Norite


Also found in: Dictionary, Wikipedia.

norite

[′nȯ‚rīt]
(petrology)
A coarse-grained plutonic rock composed principally of basic plagioclase with orthopyroxene (hypersthene) as the dominant mafic material. Also known as hypersthenfels.

Norite

 

(Norwegian norit, from Norge, “Norway”), a rock of basic composition in the gabbro group. It differs from gabbro in that it contains a rhombic pyroxene, usually bronzite but sometimes enstatite and hypersthene. When both pyroxenes are present the rock is called gabbro-norite. The remaining minerals are those in gabbro. Plagioclase with more than 50 percent anorthite predominates; olivine is often present; and various ore minerals such as magnetite, titanmagnetite, and sulfides occur as insignificant impurities. Norite typically has a low SiO2 content (45–55 percent), significant amounts of Mg and Ca (10–20 percent), and a negligible alkali content (rarely more than 2–3 percent). It is used as a building material.

References in periodicals archive ?
They covered norite and other mafic-ultramafic intrusions outside the Greenland norite belt as well as areas within the belt that required more detailed surveying.
The Muslim Bagh ophiolite gabbros include olivine gabbro, gabbro-norite, norite and hornblende gabbro.
L-D data of norite, granite, sandstone, limestone, marble, siltstone dry rock samples were used during the development and verification of the proposed research approach.
The norites and particularly the pyroxenites of these Cyclic Units are fre-quently, not to say commonly, fairly pegmatitic.
The predominantly norite rock matrix contained pyrrhotite as the major sulphide with small amounts of pentlandite [(Fe,Ni)9 S8] and chalcopyrite (CuFe[S.
The site at which the Van der Stel party excavated into the copper-stained norite is today a National Monument.
The Aguablanca stock is a small body in the northern part of the Main Santa Olalla Pluton and consists of cumulates, mainly gabbro and norite with intercalations of pyroxenite and peridotite, that grade into amphibole-biotite diorites in the core.
These geophysical targets lie beneath glacial cover, however they are within a broad area of mapped mafic and ultramafic rocks where prospecting has identified local occurrences of nickel-copper sulphide mineralization associated with norite and pyroxenite intrusions.
The P-63 target is located in the southern part of the 75-km-long by 15-km-wide Greenland norite belt along and near the southwest coast of Greenland, which is pack-ice-free year round.
publikuotas straipsnis "Jeigu norite daugiau uzdirbti, svarbiausia jusu isvaizda, o ne reputacija", kuriame buvo pristatomi Varviko universiteto mokslininko Olivola neverbalios komunikacijos pagrindu atliktu tyrimu rezultatai (2012), kuriais pabreziama, kad tyrimai atskleide, jog kuno kalba yra pagrindinis elementas, siekiant itikinti verslo partneri pasitiketi jumis (ir patiketi jums savo pinigus).
Beveik kiekvienas daugiabucio namo gyventojas gali pasakyti, kad prie namo duru yra mates tokio pobudzio skelbimus: ,,Skubiai pirksiu buta Jusu name", ,,Mano klientas iesko buto Jusu name", ,,Jeigu norite parduoti nekilnojamaji turta, galiu Jums padeti, jei neparduosiu per menesi, sumokesiu Jums 1000 Lt" ir kt.
Both the epidote amphibolite and gabbro- norite have high mechanical strength and specific gravity and low values of water absorption.