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Origin of caves and other solution openings in the unsaturated ( vadose) zone of carbonate rocks: a model for CO2 generation.

Geology

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Abstract

The enigma that caves and other solution openings form in carbonate rocks at great depths below land surface rather than forming from the surface downward can be explained by the generation of CO2 within the aquifer system. In the proposed model, CO2 is generated by the oxidation of particulate and/or dissolved organic carbon that is transported from the land surface deep into the unsaturated zone by recharging ground water. The organic material is oxidized to CO2 by aerobic bacteria utilizing oxygen that diffuses in from the atmosphere. Because gas transport in the unsaturated zone is controlled largely by diffusion, steady-state generation of even minute amounts of CO2 deep in the unsaturated zone results in the creation of large concentrations of CO2 at depth as it establishes a concentration gradient to the surface or other sink. -from Author

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Origin of caves and other solution openings in the unsaturated ( vadose) zone of carbonate rocks: a model for CO2 generation.
Series title:
Geology
Volume
13
Issue:
11
Year Published:
1985
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geology
First page:
822
Last page:
824