Quantifying palaeohumidity in the Atacama Desert since the Miocene using total water isotopes in gypsum, halite and diatomite (D03)

我们试图分析阿塔卡马沙漠湖泊和成壤样品中自由水和石膏、盐岩和无定形生物硅酸盐提取的水中的所有水同位素(1H，2H，16O，17O，18O)。这项研究的目的是重建关于温度和湿度的气候平均状态，以及用U-Th或U-Pb测年的旧材料的风速经验参数。这些气候变量与蒸发过程中自由水和矿物质结合水的同位素演化有关，这是由已建立的Craig-Gordon方程确定的。

We seek to analyze all water isotopes (1H, 2H, 16O, 17O, 18O) in free water and water extracted from Gypsum, Halite, and amorphous biogenic silicate in lacustrine and pedogenic samples from the Atacama Desert. The purpose of this study is to reconstruct the climate mean state regarding temperature and humidity, along with an empiric parameter for wind speed on old material dated with U-Th or U-Pb. These climatic variables are related to the isotopic evolution of free water and mineral-bound water during evaporation, as determined by the established Craig-Gordon equations.