Stability and Reactivity of Metastable Sulfur Oxyanions in Hydrothermal Solutions

本研究的目的是：(1)实验研究硫代硫酸盐和聚硫酸盐是如何通过硫-水相互作用（t100℃）形成的；(2)实验确定硫代硫酸盐和聚硫酸盐的热稳定性；(3)实验确定矿物表面（黄铁矿和石英）和微量Fe2+(aq)对(1)和(2)的催化作用；(4)原位测定黄石国家公园几个富硫温泉中硫的形态。通过热液实验室的实验工作和与美国地质调查局合作的实地工作相结合，实现了目标。离子色谱技术将用于硫物种的原位分析，PI将再次与Kirk Nordstrom合作，并使用配备与PI实验室相同集成电路的移动美国地质调查局实验室。这些实验的结果将用于鉴定可能含有高浓度硫氧离子的天然热液溶液。

The objectives of this study are: (1) to investigate experimentally how thiosulfate and polythionates form through sulfur-water interaction (T100oC), (2) to determine experimentally the thermal stabilities of thiosulfate and polythionates, (3) to determine experimentally the catalytic effects of mineral surfaces (pyrite and quartz) and trace levels of Fe2+(aq) on (1) and (2), and (4) to determine the sulfur speciation in several sulfur-rich hot springs in Yellowstone National Park in situ. Objectives are achieved through a combination of experimental work in the hydrothermal laboratory and field work in collaboration with the U.S.G.S. Ion Chromatographic techniques will be used for the in situ analysis of sulfur species, the PI will again collaborate with Kirk Nordstrom, and use a mobile, U.S.G.S. laboratory equipped with an IC identical to the one in the PI's lab. The results of these experiments will be used to identify natural hydrothermal solutions that could contain sulfur oxyanions in significant concentrations.