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Atmosphere-derived noble gas evidence for the preservation of ancient waters in sedimentary basins

Daniele L. Pinti, Bernard Marty and John N. Andrews
Atmosphere-derived noble gas evidence for the preservation of ancient waters in sedimentary basins
Geology (Boulder) (February 1997) 25 (2): 111-114

Abstract

Hydrological modeling of the Middle Jurassic carbonate aquifer of the Paris Basin indicated fluid residence time from 1 k.y. to 100 k.y., whereas the chemistry of waters suggested longer residence time. Here, we report independent water age estimates on the basis of atmosphere-derived noble-gas recharge paleotemperatures. The calculated paleotemperatures range from 15 to 26 degrees C and are related to the stable isotope composition and the salinity of the waters, and the distance from the recharge. The spatial distribution of the paleotemperatures suggests (1) occurrence of old saline waters in the center of the basin which infiltrated during the warmer climate interval in the Tertiary (Eocene) and (2) dilution by recent fresh waters (early Pleistocene) flowing from the recharge. These results strongly suggest that deep aquifers in sedimentary basins can store waters for very long periods of time, in contrast to the conclusions reached from hydrological modeling.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 25
Serial Issue: 2
Title: Atmosphere-derived noble gas evidence for the preservation of ancient waters in sedimentary basins
Affiliation: Osaka University, Department of Earth and Space Science, Osaka, Japan
Pages: 111-114
Published: 199702
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 20
Accession Number: 1997-020212
Categories: HydrogeologyHydrochemistry
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Cent. Rech. Petrogr. et Geochim., Contrib. No. 1227
Illustration Description: illus. incl. 1 table, sketch map
N48°30'00" - N49°10'00", E03°00'00" - E03°00'00"
Secondary Affiliation: Centre des Recherches Petrographiques et Geochimiques, Nancy, FRA, FranceUniversity of Reading, Reading, GBR, United Kingdom
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 199707
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