The calculation of water-rock ratios using trace element (Li, B) stable isotopes

• DOI: 10.17951/aaa.2016.71.79
• Publication Date: 2019-04-11T17:28:57Z
• Authors: Laurent Simon; Christophe Lécuyer; Thibaut Putelat
• Keywords: Trace element; Isotopes of strontium

The amount of aqueous fluids circulating into the oceanic crust can be estimated using mass balance equations based on stable isotope exchange between rock and water. Unlike oxygen strontium, isotopic trace elements (such as B or Li) rocks, operates along with a chemical evolution rocks (e.g. large enrichment that must integrated any model water-rock interaction. We propose general dimensionless equation for single-pass open systems describes equilibrium elemental distribution composition reacting function Water-rock ratios calculated from compositions hydrothermally-altered basalts range 8 to 100. They are lower than those previously published (most W/R > 300) but comparable inferred Sr measured in same samples (3 < 30). Similar low 2 20 Li altered serpentinized peridotites.