pyroxenes (commonly abbreviated Px) are a group of important rock-forming inosilicate minerals found in many igneous and metamorphic rocks. Pyroxenes...
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coarse-grained igneous rock consisting mostly of the silicate minerals olivine and pyroxene. Peridotite is ultramafic, as the rock contains less than 45% silica. It...
32 KB (3,793 words) - 16:10, 25 August 2024
The pyroxene pallasite grouplet is a subdivision of the pallasite meteorites (stony-irons). The grouplet is named "pyroxene pallasites" because they are...
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garnets, vesuvianite, diopside, tremolite, epidote, plagioclase feldspar, pyroxene and calcite. It is named after the English chemist and mineralogist William...
17 KB (1,686 words) - 14:18, 18 July 2024
each of pyroxene or hornblende. Hornblende gabbro is composed almost entirely of plagioclase and hornblende, with less than 5% each of pyroxene or olivine...
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is an ultramafic igneous rock consisting essentially of minerals of the pyroxene group, such as augite, diopside, hypersthene, bronzite or enstatite. Pyroxenites...
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mineral, i.e. porphyritic olivine (PO), porphyritic pyroxene (PP), and porphyritic olivine-pyroxene (POP). It seems likely that these chondrules cooled...
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in space; most chondrules are rich in the silicate minerals olivine and pyroxene. Chondrites also contain refractory inclusions (including Ca–Al inclusions)...
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mineralogy of pyroxene and plagioclase, etc. has altered to actinolite and saussurite (albite + epidote). The texture is distinctive, the pyroxene altered to...
9 KB (1,012 words) - 14:30, 9 January 2024
peridotite consisting mostly of the two minerals olivine and low-calcium (Ca) pyroxene (enstatite); it is named for occurrences in the Harz Mountains of Germany...
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black in colour, due to a high content of augite or other dark-coloured pyroxene minerals, but can exhibit a wide range of shading. Some basalts are quite...
70 KB (7,827 words) - 06:42, 4 October 2024
clinochlore chlorite, talc, serpentine-antigorite minerals or metamorphic pyroxene. Magnesium-rich cummingtonite can also coexist with anthophyllite. Cummingtonite...
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take down King Uchuuchouten. Chosen card battlers that each possess a pyroxene (輝石, kiseki) stone (alternatively translated as "cornerstone"). The stones...
37 KB (2,737 words) - 08:41, 24 July 2024
dark in color, and common rock-forming mafic minerals include olivine, pyroxene, amphibole, and biotite. Common mafic rocks include basalt, diabase and...
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and general characteristics they are similar to the pyroxenes. The chief differences from pyroxenes are that (i) amphiboles contain essential hydroxyl...
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double chains. The Nickel–Strunz classification is 09.D – examples include: Pyroxene group Enstatite – orthoferrosilite series Enstatite – MgSiO3 Ferrosilite...
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and aluminum spinel in the pyroxene hornfels facies. The sanidinite facies for this composition differs from the pyroxene hornfels facies only in the...
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unaltered state these are ophitic and consist of pyroxene enclosing lath-shaped plagioclase feldspars; the pyroxene is often changed to uralite. When the feldspar...
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composition of the rock. Feldspars, quartz or feldspathoids, olivines, pyroxenes, amphiboles, and micas are all important minerals in the formation of...
48 KB (5,656 words) - 02:36, 23 June 2024
change and as the magma further cools the olivine will recrystallise as pyroxene. Since the surface of the Earth is a low temperature environment compared...
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with 50% plagioclase, 40% pyroxene, 5% olivine and 5% groundmass (in essence a gabbro) would be termed a plagioclase-pyroxene adcumulate with accessory...
14 KB (1,748 words) - 19:00, 18 December 2023
of two minerals that had crystallized in the upper mantle, olivine and pyroxene, quickly settled out of the magma and collected along the base of the sills...
33 KB (4,477 words) - 19:03, 12 September 2024
group of minerals), or jadeite (a silicate of sodium and aluminum in the pyroxene group of minerals). Nephrite is typically green, although may be yellow...
38 KB (4,501 words) - 20:53, 1 November 2024
rhombohedral and basal parting in corundum, and the basal parting in pyroxenes. Cleavage is a physical property traditionally used in mineral identification...
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upon etching. Minor constituents are schreibersite, troilite, chromite, pyroxenes, and phosphates (whitlockite, stanfieldite, farringtonite, and merrillite)...
20 KB (2,486 words) - 21:36, 8 October 2024
less common anorthositic gabbro (70-80% calcic plagioclase, with minor pyroxene). The ferroan anorthosite suite is the most common group in the highlands...
34 KB (3,396 words) - 19:10, 25 October 2024
texture, and is composed predominantly of sodium-rich plagioclase plus pyroxene or hornblende. Andesite is the extrusive equivalent of plutonic diorite...
25 KB (2,760 words) - 00:21, 27 September 2024
Pyroxene (diopside) is a mineral classified as a metasilicate....
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Augite (category Pyroxene group)
Augite, also known as Augurite, is a common rock-forming pyroxene mineral with formula (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6. The crystals are monoclinic and...
5 KB (367 words) - 21:28, 11 January 2024
Lherzolite – an ultramafic and ultrabasic rock that is composed of olivine and pyroxenePages displaying wikidata descriptions as a fallback – An ultramafic rock...
14 KB (2,187 words) - 23:33, 16 April 2024