Journal ArticleDOI
Cerium anomalies in lateritic profiles
Jean-Jacques Braun,Maurice Pagel,Jean-Pierre Muller,Paul Bilong,Annie Michard,Bernard Guillet +5 more
TLDR
In this article, the geochemistry and mineralogy have been studied in four lateritic profiles, one derived from a syenite (Akongo, SW Cameroon), the others being developed on a gneissic basement and located along a soil toposequence (Goyoum, E Cameroon).About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 1990-03-01. It has received 533 citations till now. The article focuses on the topics: Saprolite & Allanite.read more
Citations
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Iron Formation: The Sedimentary Product of a Complex Interplay among Mantle, Tectonic, Oceanic, and Biospheric Processes
Andrey Bekker,Bryan Krapež,John F. Slack,Noah J. Planavsky,Axel Hofmann,Kurt O. Konhauser,Olivier Rouxel +6 more
TL;DR: In this article, it was shown that occurrences of BIF, GIF, Pherozoic ironstones, and exhalites surrounding VMS systems are linked to diverse environmental changes.
Journal ArticleDOI
Scavenging of dissolved yttrium and rare earths by precipitating iron oxyhydroxide: experimental evidence for Ce oxidation, Y-Ho fractionation, and lanthanide tetrad effect
TL;DR: In this paper, an experimental verification of a natural process that may produce the lanthanide tetrad effect in geological samples was performed at pH 3.6 to 6.2 with synthetic solutions containing dissolved Fe (≈7 mg/L), rare earths and Yttrium (ΣREY: ≈61 μg/L).
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Geochemical characterization of the Luochuan loess-paleosol sequence, China, and paleoclimatic implications
TL;DR: In this paper, chemical (major and trace element) and isotopic (Sr, Nd) analyses of the Luochuan loess-paleosol sequence in China were performed in order to examine the following problems: (1) potential source heterogeneity; (2) element behavior during pedogenesis; (3) paleoclimatic implications; and (4) the use of loess data to determine the average composition of the upper continental crust.
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The Aquatic Chemistry of Rare Earth Elements in Rivers and Estuaries
TL;DR: In this article, a comparison of field and laboratory experiments highlights key features of rare earth element fractionation in major river systems is presented, showing that the dissolved pool of both rivers is highly HREE enriched with respect to the REE composition of their suspended particles.
Journal ArticleDOI
REE fractionation during granite weathering and removal by waters and suspended loads: Sr and Nd isotopic evidence
TL;DR: In this article, ICP-MS and TIMS measurements were performed on both solid samples (fresh granite, soil, and suspended load of the stream) and waters (soil solutions, springwater, and streamwater) to determine their respective REE concentrations and Sr and Nd isotopic compositions.
References
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Book
Solutions, Minerals and Equilibria
Robert M. Garrels,C. L. Christ +1 more
TL;DR: In this article, the authors provide a thorough, up-to-date coverage of controls on the chemical quality of surface and ocean waters. But they do not provide a detailed analysis of the results of their experiments.
Book
Selected values of chemical thermodynamic properties
TL;DR: The Selected Values of Chemical Thermodynamic Properties as mentioned in this paper, published by the National Bureau of Standards (NBS) in 1952, is a seminal work in the field of thermodynamics.
Journal ArticleDOI
Mobility and fractionation of rare earth elements during weathering of a granodiorite
TL;DR: The rare earth elements (REE) have been mobilised and fractionated during supracrustal alteration of the Torrongo granodiorite as mentioned in this paper, and the residual products are especially depleted in the heavy REE.
Journal ArticleDOI
An in situ sampler for close interval pore water studies1
TL;DR: A sampler for defining compositional changes over distances on the order of 1 cm in aqueous systems operates by equilibration of water contained by a dialysis membrane with the surrounding water.
Journal ArticleDOI
Rare-earth elements and uranium in high-temperature solutions from East Pacific Rise hydrothermal vent field (13 °N)
TL;DR: The mobility of rare-earth elements (REE) and U during hydrothermal alteration of the basalts at spreading centres has long been a matter of concern because of its bearing on the evolution and recycling of the oceanic crust.