The Genesis and Evolution of Metallic Ore Deposits Systems: Insights and Constraints from Mineralogy.

金属矿床系统的起源和演化：矿物学的见解和约束。

• 批准号: RGPIN-2017-05883
• 负责人: McDonald, Andrew
• 金额: $ 1.6万
• 依托单位: Laurentian University of Sudbury
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=751199
• 关键词: Genesis; Evolution; Metallic; Ore; Deposits

Intrusion-related Au and magmatic Fe-Ni-Cu-PGE ore deposits are the most important sources of metallic minerals produced in Canada. With increasing demands being made for the strategic metals produced, there is a critical need to better understand how the minerals that host these elements and their ore deposits, form and change through time, in an effort to improve exploration methods and enhance mineral-processing techniques. To achieve this, research will be conducted into the crystal-chemistry and geological occurrence of two widespread groups of minerals: precious-metal (gold, platinum-group elements) minerals and base-metal sulfides of the pyrrhotite family. Despite the direct relevance of these mineral groups to ore deposits and the impact that a better understanding of them would have on ore-deposit research, our knowledge of what these minerals are and what they can indicate about rocks in which they develop is generally lacking. This can be attributed to: (i) their occurrence in complex intergrowths and small grain-sizes; (ii) variable, poorly defined, chemistries and crystal structures and (iii) comprehensive studies that integrate mineralogical data with geological data (structures, fluids, etc.). The proposed research is novel in scope as it will address the very basic components of ore deposits, the minerals themselves, filling knowledge gaps that exist in our understanding of the distribution and character of these minerals. The program will build upon the existing strengths and expertise of the applicant and will involve a significant training component that will increase the number of highly qualified personnel available to the mining and minerals sector. It will involve existing and novel, lab-based techniques required to address the complex, atomic-scale issues related to these minerals, complimented by larger-scope, field-based studies that will provide firm data related to the provenance and geological history of the rocks in which the minerals occur. The research goals of the program will be to: (1) document the crystal-chemical variations in precious-metal minerals and pyrrhotite that exist; (2) derive information regarding conditions of formation, based on the chemistry and crystal structures of these minerals and (3) apply the data obtained to understand how ore deposits develop and evolve through time.

与侵入岩有关的Au和岩浆铁镍铜铂族元素矿床是加拿大最重要的金属矿产来源。 随着对所生产的战略金属的需求日益增加，迫切需要更好地了解这些元素所在的矿物及其矿床是如何形成和随时间变化的，以努力改进勘探方法和提高矿物加工技术。为实现这一目标，将研究两类广泛存在的矿物的晶体化学和地质产状：贵金属（金、铂族元素）矿物和磁黄铁矿族贱金属硫化物。 尽管这些矿物群与矿床直接相关，而且更好地了解它们会对矿床研究产生影响，但我们对这些矿物是什么以及它们对它们所发育的岩石的指示作用的了解普遍缺乏。 这可以归因于：（i）它们以复杂的共生体和小粒度的形式出现;（ii）化学和晶体结构多变、定义不清;（iii）综合矿物学数据和地质数据（结构、流体等）的全面研究。 拟议的研究在范围上是新颖的，因为它将解决矿床的基本组成部分，矿物本身，填补我们对这些矿物的分布和特征的理解中存在的知识空白。 该计划将建立在申请人的现有优势和专业知识的基础上，并将涉及一个重要的培训部分，这将增加采矿和矿产部门的高素质人员的数量。 它将涉及现有的和新的，以实验室为基础的技术，以解决与这些矿物有关的复杂的，原子级的问题，辅之以更大范围的，以实地为基础的研究，将提供与矿物发生的岩石的来源和地质历史有关的可靠数据。 该计划的研究目标将是：（1）记录存在的贵金属矿物和磁黄铁矿的晶体化学变化;（2）根据这些矿物的化学和晶体结构获得有关形成条件的信息;（3）应用所获得的数据来了解矿床如何随着时间的推移而发展和演变。