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High-precision measurement of chlorine stable isotope ratios

Authors
Journal
Geochimica et Cosmochimica Acta
0016-7037
Publisher
Elsevier
Publication Date
Volume
57
Issue
12
Identifiers
DOI: 10.1016/0016-7037(93)90398-g
Disciplines
  • Earth Science
  • Geography

Abstract

Abstract We present an analysis procedure that allows stable isotopes of chlorine to be analyzed with precision sufficient for geological and hydrological studies. The total analytical precision is ≤±0.09%., and the present known range of chloride in the surface and near-surface environment is 3.5‰. As Cl − is essentially nonreactive in natural aquatic environments, it is a conservative tracer and its δ 37 Cl is also conservative. Thus, the δ 37 Cl parameter is valuable for quantitative evaluation of mixing of different sources of chloride in brines and aquifers.

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