Definitions for lherzolite

This page provides all possible meanings and translations of the word lherzolite

WiktionaryRate this definition:(0.00 / 0 votes)

  1. lherzolite(Noun)

    A dark-green igneous rock consisting largely of chrysolite, with pyroxene and picotite.

  2. Origin: From Lherz in the Pyrenées .

Webster DictionaryRate this definition:(0.00 / 0 votes)

  1. Lherzolite(noun)

    an igneous rock consisting largely of chrysolite, with pyroxene and picotite (a variety of spinel containing chromium)

  2. Origin: [From Lherz, a place in the Pyrenees + -lite.]

FreebaseRate this definition:(0.00 / 0 votes)

  1. Lherzolite

    Lherzolite is a type of ultramafic igneous rock. It is a coarse grained rock consisting of 40 to 90% olivine along with significant orthopyroxene and lesser calcic chromium rich clinopyroxene. Minor minerals include chromium and aluminium spinels and garnets. Plagioclase can occur in lherzolites and other peridotites that crystallize at relatively shallow depths. At greater depth plagioclase is unstable and is replaced by spinel. At approximately 90 km depth, pyrope garnet becomes the stable aluminous phase. Garnet lherzolite is a major constituent of the Earth's upper mantle. Lherzolite is known from the lower ultramafic part of ophiolite complexes, from alpine-type peridotite massifs, from fracture zones adjacent to mid-oceanic ridges, and as xenoliths in kimberlite pipes and alkali basalts. Partial melting of spinel lherzolite is one of the primary sources of basaltic magma. The name is derived from the Lherz Massif, an alpine peridotite complex, at Étang de Lers, near Massat in the French Pyrenees; Lherz is the archaic spelling of this location.


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