Isotopic geochemistry of Panama rivers

Russell S. Harmon; Gerhard Worner; Michael Pribil; Zoltan Kern; Istvan Forizs; W. Berry Lyons; Christopher B. Gardner; Steven T. Goldsmith

doi:10.1016/j.proeps.2015.07.026

Isotopic geochemistry of Panama rivers

Procedia Earth and Planetary Science

By: Russell S. Harmon, Gerhard Worner, Michael Pribil, Zoltan Kern, Istvan Forizs, W. Berry Lyons, Christopher B. Gardner, and Steven T. Goldsmith

https://doi.org/10.1016/j.proeps.2015.07.026

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Abstract

River water samples collected from 78 watersheds rivers along a 500-km transect across a Late Cretaceous-Tertiary andesitic volcanic arc terrane in west-central Panama provide a synoptic overview of riverine geochemistry, chemical denudation, and CO₂ consumption in the tropics. D/H and ¹⁸O/¹⁶O relationships indicate that bedrock dissolution of andesitic arc crust in Panama is driven by water-rock interaction with meteoric precipitation as it passes through the critical zone, with no evidence of a geothermal or hydrothermal input. Sr-isotope relationships suggest a geochemical evolution for Panama riverine waters that involves mixing of bedrock pore water with water having ⁸⁷Sr/⁸⁶Sr ratios between 0.7037-0.7043 and relatively high Sr-contents with waters of low Sr content that enriched in radiogenic Sr that are diluted by infiltrating rainfall to variable extents.

Additional publication details
Publication type	Article
Publication Subtype	Journal Article
Title	Isotopic geochemistry of Panama rivers
Series title	Procedia Earth and Planetary Science
DOI	10.1016/j.proeps.2015.07.026
Volume	13
Year Published	2015
Language	English
Publisher	Elsevier
Contributing office(s)	Central Mineral and Environmental Resources Science Center
Description	4 p.
First page	108
Last page	111
Country	Panama