Peridotite - Wikipedia
网页Peridotite (US: / ˈpɛrɪdoʊˌtaɪt, pəˈrɪdə -/ PERR-ih-doh-tyte, pə-RID-ə-) is a dense, coarse-grained igneous rock consisting mostly of the silicate minerals olivine and pyroxene. Peridotite is ultramafic, as the rock contains less than 45% silica.
Peridot - Wikipedia
网页Peridot (/ ˈpɛrɪˌdɒt, - ˌdoʊ / PERR-ih-dot, -doh), sometimes called chrysolite, is a yellow-green transparent variety of olivine. Peridot is one of the few gemstones that occur in only one color. Peridot can be found in mafic and ultramafic rocks occurring in lava and peridotite xenoliths of the mantle.
Peridotite: Igneous Rock - Pictures, Definition & More - Geology.com
网页Peridotite is a generic name used for coarse-grained, dark-colored, ultramafic igneous rocks. Peridotites usually contain olivine as their primary mineral, frequently with other mafic minerals such as pyroxenes and amphiboles. Their silica content is low compared to other igneous rocks, and they contain very little quartz and feldspar.
Peridotites: Dense, Coarse-Grained Ultramafic Intrusive Igneous …
网页2023年7月12日 · Peridotites are dense, coarse-grained, dark-colored ultramafic plutonic rocks with at least 40% olivine by volume. Members are dunite, kimberlite, harzburgite, wehrlite and lherzolite. Others are hornblende and pyroxene-hornblende peridotites. These silica-poor (< 45 wt.% SiO2) ultrabasic rocks have at least 90 vol. % mafic minerals.
Peridotite | Mantle, Igneous, Ultramafic | Britannica
网页peridotite, a coarse-grained, dark-coloured, heavy, intrusive igneous rock that contains at least 10 percent olivine, other iron- and magnesia-rich minerals (generally pyroxenes), and not more than 10 percent feldspar.
Peridotite | Properties, Composition, Formation - Geology Science
网页2023年9月4日 · Peridotite is a type of ultramafic igneous rock that is primarily composed of the mineral olivine, along with smaller amounts of other minerals such as pyroxenes and amphiboles. It is one of the main rock types found in the Earth’s mantle, which is the layer of the Earth that lies below the crust.
Peridotite - Geology 1501 - ECU
网页Olivine. Miscellaneous. Also called “Dunite”. Tectonic Environment. Upper mantle; sometimes obducted at continent-continent collision zones. East Carolina University. Department of Geological Sciences. East 5th Street Greenville, NC 27858-4353 USA. 252-328-6360 | Contact Us.
Peridotite - Igneous Rocks - Sandatlas
网页Peridotite is a dark-colored igneous rock consisting mostly of olivine and pyroxene. It is an important rock type because the Earth’s mantle is predominantly composed of it. A classification diagram of ultramafic rocks. Note that neither peridotite nor pyroxenite are single rock types. They are further divided into subtypes.
Peridotite - Encyclopedia.com
网页2018年5月8日 · Peridotite is a dark-colored, coarse-grained igneous rock believed by many scientists to be the primary rock of the exterior of Earth 's mantle. The rock typically forms in volcanic pipes and is forced to the surface from great depths during a volcanic eruption.
Peridotite - SpringerLink
网页2014年1月1日 · Peridotites are the main lithology of the Earth’s upper mantle. According to the IUGS classification (Le Bas and Streckeisen, 1991), they are defined as a coarse-grained ultramafic rock type, containing more than 40 % olivine.
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