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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Mean bedrock-to-saprolite conversion and erosion rates during mountain growth and decline
TL;DR: In this paper, the authors explore the possibility that erosion heterogeneity in uplifting landscapes significantly impacts the temporal relationships among mean uplift, erosion and weathering using a 3D landscape evolution model applied to a synthetic surface with different uplift and climate scenarios.
Journal ArticleDOI
Investigating the Paleoproterozoic glaciations with 3-D climate modeling
Yoram Teitler,Yoram Teitler,Guillaume Le Hir,Frédéric Fluteau,Pascal Philippot,Yannick Donnadieu +5 more
TL;DR: In this article, the authors used a GCM to estimate the partial pressures of atmospheric CO2 and CH4 required to account for the onset of snowball Earth conditions during the Paleoproterozoic.
Journal ArticleDOI
Oceanwide imprint of large tectonic and oceanic events on seawater Nd isotope composition in the Indian Ocean from 90 to 40 Ma
Sandrine Le Houedec,Laure Meynadier,Jean-Pascal Cogné,Claude J. Allègre,Alexandra T. Gourlan +4 more
TL;DR: In this paper, the authors analyzed four sediment cores from the Southern Indian Ocean (ODP sites 757, 758, 1135 and 762) with high carbonate content, in order to reconstruct the neodymium isotopic composition (eNd) of ancient intermediate South Indian seawater from Late Cretaceous (90 Ma) to Early Eocene (40 Ma).
Journal ArticleDOI
Continental weathering as a driver of Late Cretaceous cooling : new insights from clay mineralogy of Campanian sediments from the southern Tethyan margin to the Boreal realm
Elise Chenot,Jean-François Deconinck,Emmanuelle Pucéat,Pierre Pellenard,Michel Guiraud,Maxime Jaubert,Ian Jarvis,Nicolas Thibault,Théophile Cocquerez,Ludovic Bruneau,Mohammad Javad Razmjooei,Myriam Boussaha,James Richard,Jean-Pierre Sizun,Lars Stemmerik +14 more
TL;DR: In this article, new clay mineralogical analyses have been performed on Campanian sediments from the Tethyan and Boreal realms along a palaeolatitudinal transect from 45° to 20°N (Danish Basin, North Sea, Paris Basin, Mons Basin, Aquitaine Basin, Umbria-Marche Basin and Tunisian Atlas).
Mean bedrock-to-saprolite conversion and erosion rates during mountain growth and decline
TL;DR: In this paper, the authors explore the possibility that erosion heterogeneity in uplifting landscapes significantly impacts the temporal relationships among mean uplift, erosion and weathering using a 3D landscape evolution model applied to a synthetic surface with different uplift and climate scenarios.
References
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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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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.