Understanding trace element sourcing in ancient and modern seafloor volcanogenic massive sulfides

了解古代和现代海底火山成因块状硫化物中微量元素的来源

• 批准号: 342440-2007
• 负责人: LaytonMatthews, Daniel
• 金额: $ 1.41万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=366415
• 关键词: Understanding; trace; element; sourcing; ancient

Volcanogenic massive sulfide (VMS) deposits contain some of Canada's most significant sources of copper, lead, zinc, gold and silver, and are thought to have formed within submarine volcanoes similar to those presently forming on the modern seafloor. This proposed research will examine deposits hosted within ancient seafloor volcanic rocks and will investigate mineral and chemical changes associated with the interaction of hot metal-rich fluids with seawater, sedimentary and volcanic rocks.  This research will focus on the origin, formation and setting of these submarine sedimentary and volcanic rocks.  By improving our understanding of VMS deposits and their associated rocks, I will be able to provide predictive methods for the discovery, exploration, and exploitation of these important metal resources.This research would establish one of very few laboratories quantitatively analyzing trace elements in sulfide minerals from VMS deposits. Additionally, this proposed research will help establish the World's only laboratory routinely measuring Se, Cu, and Te isotopic ratios in geological material from ore systems. It is anticipated that through the application of these new laboratories by my students, collaborators and I, coupled with traditional geological methods of fieldwork, petrography and traditional isotope systems, we will provide an immediate growth in our knowledge on the distribution of trace elements in VMS systems on the seafloor and those in the geological record. As in most new method development, it is anticipated that the knowledge gained in this research will be applicable outside ore deposits research and pertinent to Earth System Science as a whole.

火山成因块状硫化物（VMS）矿床含有加拿大一些最重要的铜、铅、锌、金和银的来源，被认为是在海底火山中形成的，类似于目前在现代海底形成的火山。这项拟议的研究将检查古代海底火山岩中的矿床，并将调查与富含金属的热流体与海水、沉积岩和火山岩相互作用有关的矿物和化学变化。本文将重点研究这些海底沉积岩和火山岩的成因、形成和环境。通过提高我们对VMS矿床及其伴生岩石的认识，我将能够为这些重要金属资源的发现、勘探和开采提供预测方法。这项研究将建立为数不多的定量分析VMS矿床中硫化物矿物微量元素的实验室之一。此外，这项拟议的研究将有助于建立世界上唯一的实验室，常规测量来自矿石系统的地质物质中的Se， Cu和Te同位素比率。预计通过我的学生、合作者和我对这些新实验室的应用，再加上传统的实地考察、岩石学和传统同位素系统的地质方法，我们将在海底VMS系统和地质记录中提供关于微量元素分布的知识的直接增长。正如大多数新方法的发展一样，预计在这项研究中获得的知识将适用于矿床研究之外，并与整个地球系统科学相关。