Mineralogically, a rock composed mostly of the anorthite is called an anorthosite, and most rocks of the lunar highlands are, in fact, anorthosites. Lunar scientists often refer to the highlands crust as “feldspathic,” indicating the major mineral, or “anorthositic,” indicating the major rock type.

Anorthosites occur as fragments or inclusions of widely varying size and shape in many other igneous rock types, ranging in composition from granite to basalt to kimberlite.

Anorthosite - A core 3.5cm wide of the rock type called "anorthosite", which are composed mostly of calcic plagioclase with also some mafic rock. A considerable amount of rocks brought back by the Apollo missions were anorthosite. It is not a common rock type and is found in few places on Earth, but common on the Moon's surface. . This and many more mineral specimens are available for sale at Despite their similar ages, each of the LAC anorthosite plutons displays a distinctive assemblage of minerals. The Poe Mountain anorthosite is characterized by olivine, augite, low Ca-pyroxene, ilmenite and magnetite, and plagioclase in the range An43–53.

Anorthosite minerals

▫ 3 Highlights from quartz and rutile 1 Dec 2010 Buddington (1939) classified the Adirondack anorthosites on their plagioclase to mafic mineral content as anorthosite (>90% plagioclase and <10 2 Mar 2020 The magmatic minerals are stored at great depth in the Earth and are is anorthosite – a magmatic rock that is made up of only one mineral 29 Sep 2000 The rock anorthosite is named after the mineral anorthite - Calcium rich plagioclase. Anorthosite occasionally has pyroxene associated with it, 23 Aug 2019 granulite facies anorthosite that lead to grain-size reduction and growth of relatively weak minerals, Adirondacks, New York. (A) Amphibole + L. D. Ashwal, 1993. Anorthosites. Minerals and Rocks Series Volume 21. xix + 422 pp.

Anorthite belongs to the Plagioclase Feldspar group, an isomorphous solid solution series. Albite is one end member, containing sodium and no calcium. The other end member, Anorthite, contains calcium and no sodium. The intermediary members are Oligoclase, Andesine, Labradorite, and Bytownite.

Anorthite. Wenk H R, Joswig W, Tagai T, Korekawa M, Smith B K (1980) The average structure of An 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. Anorthite belongs to the Plagioclase Feldspar group, an isomorphous solid solution series.

all minerals gemstones by class etc. rocks igneous andesite anorthosite basalt carbonatite dacite diorite dunite gabbro granite kimberlite komatiite lamprophyres monzonite obsidian pegmatite peridotite pumice pyroxenite rhyolite scoria syenite metamorphic gneiss marble …

Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P 1 ,I 1. X Ray Diffraction: Anorthosite, (not to be confused with one of its constituents Anorthite) can also be known as Northosite or Mystery Stone is an intrusive igneous rock predominately Plagioclase Feldspar with phaneritic or large sized matrix grains. Anorthosite is an almost monomineralic, feldspathic rock with a great variety of industrial applications (Table 1). Anorthosite massifs are known to host important ore depos-its such as ilmenite and are, in many cases, excellent sources for high-quality rock aggregate and also for dimension-stone. The exploitation of anorthosite for industrial mineral Anorthosite is by definition an igneous rock consisting of 90-100% plagioclase feldspar.

Se hela listan på geology.fandom.com Anorthite Crystallography. Axial Ratios: a:b:c =0.635:1:1.1003. Cell Dimensions: a = 8.177, b = 12.877, c = 14.169, Z = 8; alpha = 93.166°, beta = 115.85°, gamma = 91.216° V = 1,340.29 Den (Calc)= 2.75. Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P 1 ,I 1. X Ray Diffraction: Anorthosite, (not to be confused with one of its constituents Anorthite) can also be known as Northosite or Mystery Stone is an intrusive igneous rock predominately Plagioclase Feldspar with phaneritic or large sized matrix grains. Anorthosite is an almost monomineralic, feldspathic rock with a great variety of industrial applications (Table 1). Anorthosite massifs are known to host important ore depos-its such as ilmenite and are, in many cases, excellent sources for high-quality rock aggregate and also for dimension-stone.
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Moh's Scale of Hardness · 1. Talc · 2.

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Anorthosite is by definition an igneous rock consisting of 90-100% plagioclase feldspar. When the amount of mafic minerals exceeds 10 % the name leucogabbro or anorthositic gabbro (alternatively -norite) is commonly used, depending on the nature of the pyroxene.

The mafic mineral in Proterozoic anorthosite may be clinopyroxene, orthopyroxene, olivine, or, more rarely, amphibole. Oxides , such as magnetite or ilmenite, are also common. Most anorthosite plutons are very coarse grained; that is, the individual plagioclase crystals and the accompanying mafic mineral are more than a few centimetres long. anorthosites and associated rocks from eight Proterozoic massif anorthosite complexes of India, North America and Norway indicates marked similarities in mineralogy and chemistry among similar rock types. The anorthosite and maﬁc-leucomaﬁc rocks (e.g., leuconorite, leucogabbro, The rock type of Dushan jade belongs to zoisitized anorthosite. Anorthite, the major mineral of Philippines rock, belongs to the plagioclase isomorphous series.

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Anorthite in Thin Section. Thin Section GigaPans.

Mines across the United States churn out all kinds of minerals, from potash to iron to gold. But the ground around a mine in southern Montana contains a mineral that is a bit more valuable—at least to the scientists who use it to study the Moon. On August 10, 2018, Operational Land Imager December 23, 2014 New 2016 reference added. Moon's Pink Mineral--- Remote sensing detections of pink spinel anorthosite are compared with sample analyses … AlSiCal-Towards a greener mineral and metal industry in Europe A new European project is funded by the EUs H2020 programme. The AlSiCal project aims at developing an innovative technology to reduce the environmental impact of producing alumina, silica and calcium carbonate by using alternative mineral … Mafic minerals. Anorthosite / ænˈɔːrθəsaɪt / 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.