Precious Metal Mineralization in an Oceanic-Type Layered Gabbro: Kap Edvard Holm Complex, East Greenland

海洋型层状辉长岩中的贵金属矿化：东格陵兰 Kap Edvard Holm 杂岩

• 批准号: 9220431
• 负责人: Dennis Bird
• 金额: $ 15.47万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-01-15 至 1996-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9220431&HistoricalAwards=false
• 关键词: Precious; Metal; Mineralization; Oceanic; Type

Recent discoveries of gold and platinum group (PGE) mineralization in Eocene layered gabbros of East Greenland demonstrate that physical and chemical processes associated with the transition from continental to oceanic rifting can concentrate precious metals in the Earth's crust. One of these gabbros, the Kap Edvard Holm Complex, exhibits an unusual combination of features related to stratiform precious metal mineralization. An understanding of these processes requires detailed field, petrologic, isotopic, and chemical analyses, combined with theoretical analysis of the thermodynamic and transport characteristics of magma- hydrothermal systems. The long-term plans for this research program involve using these techniques to provide new insights into the nature of processes controlling: 1) precious metal concentration during gabbro crystallization; and 2) precious metal transport and deposition in gabbro- hosted hydrothermal systems. A specific objective of the research will be evaluation of various hypotheses that may explain the unusually high ratio of precious metal to sulfide that is characteristic of this deposit. Investigation of the processes responsible for mineralization in the East Greenland gabbros is potentially of great importance to understanding the global distribution of precious metals and to formulating future mineral exploration strategies.

金铂族元素（PGE）的新发现 东格陵兰始新世层状辉长岩成矿作用 证明了物理和化学过程 随着大陆向海洋裂谷的转变， 使贵金属集中在地壳中 之一 这些辉长岩，卡普爱德华霍尔姆复杂， 与层状有关的特征的不寻常组合 贵金属矿化 了解这些 过程需要详细的现场，岩石学，同位素， 化学分析，结合理论分析， 岩浆的热力学和输运特征 热液系统这项研究的长期计划 计划涉及使用这些技术来提供新的 洞察过程控制的本质：1） 辉长岩结晶过程中贵金属的富集; 贵金属在辉长岩中的迁移和沉积。 热液系统。 一个具体的目标， 研究将评估各种假设， 解释了贵金属与 这种存款特有硫化物。 调查导致 东格陵兰辉长岩中的矿化可能 对了解全球分布有重要意义 贵金属和未来矿物的配制 探索战略。