Isotopic Geochemistry of Panama Rivers

Year:

2015

Type of Publication:

Article

Keywords:

Panama

Authors:

Harmon, Russell S.; Wörner, Gerhard; Pribil, Michael J.; Kern, Zoltán; Fórizs, István; Lyons, W. Berry; Gardner, Christopher B.; Goldsmith, Steven T.

Journal:

Procedia Earth and Planetary Science

Volume:

13

Pages:

108 - 111

ISSN:

1878-5220

BibTex:

@article{Harmon2015108, author = "Russell S. Harmon and Gerhard W{\"o}rner and Michael J. Pribil and Zolt{\'a}n Kern and Istv{\'a}n F{\'o}rizs and W. Berry Lyons and Christopher B. Gardner and Steven T. Goldsmith", abstract = "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. ", doi = "http://dx.doi.org/10.1016/j.proeps.2015.07.026", issn = "1878-5220", journal = "Procedia Earth and Planetary Science ", keywords = "Panama", note = "11th Applied Isotope Geochemistery Conference AIG-11 ", pages = "108 - 111", title = "{I}sotopic {G}eochemistry of {P}anama {R}ivers ", url = "http://www.sciencedirect.com/science/article/pii/S1878522015001691", volume = "13", year = "2015", }

Note:

11th Applied Isotope Geochemistery Conference AIG-11

Abstract:

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.