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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Geochemistry and petrogenesis of late Ediacaran (605-580 Ma) post-collisional alkaline rocks from the Katherina ring complex, south Sinai, Egypt
TL;DR: The Katherina ring complex (KRC) as mentioned in this paper is a typical ring complex of late Neoproterozoic age (605-580 ǫ) which was developed during the final tectono-magmatic stage of the north Arabian-Nubian Shield (ANS) during evolution of the Pan-African crust.
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Assessment of rare earth elements, Th and U profile of a site for a potential coal based power plant by instrumental neutron activation analysis
Rahat Khan,Md. Shohel Parvez,Md. Shohel Parvez,Umma Tamim,Sopan Das,M. A. Islam,Kamrun Naher,Md. Harunor Rashid Khan,F. Nahid,Syed Mohammod Hossain +9 more
TL;DR: In this article, the compositional trends of rare earth elements (REEs: La, Ce, Nd, Sm, Eu, Tb, Dy, Yb, Lu), Th and U in soil samples collected from a site for a potential coal-based power plant as well as to conduct a preliminary assessment of environmental impact of the proposed power plant in terms of REEs, Th, and U, have analyzed nine soil samples by instrumental neutron activation analysis.
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Summary statistics in geochemistry: A study of the performance of robust estimates
TL;DR: In this paper, the authors show that robust estimates of geochemical data should always include at least the simple median and hinge width, to complement the often misleading mean and standard deviation.
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Geochemistry of a Silurian metabentonite and associated apatite from the North Esk Inlier, Pentland Hills
TL;DR: In this paper, geochemical data were presented for an important metabentonite horizon within the Upper Llandovery and early Wenlock succession of the North Esk Inlier of the Pentland Hills.
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Characterization and differentiation of rock varnish types from different environments by microanalytical techniques
Dorothea S. Macholdt,Klaus Peter Jochum,Christopher Pöhlker,Andrea M. Arangio,Jan-David Förster,Brigitte Stoll,Ulrike Weis,Bettina Weber,Maren Müller,Michael Kappl,Manabu Shiraiwa,A. L. D. Kilcoyne,Markus Weigand,Denis Scholz,Gerald H. Haug,Abdullah Al-Amri,Meinrat O. Andreae +16 more
TL;DR: In this article, a broad range of micro-analytical techniques were selected to address the challenges posed by the chemical and structural complexity within the micrometer-to-nanometer-sized structures in these geological materials.
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.
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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.
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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.