anorthosite


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anorthosite

[ə′nȯr·thə‚sīt]
(petrology)
A visibly crystalline plutonic rock composed almost entirely of plagioclase feldspar (andesine to anorthite) with minor amounts of pyroxene and olivine.
References in periodicals archive ?
In decades preceding the idea that plagioclase accumulation and crystallization could occur al separate places in the lithosphere, petrogenetic models for massif-type anorthosite favoured an in situ origin similar to those currently accepted for layered intrusive (and other) anorthosite.
The undisclosed company has expressed interest in using Foleyet anorthosite in its production plants.
The cumulate nature of the anorthosite of the Riga batholith is supported by its low total REE content and a Eu maximum (Fig.
The West Moose River anorthosites, Avalon zone, Nova Scotia.
The 10-acre quarry where Pacific Industrial Minerals owner John Heter intends to extract 150,000 tons of anorthosite annually for 20 years is on a 320-acre claim 10 miles east of the city.
Phenocryst-matrix partitioning coefficients for K, Rb, Sr and Ba with applications to anorthosite and basalt genesis.
Processing of the mineral - anorthosite - will be done on site.
Rock types sampled in the Duck Lake Pluton include gabbro, orthopyroxene gabbro, gabbronorite, olivine gabbronorite, anorthosite, dunite, and wehrlite (Grammatikopoulos 1992; White 1996).
Forest Service's local station, the project includes mining 150,000 tons per year of anorthosite ore, a rock mineral that is used to bind concrete for building.
1999, Paleomagnetism, anisotropy of magnetic susceptibility, and argon-argon geochronology of the Clearwater anorthosite, Saskatchewan, Canada: Tectonophysics, v.
Eight drill holes totaling 896 meters targeted nickel and copper mineralization related to late-stage enrichment of an anorthosite host.
As revealed by the drill core, the complex consists of interlayered coarse-grained anorthosite and gabbro, both intruded by abundant finer grained gabbroic dykes.