Dunite is the olivine-rich endmember of the peridotite group of mantle-derived rocks. Dunite and other peridotite rocks are considered the major constituents of the Earth's mantle above a depth of about 400 km (250 mi).

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.

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 …

Jun 25, 2023 · 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 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).

Mar 21, 2024 · 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. On the other hand, plutonic or intrusive means it formed deep in the Earth’s crust.

Mar 23, 2025 · Dunite, often overlooked, holds a treasure trove of fascinating facts. This greenish rock, rich in olivine, plays a crucial role in Earth's mantle dynamics. Its unique composition makes it a key player in understanding geological processes.

Dunite is an igneous rock, meaning it was formed through the cooling and solidification of magma or lava. It is lithologically classified as an ultramafic rock because it is more than 90% mafic minerals by volume.

A dunite is an ultrabasic igneous rock dominated by essential olivine (>90% volume), often with accessory clinopyroxene, orthopyroxene, spinel, ilmenite, and magnetite. Dunite is usually coarse- to medium grained and is a peridotite.

Nov 13, 2015 · Dunite is an intrusive igneous rock that dominantly consists of coarse grains of the pale green mineral olivine. When the rock weathers, however, it typically appears a dull yellowish brown color often referred to as dun.