Chemical and Stable Isotopic Evolution of Stratified Thermal Fluids in the Salton Sea Geothermal System, California

国际和平研究所建议继续研究索尔顿海地热系统，特别是深层高盐度卤水与更浅、更稀的卤水之间的相互作用。这两个储集层似乎在沉积储集层内分层，具有与250摄氏度等温线平行的锐利的密度控制界面。同位素数据显示，这两种流体可能具有不同的来源，其独特的化学成分意味着沿着各自的流动路径有不同的水-岩相互作用历史。热液循环和成矿作用均受这些流体的盐度分层性质控制。进一步的工作是利用商业生产油井的样品来增加现有的数据库。最终目的是了解这两个流体储集层的演化及其在控制成矿中的作用。

The Pi's propose to continue investigations of the Salton Sea Geothermal system and particularly the interaction between deep hypersaline brines and Shallower, more dilute brines. These two reservoirs seem to be stratified within the sediment reservoir with a sharp density controlled interface paralleling the 250C isotherm. Isotopic data reveal that the two fluids may have different sources, and their distinctive chemical compositions imply different water-rock interaction histories along their respective flow paths. Both hydrothermal circulation and ore deposition are controlled by the salinity stratified nature of these fluids. Further work is intended to add to the existing data base using samples from commercial production wells. The ultimate goal is to understand the evolution of the two fluid reservoirs and their role in controlling metallogenesis.