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
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Book ChapterDOI
Solar System Abundances of the Elements
TL;DR: In this article, the chemical elements for use as a solar abundance standard in astronomical and planetary studies are summarized and updated abundance tables for solar system abundances based on meteorites and photospheric measurements are presented.
Journal ArticleDOI
Zircon U–Pb geochronology of Ordovician magmatism in the polycyclic Ruitor Massif (Internal W Alps)
TL;DR: Among the Middle Penninic basements of the Internal NW-Alps, the Ruitor massif shows the best pre-served remnants of pre-Permian metamorphic rocks.
Journal ArticleDOI
The Lappajärvi meteorite crater, Finland: petrography, Rb-Sr, major and trace element geochemistry of the impact melt and basement rocks
TL;DR: In this paper, the chemical and isotopic properties of the Lappajarvi meteorite impact body were studied in detail to identify and characterize different impact melt types (clast-poor, clast-rich, suevitic melt) and study their chemical (major and trace elements) and isotope (Rb-Sr) compositions in comparison to the composition of the target rocks.
Journal ArticleDOI
Geochemical evolution of a lateritic Sn–Zr–Th–Nb–Y–REE-bearing ore body derived from apogranite: the case of Pitinga, Amazonas — Brazil
TL;DR: The Pitinga region, located 250 km from Manaus in the Amazonas State, northern Brazil, contains primary and supergene mineralization of Sn, Zr, Th, Nb, Y and REE as discussed by the authors.
Journal ArticleDOI
Apatite nodules as an indicator of depositional environment and ore genesis for the Mesoproterozoic Broken Hill-type Gamsberg Zn–Pb deposit, Namaqua Province, South Africa
Marcel Stalder,A. Rozendaal +1 more
TL;DR: In this paper, a genetic model for the deposition of the sulfide ore and associated iron formations is proposed, which predicts a separation of the depositional basin into oxygen-deficient basin facies and oxygenated shelf facies which are composed of manganiferous iron formations.
References
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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.