Anorthosite - Wikipedia
Anorthosite (/ ə ˈ n ɔːr θ ə s aɪ t /) is a phaneritic, intrusive igneous rock characterized by its composition: mostly plagioclase feldspar (90–100%), with a minimal mafic component (0–10%). Pyroxene, ilmenite, magnetite, and olivine are the mafic minerals most commonly present.
Anorthosite : Properties, Formation, Occurrence and Uses
Aug 26, 2023 · Anorthosite is a type of igneous rock that is primarily composed of a mineral called plagioclase feldspar. It is known for its distinctive light-colored appearance, often characterized by a white to light gray coloration.
Anorthosite | Igneous, Plutonic, Mafic | Britannica
anorthosite, type of intrusive igneous rock composed predominantly of calcium-rich plagioclase feldspar. All anorthosites found on Earth consist of coarse crystals, but some samples of the rock taken from the Moon are finely crystalline.
Anorthosite: Mineral information, data and localities. - mindat.org
About Anorthosite Hide. A coarse-grained crystalline rock consisting mostly of calcic plagioclase (>90%, usually labradorite) with <10% mafics. The mafic mineral may be clinopyroxene, orthopyroxene, olivine, or, more rarely, amphibole. Oxides, mostly magnetite or …
Genesis Rock - NASA Science
That sample, nicknamed the Genesis Rock, sample number 15415, was an anorthosite, a piece of the moon’s primordial crust. Geologists, hoping to learn more about the moon and its origins, selected the Hadley-Apennines landing site for precisely this reason.
Anorthosite - an overview | ScienceDirect Topics
Anorthosite is an igneous rock and has been defined based on its content of more than 90% plagioclase feldspar (Streckeisen, 1976). It has a minimal mafic component (0–10 wt.%) of pyroxene, ilmenite [Fe 2+ TiO 3 ], magnetite, and olivine.
Anorthosite - SpringerLink
Anorthosite is a coarse-grained rock composed essentially of plagioclase feldspar in the range andesine to anorthite. The term was coined by T. S. Hunt in 1863 to apply to rocks composed of “anorthose” feldspars, an obsolete term for triclinic feldspars.
Anorthosite and labradorescence - Sandatlas
Anorthosite is an igneous monomineralic rock that is composed of plagioclase feldspar (over 90% of the rock is composed of this mineral). Plagioclase is a very common mineral group, more than half of the Earth’s crust is composed of it.
Anorthosites and Komatiites | SpringerLink
Jan 1, 2013 · Here we expand our knowledge about anorthosite by learning more about the petrography, mineralogy, and chemical composition of this rock, and about the differences between the Archean and Proterozoic anorthosites.
Anorthosite - ALEX STREKEISEN
Anorthosite: Anorthosite: A leucocratic coarse-grained plutonic rock consisting essentially of plagioclase (usually labradorite or bytownite) often with small amounts of pyroxene. Olivine, amphibole, ilmenite, magnetite, and spinel are also sometimes present.