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

我们的目标是确定方解石和水之间的三重氧同位素分馏因子(d17O，d18O)随温度的变化。该项目的一部分是开发一种高精度测量方解石D17O的协议。该方法包括方解石的酸消解和利用高精度气源质谱仪分析释放的二氧化碳中的d17O和d18O。我们将应用该方法测量方解石和水在不同温度下的d17O和d18O分馏。在这一进展中，我们还将确定17O/16O酸分馏系数。目的是介绍一种新的物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.