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A hydrothermal apparatus for x-ray absorption spectroscopy of hydrothermal fluids at DESY

2021; American Institute of Physics; Volume: 92; Issue: 6 Linguagem: Inglês

10.1063/5.0044767

1527-2400

Stephan Klemme, M. Feldhaus, V. Potapkin, Max Wilke, Manuela Borchert, Marion Louvel, Anselm Loges, Arno Rohrbach, P. Weitkamp, Edmund Welter, Maria A. Kokh, Christian Schmidt, Denis Testemale,

Geochemistry and Geologic Mapping

We present a new autoclave that enables in situ characterization of hydrothermal fluids at high pressures and high temperatures at synchrotron x-ray radiation sources. The autoclave has been specifically designed to enable x-ray absorption spectroscopy in fluids with applications to mineral solubility and element speciation analysis in hydrothermal fluids in complex compositions. However, other applications, such as Raman spectroscopy, in high-pressure fluids are also possible with the autoclave. First experiments were run at pressures between 100 and 600 bars and at temperatures between 25 °C and 550 °C, and preliminary results on scheelite dissolution in fluids of different compositions show that the autoclave is well suited to study the behavior of ore-forming metals at P–T conditions relevant to the Earth’s crust.