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Effects of Ca-enrichment on authigenic carbonate formation at cold vent sites off Costa Rica: a numerical model approach

Published online by Cambridge University Press:  05 July 2018

D. Karaca ,
C. Hensen  and
K. Wallmann
D. Karaca*
Affiliation:
Ifm-Geomar, Wischhofstrasse 1-3, D-24148, Kiel, Germany
C. Hensen
Affiliation:
Ifm-Geomar, Wischhofstrasse 1-3, D-24148, Kiel, Germany
K. Wallmann
Affiliation:
Ifm-Geomar, Wischhofstrasse 1-3, D-24148, Kiel, Germany
*
*E-mail: dkaraca@ifm-geomar.de
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Extract

The Costa Rican forearc is characterized by active fluid venting related to mud diapirism and volcanism. The geochemical compositions of fluids obtained from dewatering sites indicate that mineral precipitation or dehydration is the major driver of fluid mobilization and upward migration. The peculiar situation at the latter sites is that Ca concentrations in the upward migrating fluids are well above seawater levels. In turn, these Ca-enriched fluids could offer a potential reason for widespread carbonate caps on top of the mounds.

Type
Research Article
Information
Mineralogical Magazine , Volume 72 , Issue 1 , February 2008 , pp. 325 - 327
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2008

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