How dense is dunite?

How dense is dunite?

The dunite, initial density of 3.25 g/cc, was com pressed to a density of about 4.9 g/cc at 720 kilobars.

What is dunite rock?

Dunite is an igneous plutonic rock of ultramafic composition with coarse-grained granular or phaneritic texture and often massive or layered.

What are the characteristics of dunite?

Peridotite is a very dense, coarse-grained, olivine-rich, ultra- mafic intrusive rock. It is noted for its low silica content, and contains very little or no feldspar ( orthoclase, plagioclase). It is a common component of oceanic lithosphere, and is derived from the upper mantle.

What is the primary mineral in dunite?

In 1859 the Austrian geologist Ferdinand von Hochstetter discovered that the mountain was made of dense igneous rock, composed chiefly of two minerals olivine and chromite. This unusual rock he named dunite, a name since applied to rocks of this type throughout the world.

What is the color of dunite?

Dunite, light yellowish green, intrusive igneous ultramafic rock that is composed almost entirely of olivine.

Is dunite volcanic or plutonic?

Dunite (/ˈduːˌnaɪt, ˈdʌnˌaɪt/) (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.

How is dunite formed?

Cumulative dunite is formed by fractionation of olivine from a mafic melt. Replacive dunite is a product of the reaction between a pyroxene-bearing host rock and an olivine-saturated magma, which dissolves orthopyroxene in the host peridotite and sometimes crystallizes olivine.

Why is Dunite green?

This color results from surface weathering that oxidizes the iron in olivine in temperate climates (weathering in tropical climates creates a deep red soil). The Dunite from Dun Mountain is part of the ultramfic section of the Dun Mountain Ophiolite Belt.

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