Experimental Determination of the Solubility of PGE in Hydrothermal Chloride Solutions

在科学文献中存在关于铂族元素（PGE，例如，铂、钯、铱）可以通过热液流体迁移和浓缩形成矿床。由于缺乏实验数据来检验热液过程在铂族元素浓度达到经济水平方面发挥作用的假设，这一辩论受到阻碍。为了弥补数据的不足，将进行一系列实验。其中一些实验将试图确定钯，铂和铱在地质相关的热液溶液中的相对溶解度。将进行其他实验，以模拟热液流体对富含镁的含铂族元素岩石的影响，这些岩石与许多铂族元素矿点中的岩石相似。后一个实验将试图直接模拟发生在安大略科尔德韦尔复杂的马拉松铜钯存款的热液过程。在后面的实验中采用的矿物组合和条件将基于温莎大学（I.M.）的同事对存款进行的同时实地研究。Samson，B.J. Fryer）和滑铁卢大学（R. Linnen）。一名博士后研究员、一名本科生和一名研究生将参加该项目，并将接受含水地球化学方面的培训。两人都将被鼓励在国家科学会议上介绍他们的工作，博士后研究员将参加本科地球化学的教学。该项目将加强和扩大PI与加拿大同事之间的现有合作。通过改进铂族元素矿床的勘探模型，本研究的结果将具有直接的社会经济效益。它们还可能导致改进的方法，湿法冶金处理的铂族元素矿石和更好地了解腐蚀的铂族元素和铂族元素合金在水热溶液中。

Wood0229495There is debate in the scientific literature as to the extent to which the platinum-group elements (PGE, e.g., platinum, palladium, iridium) can be transported and concentrated by hydrothermal fluids to form ore deposits. The debate is hampered by a lack of experimental data with which to test the hypothesis that hydrothermal processes play a role in the concentration of the PGE to economic levels. To redress this lack of data, a series of experiments will be conducted. Some of these experiments will attempt to determine the relative solubilities of palladium, platinum, and iridium in hydrothermal solutions of geological relevance. Other experiments will be conducted to simulate the effect of hydrothermal fluids on magnesium-rich; PGE-bearing rocks similar to those in many PGE occurrences. The latter experiments will attempt to directly model hydrothermal processes that have occurred in the Marathon copper-palladium deposit in the Coldwell Complex, Ontario. The mineral assemblages and conditions employed in the latter experiments will be based on concurrent field-based research on the deposit being conducted by colleagues at the University of Windsor (I.M. Samson, B.J. Fryer) and the University of Waterloo (R. Linnen). A postdoctoral fellow, an undergraduate student, and a graduate student will participate in the project and will be trained in aqueous geochemistry. Both will be encouraged to present their work at national scientific meetings, and the postdoctoral fellow will participate in teaching of undergraduate geochemistry. The project will strengthen and expand existing collaboration between the PI and Canadian colleagues. The results of this research will be of direct socioeconomic benefit via the development of improved exploration models for PGE deposits. They may also lead to improved methods of hydrometallurgical treatment of PGE ores and to a better understanding of the corrosion of PGE and PGE-alloys in hydrothermal solutions.