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

合作研究：矿床的年龄、持续时间和金属来源

• 批准号: 9725833
• 负责人: John Chesley
• 金额: $ 6.56万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-06-15 至 2001-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9725833&HistoricalAwards=false
• 关键词: Collaborative; Research; Age; Duration; Metal

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.

9725833切斯利尽管长期和严格的审查一些最基本的问题有关矿床，如年龄，持续时间和来源，仍然很少限制许多存款类型。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存款的年龄、持续时间和演变。主要利用三种同位素体系确定加斯帕尔热液系统在空间和时间上的演化：[1]石榴石、辉石、白钨矿和萤石中的Sm-Nd; [2]辉绿石、黄铜矿和黄铁矿中的Re-Os;[3]钛铁矿、褐帘石、锆石和石榴石中的U-Pb。岩浆、夕卡岩和围岩之间的成分对比以及可以用这些系统分析的多种矿物，为研究矿化的年龄和持续时间、单个矿化/蚀变幕/带的年龄、金属的来源以及复杂热液环境中不同同位素系统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各样的矿床。