Long-term flow-through column experiments and their relevance to natural granitoid weathering rates
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TLDR
In this article, four pairs of fresh and partly-weathered granitoids, obtained from well-characterized watersheds, were reacted in columns under ambient laboratory conditions for 13.8 years, the longest running experimental weathering study to date.About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 2017-04-01 and is currently open access. It has received 26 citations till now. The article focuses on the topics: Plagioclase.read more
Citations
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Application of upscaling methods for fluid flow and mass transport in multi-scale heterogeneous media: A critical review
Xiaoying Zhang,Funing Ma,Shangxian Yin,Corey D. Wallace,Mohamad Reza Soltanian,Zhenxue Dai,Robert W. Ritzi,Ziqi Ma,Chuanjun Zhan,Xiaoshu Lü +9 more
TL;DR: This review covers, in a comprehensive manner, the upscaling approaches available in the literature and their applications on various processes, such as advection, dispersion, matrix diffusion, sorption, and chemical reactions.
The dependence of chemical weathering rates on fluid residence time
TL;DR: In this paper, a reactive transport analysis is used to interpret chemical weathering rate data for a range of systems, showing that weathering rates depend most strongly on fluid residence times and fluid flow rates, and depend very weakly on material age.
Journal ArticleDOI
Physical heterogeneity control on effective mineral dissolution rates
TL;DR: In this article, the authors present multiple reactive transport simulations of anorthite dissolution in 2D latticed random permeability fields and link the information from local grid scale (1 cm or 4 cm) dissolution rates to domain-scale (1m or 400m) effective dissolution rates measured by the flux-weighted average of an ensemble of flow paths.
Journal ArticleDOI
Scale effect on the time dependence of mineral dissolution rates in physically heterogeneous porous media
TL;DR: In this article, the authors present multiple reactive transport simulations of anorthite dissolution over 3000 years with 2D latticed random permeability fields on small (1 m 1 m 1 1/1/m) and large (400 m 1/3/4m) domains.
Journal ArticleDOI
Controls on granitic weathering fronts in contrasting climates
TL;DR: In this paper, a short 30m granitic weathering profile from the Lysina catchment in the NW Czech Republic was used to identify environmental and geological controls on weathering front morphology and chemical weathering rates.
References
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Book ChapterDOI
Hydraulic Conductivity and Diffusivity: Laboratory Methods
A. Klute,C. Dirksen +1 more
TL;DR: In this paper, the authors describe several laboratory methods of determining the hydraulic conductivity and hydraulic diffusivity of a soil water flow system to a set of applied boundary conditions, including bulk movement, under isothermal conditions, of the liquid phase in response to mechanical driving forces.
Journal ArticleDOI
The effect of time on the weathering of silicate minerals: why do weathering rates differ in the laboratory and field?
Art F. White,Susan L. Brantley +1 more
TL;DR: In this article, the correlation between decreasing reaction rates of silicate minerals and increasing duration of chemical weathering was investigated for both experimental and field conditions, and it was shown that intrinsic surface area, which increases with the duration of weathering, was responsible for a third of the exponential decrease in the weathering rate.
Journal ArticleDOI
Constitutive mass balance relations between chemical composition, volume, density, porosity, and strain in metasomatic hydrochemical systems: Results on weathering and pedogenesis
TL;DR: In this paper, chemical, physical, and mechanical changes resulting from metasomatic hydrochemical processes are developed using mass balance models which formally link chemical composition to bulk density, mineral density, volumetric properties, porosity, and amount of deformation (strain).
Journal ArticleDOI
Acid Rain: A Serious Regional Environmental Problem
TL;DR: Only some of the ecological and economic effects of this widespread introduction of strong acids into natural systems are known at present, but clearly they must be considered in proposals for new energy sources and in the development of air quality emission standards.
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The effect of time on the weathering of silicate minerals: why do weathering rates differ in the laboratory and field?
Art F. White,Susan L. Brantley +1 more