 April 2010-Nordic Mining agrees on anorthosite development with partner(C)2010 M2 COMMUNICATIONS http://www.m2.com
NORDIC BUSINESS REPORT-30 April 2010-Nordic Mining agrees on anorthosite development with partner(C)1994-2010 M2 COMMUNICATIONS http://www.m2.com
Several regions of the world with similar rapakivi-like granites have formed during crustal extension where crustal rocks are believed to have been mixed with magma from below, resulting in the formation of anorthosite and granite (Lyckberg, 2009).
Just like the rocks on Earth, Moon's have lots of basalt and olivine, pyroxene, and mafic breccias, along with plagioclase feldspar, also known as anorthosite. The crew of Apollo 11 even found an entirely new mineral at Tranquility Base during their 1969 visit - dubbed armalcolite in honor of astronauts Neil Armstrong, Buzz Aldrin and Michael Collins.
The use of this technology has been assessed with two minerals, anorthosite (a calcium alumino-silicate) and jotunite (an iron-rich basalt).
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