Physics
Scientific paper
Feb 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986e%26psl..77...49a&link_type=abstract
Earth and Planetary Science Letters, Volume 77, Issue 1, p. 49-58.
Physics
18
Scientific paper
The meteoric input of 36Cl due to cosmogenic or nuclear-weapon-produced 36Cl cannot contribute significantly to the 36Cl present in the saline groundwaters (up to 700 mg l-1 Cl-) from the Stripa granite. The extent of in-situ production of 36Cl has been estimated on the basis of the neutron fluxes within the granite and its surrounding leptite. The 36Cl present in the groundwaters is attributed to either admixture of labelled Cl- from the leptite with Cl- from the granite or to the total derivation of groundwater chlorinity within the leptite followed by radiochemical ingrowth of 36Cl during subsequent groundwater residence within the granite. The chloride derived from the leptite may be either matrix chloride or chloride from an external source which has had a long residence time within the leptite. The implications of 36Cl in-situ production for the estimation of groundwater residence times and for the geochemical evolution of groundwater chlorinity are discussed.
Andrews John N.
Elmore David
Fontes Jean-Charles
Michelot Jean-Luc
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