Experimental determination of theta(T) for the calcite-water equilibium

我们的目的是确定方解石和水之间的三氧同位素分馏因子（d17O, d18O）随温度的变化。该项目的一部分是制定方解石D17O的高精度测量方案。该方案包括方解石的酸消解和用高精度气源质谱法分析释放CO2中的d17O和d18O。我们将应用该方案测量不同温度下方解石和水之间d17O和d18O的分馏。在此开发中，我们还将确定17O/16O酸分馏因子。目的是介绍一种新的溯源工具和一种新的准单相温度计。

We aim to determine the triple oxygen isotope fractionation factors (d17O, d18O) between calcite and water as function of temperature. A part of the project is the development of a protocol for high-precision measurements of D17O of calcite. The protocol includes acid digestion of calcite and analysis of d17O and d18O of liberated CO2 by means of high-precision gas source mass spectrometry. We will apply the protocol to measure the d17O and d18O fractionation between calcite and water at different temperatures. Within this development, we will also determine the 17O/16O acid fractionation factor. The goal is to introduce a new provenance tool and a new quasi single phase thermometer.