Journal ArticleDOI
Basalt weathering laws and the impact of basalt weathering on the global carbon cycle
TLDR
In this paper, the chemical weathering of basalts and the flux of carbon transferred from the atmosphere to the ocean during this major process at the surface of the Earth were investigated.About:
This article is published in Chemical Geology.The article was published on 2003-12-30. It has received 762 citations till now. The article focuses on the topics: Soil production function & Weathering.read more
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Silicon isotopes and continental weathering processes: assessing controls on Si transfer to the ocean
Sophie Opfergelt,Pierre Delmelle +1 more
TL;DR: In this article, the authors evaluate the application of Si isotopes to gain new insights into weathering processes on distinct spatial and temporal scales, and suggest that bulk soil δ30Si is inversely correlated to weathering degree, regardless of variability in climate, soil age and lithology.
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A GEOCLIM simulation of climatic and biogeochemical consequences of Pangea breakup
Yannick Donnadieu,Yannick Donnadieu,Yves Goddéris,Raymond T. Pierrehumbert,Gilles Dromart,Frédéric Fluteau,Robert Jacob +6 more
TL;DR: In this article, a coupled numerical model of the climate and global biogeochemical cycles is used to investigate the consequences of the Pangea supercontinent breakup, resulting in enhanced atmospheric CO2 consumption through silicate weathering.
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CO2–water–basalt interaction. Numerical simulation of low temperature CO2 sequestration into basalts
TL;DR: In this article, the interaction between CO 2 -rich waters and basaltic glass was studied using reaction path modeling in order to get insight into the water-rock reaction process including secondary mineral composition, water chemistry and mass transfer as a function of CO 2 concentration and reaction progress.
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Floodplains of large rivers: Weathering reactors or simple silos?
Julien Bouchez,Jérôme Gaillardet,Maarten Lupker,Pascale Louvat,Christian France-Lanord,Laurence Maurice,Elisa Armijos,Jean-Sébastien Moquet +7 more
TL;DR: In this paper, the chemical composition of river sediments from different locations throughout the courses of the main tributaries of the Amazon Basin is reported, showing that chemical weathering of stable alluvial deposits could also significantly contribute to the weathering flux generated in foreland and lowland areas.
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Elemental and isotopic (29Si and 18O) tracing of glass alteration mechanisms
Nathalie Valle,Aurélie Verney-Carron,Jérôme Sterpenich,Guy Libourel,Etienne Deloule,Patrick Jollivet +5 more
TL;DR: In this article, leaching experiments of a borosilicate glass (SON68) doped with a different rare earth element (La, Ce, or Nd) with solutions rich in 29Si and 18O were carried out.
References
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Journal ArticleDOI
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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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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Tectonic forcing of late Cenozoic climate
TL;DR: In particular, tectonically driven increases in chemical weathering may have resulted in a decrease of atmospheric C02 concentration over the past 40 Myr as discussed by the authors. But this was not shown to be the case for the uplift of the Tibetan plateau and positive feedbacks initiated by this event.
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Geocarb III: A Revised Model of Atmospheric CO2 over Phanerozoic Time
TL;DR: In this article, the GEOCARB model has been updated with an emphasis on factors affecting CO2 uptake by continental weathering, including the role of plants in chemical weathering and the application of GCMs to study the long-term carbon cycle.
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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.