Magmatic and Hydrothermal Processes in Porphyry Copper Deposits Below 3km Depth

9418931 Dilles斑岩铜矿化的起源与上地壳花岗岩岩浆房结晶过程中演化的岩浆热液流体有广泛的关系。 该研究将提供暴露在1至6公里深度（例如，内华达州耶灵顿区）的斑状铜花岗岩的关键地球化学数据。 这些数据将提供一个现场实验室测试目前的理论和实验模型的花岗岩结晶和演化的高含盐量，铜和硫丰富的流体沉淀矿石。 本研究将着重分析花岗岩黑云母、磁铁矿、角闪石和硫化物（黄铁矿、黄铜矿）中的铜、硫、锌和铜含量。 将通过电子微探针和离子微探针进行分析，使含量定量达到百万分之一的水平。 然后，微量元素的行为可以用来估计在结晶过程中，花岗岩达到水饱和并失去铜和硫的深度和时间。 同位素和成分数据将允许量化的重要性，非岩浆流体的矿石成分的来源。

9418931 Dilles The origin of porphyry copper mineralization has been broadly related to magmatic hydrothermal fluids that evolve during crystallization of upper crustal, granitic magma chambers. The research will provide critical geochemical data from porphyry copper granites that are exposed in cross- section from 1 to 6 km depth (e.g. the Yerington district, Nevada). The data will provide a field laboratory test of the current theoretical and experimental models of granite crystallization and evolution of highly saline, copper- and sulfur-rich fluids that precipitated ores. The research will emphasize analysis of copper, sulfur, zinc, and copper contents of granite biotite, magnetite, hornblende, and sulfides (pyrite, chalcopyrite). Analyses will be done by electron microprobe and ion microprobe, allowing quantification of contents to the one part-per-million level. The behavior of the trace elements can then be used to estimate at what depths and when during crystallization that granites reached water saturation and lose copper and sulfur. The isotopic and compositional data will allow quantification of the importance of the non-magmatic fluids as source of ore components.