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Physical and chemical controls on the critical zone

Elements

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, , and
DOI: 10.2113/gselements.3.5.315

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Abstract

Geochemists have long recognized a correlation between rates of physical denudation and chemical weathering. What underlies this correlation? The Critical Zone can be considered as a feed-through reactor. Downward advance of the weathering front brings unweathered rock into the reactor. Fluids are supplied through precipitation. The reactor is stirred at the top by biological and physical processes. The balance between advance of the weathering front by mechanical and chemical processes and mass loss by denudation fixes the thickness of the Critical Zone reactor. The internal structure of this reactor is controlled by physical processes that create surface area, determine flow paths, and set the residence time of material in the Critical Zone. All of these impact chemical weathering flux.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Physical and chemical controls on the critical zone
Series title:
Elements
DOI:
10.2113/gselements.3.5.315
Volume
3
Issue:
5
Year Published:
2007
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Elements
First page:
315
Last page:
319
Number of Pages:
5