What is the mineral composition of peridotite?

What is the mineral composition of peridotite?

Peridotite

Type	Igneous Rock
Chemical Composition	Ultramafic
Color	Dark Gray to Black
Mineral Composition	Pyroxene (Bronzite), Olivine
Tectonic Environment	Upper mantle; sometimes obducted at continent-continent collision zones

How do you identify peridotite?

Classic peridotite is bright green with some specks of black, although most hand samples tend to be darker green. Peridotitic outcrops typically range from earthy bright yellow to dark green; this is because olivine is easily weathered to iddingsite.

What are the uses of peridotite?

Peridotites are economically important rocks because they often contain chromite – the only ore of chromium; they can be source rocks for diamonds; and, they have the potential to be used as a material for sequestering carbon dioxide. Much of Earth’s mantle is believed to be composed of peridotite.

What is the cooling rate of peridotite?

Published studies demonstrate cooling rates for the Iwanaidake peridotites to be on the order of 10−4–10−1 °C/yr, while, for extrusive rocks such as picrites, cooling rates are estimated at 103 to 104 °C/yr [9].

Is basalt a sedimentary?

Basalt is not a sedimentary rock. It is actually an igneous rock formed from cooled, melted rocks.

Is basalt igneous sedimentary or metamorphic?

igneous rock
What is Basalt? Basalt is a dark-colored, fine-grained, igneous rock composed mainly of plagioclase and pyroxene minerals. It most commonly forms as an extrusive rock, such as a lava flow, but can also form in small intrusive bodies, such as an igneous dike or a thin sill. It has a composition similar to gabbro.

How dense is basalt?

2.8–3.0
Rock Densities

Rock	Density
Basalt	2.8–3.0
Coal	1.1–1.4
Diabase	2.6–3.0
Diorite	2.8–3.0

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