PGE distribution in the New Afton Cu-Au porphyry deposit**

New Afton 铜金斑岩矿床中 PGE 的分布**

• 批准号: 536604-2018
• 负责人: Mungall, James
• 金额: $ 1.82万
• 依托单位: Carleton University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=660428
• 关键词: PGE; distribution; New; Afton; Cu

Much of Canada's primary production of both copper and gold comes from deposits called alkalic porphyry deposits. These deposits are hosted by or associated with a type of igneous intrusion that is thought to be derived by melting of the mantle deep beneath the Earth's crust over subduction zones. Although these deposits are mined for copper and gold, the ores commonly contain minor amounts of the precious metals platinum and palladium. Consideration of the genesis of the magmas thought to be responsible for the formation of gold-rich alkalic porphyries suggests that these magmas should be at least as rich in platinum and palladium as they are in gold. Since the ores of copper and gold contain relatively low concentrations of platinum and palladium, the fate of these precious metals remains a mystery. The proposed project will systematically examine all of the rocks associated with a well-described copper-gold alkalic porphyry using precise and sensitive assay methods to detect platinum and palladium even at concentrations far below economic grades. The results will be used to attempt to detect and describe the behaviour of platinum and palladium in the porphyry deposit environment, with the aim of showing where the missing metal has been deposited. Since platinum and palladium are expected to have been present in the system initially, and they are not found in large amounts in the copper-gold ore, it is likely that they have been deposited in other nearby rocks affected by flow of hot fluids associated with the ore-forming system. Such deposits may turn out to be dispersed at such low concentrations that they are insignificant economically, however recognition of platinum and palladium ores is difficult because they are economically interesting at grades of only a few parts per million, far below levels at which the ore minerals are detectable with the naked eye. It is therefore also possible that high-grade zones of platinum and palladium will be encountered that have never previously been recognized. The work will provide New Gold Inc and other Canadian mining companies with new insight into the distribution of precious metals in Canadian mineral deposits.**

加拿大主要生产铜和黄金的生产都来自称为碱性斑岩沉积物的沉积物。 这些沉积物是由一种被认为是通过俯冲带对地壳深处的地幔熔化而得出的一种火成岩侵入式的类型的。 尽管这些沉积物是用于铜和黄金的开采，但矿石通常包含少量的贵金属铂和钯。 考虑到岩浆的起源，被认为是造成金富含金碱的形成的原因表明，这些岩浆至少应该像铂和钯一样丰富。 由于铜和金的矿石含有相对较低的铂和钯，因此这些贵金属的命运仍然是一个谜。 拟议的项目将使用精确且敏感的测定方法系统地检查与描述良好的铜金碱斑岩相关的所有岩石，即使以远低于经济成绩的浓度，也可以检测到铂和钯。 结果将用于试图检测和描述斑岩沉积环境中铂和钯的行为，以显示缺失金属沉积的位置。 由于最初预计铂和钯有望在系统中存在，并且在铜矿矿石中没有大量发现，因此它们很可能已沉积在其他附近的岩石中，这些岩石受与矿石形成系统相关的热流体流动影响的附近岩石。 这种沉积物可能会以低浓度以使其在经济上微不足道的浓度分散，但是对铂和钯矿石的认识很困难，因为它们在每百万只少数几个份量上，在经济上很有趣，远低于矿石矿物质的水平，远低于肉眼。 因此，还可能遇到从未被认识到的铂和钯的高级区域。这项工作将为新黄金公司和其他加拿大矿业公司提供有关加拿大矿物质中贵金属分配的新见解。**