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(Article of periodic en Anglais - 1984)

Document title

Isotopic evidence for glacial meltwater recharge to the Cambrian-Ordovician aquifer, north-central United States

Authors(s) and Affiliation(s)

SIEGEL D. I. ; MANDLE R. J. ;

Abstract

The chemistry of water in the Cambrian-Ordovician aquifer in six midwestern states has been studied as part of the Northern Midwest Regional Aquifer-System Analysis of the US Geological Survey. The differences in isotopic ratios between groundwater and modern recharge water reflect meteoric signatures of water during past recharge events rather than geochemical processes such as isotopic exchange with aquifer materials. The pronounced parallelism between the distribution of isotopes and dissolved solids over large areas probably reflects large-scale recharge of Pleistocene glacial meltwater into the aquifer system, which probably had a paleoflow system with a gradient from northeast to southwest rather than from northwest to southeast.

Source

Article of periodic

published at : Quaternary research New York

Editor :

Millesime : 1984, vol. 22, no3 [pp. 328-335]

Bibliographic references : 24 réf

Language

Anglais

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