Journal ArticleDOI
Rare-earth abundances in chondritic meteorites
TLDR
In this article, 15 chondrites, including eight carbonaceous chondites, were analyzed for rare earth element abundances by isotope dilution, and the persistence of anomalies in chondritic materials relatively removed from direct condensational processes implies that anomalous components were introduced at a late stage of chondrite formation.About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 1978-08-01. It has received 1346 citations till now. The article focuses on the topics: Chondrule & Chondrite.read more
Citations
More filters
Journal ArticleDOI
A tectônica extensional paleoproterozóica na borda sudeste do craton são francisco (se, brasil): geoquímica e petrologia das metaígneas.
TL;DR: In this paper, the authors present an assembly of geological, geochemical and petrological data concerning different episodes of magmatism related to Espinhaco Basin evolution in the central part of Minas Gerais State, witha goal to understand aspects of paleoproterozoic crust and tensional tectonic.
Dissertation
Structure et géochimie d'un leucogranite en régime de collision continentale : l'exemple du massif de Gangotri-Badrinath (Himalaya du Garhwal)
TL;DR: Le granite of Gangotri-badrinath, localised au Garhwal (Indes) appartient a la ceinture des granites du Haut Himalaya as discussed by the authors, caracterises par une filialite plus ou moins marquee and par une lineation a tourmaline, tous deux d'origine magmatique.
Anfibolitas proterozoicas del sector central de la zona de Ossa Morena. Geoquímicas e implicaciones geodinámicas
TL;DR: In this article, anfibolitas in the region central de la Ossa-Morena region of Chile were investigated. Andres et al. present a metamorfismo regional progresivo that varía desde el grado bajo-muy bajo hasta muy alto in el núcleo migmático de Monesterio, caracterizado by gradientes de altas temperaturas and bajas presiones.
Journal ArticleDOI
U-minerals and ree distribution, paragenesis and provenance, um bogma formation southwestern sinai, egypt
TL;DR: The U-minerals found within these facies include U-oxides, U-silicates and Uranyl-Oxyhydroxides, -silicates, -phosphates, arsenates, -vanadate-, -molybadate, -carbonates and-sulphate complexes as mentioned in this paper.
Journal ArticleDOI
1.88 Ga São Gabriel AMCG association in the southernmost Uatumã-Anauá Domain: Petrological implications for post-collisional A-type magmatism in the Amazonian Craton
Cristóvão da Silva Valério,Moacir José Buenano Macambira,Valmir da Silva Souza,Elton Luiz Dantas,Lauro Valentim Stoll Nardi +4 more
TL;DR: In this article, a 1.89-1.87-Ga volcano-plutonic system integrated to the Sao Gabriel AMCG association has been investigated in the Uatuma-Anaua Domain of Brazil.
References
More filters
Book
Advanced Inorganic Chemistry
TL;DR: Cotton and Wilkinson's Advanced Inorganic Chemistry (AIC) as discussed by the authors is one of the most widely used inorganic chemistry books and has been used for more than a quarter century.
Journal ArticleDOI
Synthesis of the Elements in Stars
TL;DR: In this article, a count of the stable and radioactive elements and isotopes is given, and Table I,1 shows that only promethium has not been found in nature, whereas 99 elements are found terrestrially and technetium is found in stars.
Journal ArticleDOI
Determination of REE, Ba, Fe, Mg, Na and K in carbonaceous and ordinary chondrites
TL;DR: In this paper, the exact determination of REE and Ba abundances in three carbonaceous (Orgueil Cl, Murchison C2 and Allende C3) and seven olivine-bronzite chondrites were carried out by mass spectrometric isotope dilution technique.
Journal ArticleDOI
A chemical-petrologic classification for the chondritic meteorites.
W. R. Van Schmus,John A. Wood +1 more
TL;DR: In this article, a two-dimensional classification grid based on chemical and petrologic subdivisions of chondritic meteorites is proposed, which extends the current chemical subdivisions to account for varying petrolic (implied metamorphic) properties within the primary chemical groups.