eclogite


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Related to eclogite: Blueschist, granulite, Greenschist

ec·lo·gite

 (ĕk′lə-jīt′)
n.
A coarse-grained greenish rock consisting primarily of garnet and sodic pyroxene, and often including quartz, kyanite, and rutile.

[French éclogite, from Greek eklogē, selection (because the minerals it contains are not usually found together); see eclogue.]

eclogite

(ˈɛkləˌdʒaɪt)
n
(Geological Science) a rare coarse-grained basic rock consisting principally of garnet and pyroxene. Quartz, feldspar, etc, may also be present. It is thought to originate by metamorphism or igneous crystallization at extremely high pressure
[C19: from Greek eklogē a selection]
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References in periodicals archive ?
As the oceanic crust subducts, it experiences a very high pressure but relatively low temperature style of regional metamorphism, and the basalt and gabbro are transformed to blueschist (or glaucophane schist) and then to eclogite (Figure 5).
'There are a lot of interesting geological spots in Oman such as the grand canyon in Jebel Shams, pillow lavas in Wadi al Jizi, eclogite in Sifah beach, Wadi al Maih and Bimmah sinkhole.'
The study titled, "Multidisciplinary Constraints on the Abundance of Diamond and Eclogite in the Cratonic Lithosphere," was published June 19 in the (https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GC007534) journal Geochemistry, Geophysics, Geosystems.
They found that the best explanation for the speeds actually observed underground versus those predicted in their virtual rock models was that 1 to 2 percent of the roots of the cratons was made up of diamonds, while the rest was made up of peridotite (the main type of rock in Earth's upper mantle) and a little bit of eclogite rocks (from the ocean's crust).
Petrology and geochemistry of the lawsonite (pseudomorph)-bearing eclogite in Yuka terrane, North Qaidam UHPM belt: An eclogite facies metamorphosed oceanic slice.
Their topics include probing crustal thickness evolution and geodynamic processes in the past from magma records: an integrated approach, the exhumation of Western Alboran peridotites in an Oligocene-Miocene oblique continental rift system, crust-mantle boundary in eastern North America from the (oldest) craton to the (youngest) rift, the role of percolating melts in Antarctic subcontinental lithosphere mantle: new insights from Handler Ridge mantle xenoliths in northern Victoria Land, and detrital zircon evidence for eclogite formation by basal subduction erosion: an example from the Yukon-Tanana composite arc in the Canadian Cordillera.
At the earliest, Adakite refers to the intermediate-acidic igneous rock with unique geochemical characteristics, which is formed by young subducting oceanic crust melting under eclogite facies condition.
A sample of eclogite (ARQ-359) from the Arquia Complex in the area of interest was selected for Lu-Hf garnet geochronology, with multiple garnet and whole-rock fractions, each consisting of 200-250 mg of material, which were dissolved in the radiogenic isotope clean laboratory at Washington State University according to the standard protocol described by Nesheim et al.
It is widely accepted that TTG magmas were created by the partial melting of hydrous metabasaltic rocks transformed into garnet-bearing amphibolite or eclogite, under a variety of fluid conditions (Sen & Dunn 1994; Zamora 2000).
3-D X-ray tomography of diamondiferous mantle eclogite xenoliths, Siberia: A review.
It may form carbonate eclogite in the upper mantle and carbonate garnetite in the transition zone and uppermost lower mantle.