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Related to lherzolite: dunite


A type of peridotite containing both clinopyroxene and orthopyroxene, with olivine being the most abundant mineral.

[ Lherz (Lers), pond in southern France next to a massif containing the mineral + -lite.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Geological Science) mineralogy a peridotite consisting mainly of olivine, with orthopyroxene and clinopyroxene
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References in periodicals archive ?
Chaussidon and J.-P Lorand, "Sulphur isotope composition of orogenic spinel lherzolite massifs from Ariege (North-Eastern Pyrenees, France): an ion microprobe study," Geochimica et Cosmochimica Acta, vol.
(2006): Trace element partitioning between mica-and amphibole-bearing garnet lherzolite and hydrous basanitic melt: 1.
The peridotite unit rocks are the most altered part of Noorabad ophiolite including dunite, harzburgite and lherzolite. These rocks can be seen form many large and small mass of green to gray.
The foliated peridotite sequence is harzburgite-type (Nicolas, 1989) although minor lherzolite has also been reported from the basal section of the mantle sequence (Mahmood et al., 1995).
Lherzolite, harzburgite, dunite mantle xenoliths, and xenocrystic debris are common and abundant in the ankaratrites and nephelinites [54] from eastern ASV (Figure 3).
Melting of phlogopite-bearing peridotite produces potassic rather than sodic magmas, but melting of amphibole- and clinopyroxene-bearing lherzolite yields magmas with low CaO/[Al.sub.2][O.sub.3], variable Mg#s, and [K.sub.2]O/[Na.sub.2]O <1, characteristic of enriched lavas of the NE Pacific.
The dominant rock-type of the Balmuccia peridotite massif is a medium- to coarse-grained, porphyroclastic spinel lherzolite (Shervais, 1979).
Diamonds are known to occur in three peridotite subtypes: dunite (90% olivine), harzburgite (40-90% olivine, the rest orthopyroxene and garnet), and lherzolite (at least 40% olivine, with orthopyroxene and clinopyroxene in a wide range of proportions, and minor garnet).
The Precambrian Ophiolits in north of Anarak are seen underneath the Precambrian-lower Cambrian metamorphics [7] and are of Harzburgite and partly lherzolite accompanied with whom scattered masses of gabbro, Diabase, and plagiogranite are observed.
These observations and isotopic characteristics of the lavas suggest that their magmas were probably derived from partial melting of a subduction-metasomatized continental lithospheric mantle in the garnet/spinel lherzolite field [2].