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The effect of time on the weathering of silicate minerals: why do weathering rates differ in the laboratory and field?

Dates

Year
2003

Citation

White, Art F, and Brantley, Susan L, 2003, The effect of time on the weathering of silicate minerals: why do weathering rates differ in the laboratory and field?: Chemical Geology, v. 202, iss. 3–4, p. 479-506.

Summary

The correlation between decreasing reaction rates of silicate minerals and increasing duration of chemical weathering was investigated for both experimental and field conditions. Column studies, using freshly prepared Panola Granite, produced ambient plagioclase weathering rates that decreased parabolically over 6 years to a final rate of 7.0×10−14 mol m−2 s−1. In contrast, the corresponding plagioclase reaction rate for partially kaolinized Panola Granite, after reaching steady-state weathering after 2 months of reactions, was significantly less (2.1×10−15 mol m−2 s−1). Both rates were normalized to plagioclase content and BET surface area. Extrapolation of decreasing rates for the fresh plagioclase with time indicated that several [...]

Contacts

Communities

  • USGS National Research Program

Tags

Provenance

Added to ScienceBase on Thu Apr 18 09:20:35 MDT 2013 by processing file <b>Geochemical Reactions Between Water and Mineral Substrates.xml</b> in item <a href="https://www.sciencebase.gov/catalog/item/51118c8ae4b0361176563a13">https://www.sciencebase.gov/catalog/item/51118c8ae4b0361176563a13</a>

Additional Information

Identifiers

Type Scheme Key
DOI http://sciencebase.gov/vocab/identifierScheme 10.1016/j.chemgeo.2003.03.001

Citation Extension

journalChemical Geology
parts
typePages
value479-506
typeVolume
value202
typeIssue
value3–4
citationTypeJournal Article

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