Journal ArticleDOI
Riverine evidence for a fractionated reservoir of Ca and Mg on the continents: Implications for the oceanic Ca cycle
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In this paper, the authors analyzed river water, rock, travertine and soil from the high altitude, negligible vegetation setting of the Southern Tibetan Plateau and demonstrated that Ca and Mg isotope ratios are fractionated during weathering.About:
This article is published in Earth and Planetary Science Letters.The article was published on 2006-07-30. It has received 287 citations till now. The article focuses on the topics: Dissolved load & Carbonate.read more
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Boron and magnesium isotopic composition of seawater
TL;DR: The isotopic composition of seawater for both elements plays a central role in these studies and is an important interlaboratory standard as mentioned in this paper, but no systematic studies currently exist.
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The magnesium isotope budget of the modern ocean: Constraints from riverine magnesium isotope ratios
TL;DR: The authors measured the magnesium isotope ratios in 45 rivers including 16 of the largest rivers in the world, covering a range of geologic, tectonic and climatic drainage basin environments.
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Geochemistry of the dissolved load of the Changjiang Basin rivers: Anthropogenic impacts and chemical weathering
TL;DR: In this paper, the chemical and isotopic compositions of the dissolved load of the rivers of the Changjiang Basin, one of the largest riverine systems in the world, were analyzed.
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Magnesium Isotope Geochemistry
TL;DR: Magnesium has three stable isotopes, with mass numbers of 24, 25 and 26, and typical abundances of 78.305 (CIAAW 2015), and many previous Mg isotopic studies have concentrated on either mass independent isotope anomalies to look for the radiogenic 26Mg produced by the decay of short-lived 26Al (Gray and Compston 1974; Lee and … as mentioned in this paper ).
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Variations of Li and Mg isotope ratios in bulk chondrites and mantle xenoliths
Philip A.E. Pogge von Strandmann,Tim Elliott,Horst R. Marschall,Horst R. Marschall,Christopher D. Coath,Yi-Jen Lai,A. Jeffcoate,Dmitri A. Ionov +7 more
TL;DR: In this article, the authors present whole rock Li and Mg isotope analyses of 33 ultramafic xenoliths from the terrestrial mantle, which they compare with analyses of 30 (mostly chondritic) meteorites.
References
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The geochemistry of natural waters
TL;DR: The Hydrologic Cycle and Chemical Background of Natural Waters as mentioned in this paper, the Carbonate System and pH Control 5 Clay Minerals and Ion Exchange 6 Stability Relationships and Silicate Equilibria 7 Kinetics 8 Weathering and Water Chemistry, I: Principles 9 Water Chemistry Chemistry, II: Examples 10 Acid Deposition and Surface Water Chemistry 11 Evaporation and Saline Waters 12 The Oceans 13 Redox Eilibria 14 Redox Conditions in Natural Waters 15 Trace Elements 16 Mathematical and Numerical Models 17 Isotopes Appendices
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Global silicate weathering and CO2 consumption rates deduced from the chemistry of large rivers
TL;DR: In this article, newly compiled data on the 60 largest rivers of the world are used to calculate the contribution of main lithologies, rain and atmosphere to river dissolved loads, and the relationship between the chemical weathering rates of silicates and the possible controlling parameters are explored.
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Least squares fitting of a straight line with correlated errors
TL;DR: In this paper, the fitting of a straight line when both variables are subject to crrors is generalized to allow for correlation of the z and y errors, illustrated by reference to lead isochron fitting.
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The carbonate-silicate geochemical cycle and its effect on atmospheric carbon dioxide over the past 100 million years
TL;DR: In this article, a computer model has been constructed that considers the effects on the CO/sub 2/ level of the atmosphere, and the Ca, Mg, and HCO/sub 3/ levels of the ocean, of the following processes: weathering on the continents of calcite, dolomite, and calcium-and-magnesium-containing silicates; biogenic precipitation and removal of CaCO 3/from the ocean; removal of Mg from the ocean via volcanic-seawater reaction; and the metamorphic-magmatic decarbon
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A negative feedback mechanism for the long‐term stabilization of Earth's surface temperature
TL;DR: In this article, it is suggested that the partial pressure of carbon dioxide in the atmosphere is buffered, over geological time scales, by a negative feedback mechanism, in which the rate of weathering of silicate minerals (followed by deposition of carbonate minerals) depends on surface temperature, which in turn depends on the carbon dioxide partial pressure through the greenhouse effect.