Ore-Forming Processes in Hydrothermal Systems: A Study Utilizing the SHRIMP Ion Microprobe

本项目旨在将硫同位素系统学的研究扩展到 其他大陆热液系统，利用新的 从活跃的地热系统采集的岩心和流体样品， 以及化石低温热液金矿。 PI将检查 硫化物矿物硫同位素分带的一般系统学 响应于沸腾和其它形式的流体不可渗透性， 成矿环境 建议的一般性 对贵金属沉积的平行影响也将是 在几个地方测试。 除了Valles Caldera， 加州的间歇泉和科索地热田提供了两个 沸腾和贵金属沉积的活动设置 发生. 此外，McLaughlin和Cactus Queen Gold 加州的沉积物提供了两个化石超热系统， 在成矿过程中可能存在类似的系统学。

This project is to extend studies of S isotope systematics to other continental hydrothermal systems, making use of new drillcores and fluid samples from active geothermal systems as well as fossil epithermal gold deposits. The PI will examine the general systematics of sulfur isotopic zoning of sulfide minerals in response to boiling and other forms of fluid immiscibility in ore-forming environments. The generality of the proposed parallel effects on precious metals deposition will also be tested at several localaties. In addition to the Valles Caldera, the Geysers and Coso geothermal fields in California offer two active settings where boiling and precious metals deposition occur. Additionally, the McLaughlin and Cactus Queen gold deposits in California offer two fossil epithermal systems where similar systematics may have existed during ore genesis.