Collaborative Research: Age, Duration, and Metal Sources of Ore Deposits

切斯利尽管进行了长时间和严格的审查，但关于矿床的一些最基本的问题，如年龄、持续时间和来源，对于许多矿床类型来说，仍然缺乏约束。华盛顿州立大学和亚利桑那大学的这项合作研究旨在调查加拿大一个大型铜矿床的年龄、持续时间和演化。GAP热液系统在空间和时间上的演化将主要利用三个同位素体系来确定：[1]石榴石、辉石、白钨矿和萤石中的Sm-ND；[2)辉钼矿、黄铜矿和黄铁矿中的Re-Os；以及[3]钛铁矿、尿安石、锆石和石榴石中的U-Pb。岩浆、夕卡岩和围岩与多种矿物的成分对比可以用这些系统进行分析，这为研究矿化的年龄和持续时间、个别矿化/蚀变幕/带的年龄、金属的来源以及不同同位素体系在复杂热液环境中的行为提供了无与伦比的机会。从这项研究中获得的见解将适用于各种类型的矿床。

9725833ChesleyDespite long and intense scrutiny some of the most basic questions concerning ore deposits, such as age, duration and source, remain poorly constrained for many deposit types. This collaborative research effort between Washington State University and the University of Arizona is designed to investigate the age, duration and evolution of a large copper deposit in Canada. The evolution of the GaspÚ hydrothermal system in both space and time will be determined utilizing primarily three isotopic systems: [1] Sm-Nd in garnet, pyroxene, scheelite and fluorite; [2] Re-Os in molybdenite, chalcopyrite and pyrite; and [3] U-Pb in titanite, allanite, zircon and garnet. The compositional contrasts among magma, skarn and wall rocks combined with multiple minerals which can be analyzed with these systems, provide an unparalleled opportunity for investigating the age and duration of mineralization, the age of individual mineralization/alteration episodes/zones, the sources of metals, and the behavior of different isotopic systems in a complex hydrothermal environment. The insights gained from this research will be applicable to a wide variety of ore deposits.