Sauerstoffisotopieeffekte und Hydratstruktur von Alkalihalogenid-Lösungen in H2O und D2O / Oxygen Isotope Effects and Hydrate Structure of Alkali Halide Solutions in H2O and D2O

Götz, D.; Heinzinger, K.

doi:10.1515/zna-1973-0204

Cited by 10 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, it was not until the late 1960s and the early 1970s that systematic experimental studies were carried out to examine the effects of dissolved salts on both the oxygen and hydrogen isotope activity ratios of water in various salt solutions of geochemical interest. Several investigators (Coplen, 1970;Rennow, 1970;Gat, 1972, 1975;Götz and Heinzinger, 1973;Stewart and Friedman, 1975;Bopp et al, 1977) clearly demonstrated that the isotope effects of many salts of geochemical interest were by no means trivial near room temperature, and that they must be taken into account for geochemical studies involving brines, both experimental and natural. With the addition of more recent studies, by Kakiuchi (1988Kakiuchi ( , 1994Kakiuchi ( , 1997, O'Neil and Truesdell (1991) and Horita et al (1993a), the isotope salt effects in most salt solutions of geochemical interest are reasonably well established for temperatures below 100°C (see Fig.…”

Section: Isotope Salt Effectmentioning

confidence: 99%

Stable isotope thermometry: There is more to it than temperature

Horita

2005

Geochem. J.

View full text Add to dashboard Cite

The concept of isotope thermometry, which has been the heart and soul of stable isotope geochemistry since its foundation more than half a century ago, has been constantly tested against the effect of other variables such as pressure, fluid composition and biological processes. Despite the fact that the effect of dissolved salts on isotope partitioning in aqueous systems (the isotope salt effect) was discovered in the early 1950s, soon after carbonate paleothermometry commenced, it took isotope geochemists decades to understand the detail and geochemical significance of the effects, particularly those at elevated temperatures. The effect of pressure, which is potentially large under subduction zone and mantle conditions, has been even more elusive. The 1990s witnessed several significant breakthroughs in experimental and theoretical developments for understanding the effect of these variables on equilibrium isotope partitioning. The controversy of high temperature (>100°C) isotope salt effects was finally resolved. It was demonstrated later that significant pressure effects exist for D/H fractionation between a hydrous mineral and water at 200-600°C and at pressures to 0.8 GPa. Theoretical advances in understanding the isotope pressure effects, on both minerals and water, were also made during this period. Finally, and unexpectedly, the effects of dissolved minerals were proved to be significant on isotopic distributions in aqueous systems at high temperature and pressure (750°C and 1.5 GPa). This article reviews historical development of these "other" effects in isotope thermometry, highlighting significant discoveries of the past decade.

show abstract