Dunite - Wikipedia
网页Dunite (/ ˈduːnaɪt, ˈdʌnaɪt /), also known as olivinite (not to be confused with the mineral olivenite), is an intrusive igneous rock of ultramafic composition and with phaneritic (coarse-grained) texture. The mineral assemblage is greater than 90% olivine, with minor amounts of other minerals such as pyroxene, chromite, magnetite, and pyrope.
Dunite | Mantle Rock, Olivine & Peridotite | Britannica
网页Dunite, light yellowish green, intrusive igneous ultramafic rock that is composed almost entirely of olivine. Dunite usually forms sills (tabular bodies intruded between other rocks) but may also occur as lenses (thin-edged strata) or pipes (funnels, more or less oval in cross section, that become
Peridotite | Properties, Composition, Formation - Geology Science
网页2023年9月4日 · Dunite: Dunite is a type of peridotite that is composed almost entirely of olivine, with little or no pyroxene or other minerals. It is an ultramafic rock with a high olivine content, and it often occurs as lenses or pockets within other peridotite rocks. Dunite is typically light green in color due to its high olivine content.
Dunite - Igneous Rocks - Sandatlas
网页Dunite is an ultramafic plutonic rock that is composed almost exclusively of olivine. “Ultramafic” means that mafic minerals form more than 90% on the rocks composition. Most common mafic minerals in ultramafic rocks are definitely pyroxenes and olivine (if hornblende is present it is added to pyroxenes).
Dunite: Formation, Composition, Properties – Geology In
网页Dunite is an intrusive igneous rock of ultramafic composition and with a phaneritic texture. Dunite, also known as olivinite, is known for its coarse-grained texture and almost exclusive composition of the mineral olivine. In fact, dunite is typically 90% or more olivine, with minor amounts of other minerals like pyroxene, chromite, magnetite ...
Dunite: A Coarse-grained, Olivine-rich Greenish Plutonic Rock
网页2023年6月25日 · Dunite is a coarse-grained, pale green to olive-green, ultramafic intrusive igneous rock with more than 90% olivine. It also may have smaller amounts of pyroxene, spinel, pyrope, chromite, and other minerals. This rock is an olivine-rich endmember of the mantle-derived peridotite rocks.
Dunite - Wikiwand / articles
网页Dunite, also known as olivinite, is an intrusive igneous rock of ultramafic composition and with phaneritic (coarse-grained) texture. The mineral assemblage is greater than 90% olivine, with minor amounts of other minerals such …
Dunite Rock Composition and Uses | Earth Know
网页2024年3月21日 · Dunite is an ultramafic plutonic or intrusive igneous rock in which olivine exceeds 90% by volume. Ultramafic means it has at least 90% mafic minerals. Mafic minerals are dark minerals rich in iron and magnesium.
Dunite - Natural Atlas
网页Dunite (also known as olivinite, not to be confused with the mineral olivenite) is an igneous, plutonic rock, of ultramafic composition, with coarse-grained or phaneritic texture. The mineral assemblage is greater than 90% olivine, with minor amounts of other minerals such as pyroxene, chromite,…
Depth-dependent peridotite-melt interaction and the origin of ... - Nature
网页2021年2月17日 · Several geochemical and petrographic observations are consistent with a melt-rock reaction origin for some cratonic dunites: the forsterite contents of olivines from Wiedemann Fjord dunites have...