Micro X-ray diffraction as a discrimination tool for diamond exploration, using the mineral structures of ilmenite and chromite

利用钛铁矿和铬铁矿的矿物结构，微 X 射线衍射作为钻石勘探的辨别工具

• 批准号: 533705-2018
• 负责人: Flemming, Roberta
• 金额: $ 1.82万
• 依托单位: University of Western Ontario
• 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=650849
• 关键词: Micro; ray; diffraction; discrimination; tool

In 2017, the minerals industry in Canada saw $44 billion in mineral production as well as $4 billion in capital investments for mineral processing; Hundreds of millions of dollars was spent on research and development and the minerals industry has created 634,000 jobs for Canadians (NRCAN 2018). Headquartered in Vancouver, BC, North Arrow Minerals Inc. is a dynamic Canadian company exploring for diamonds across Canada. Conventional exploration methods employ chemical analysis of Kimberlite Indicator Minerals (KIMs) to determine the presence of kimberlites and their diamond potential. We propose to team up with North Arrow to test the application of micro X-ray diffraction (microXRD) as a new exploration tool, using Flemming's proposed two-mineral structural approach. We propose that microXRD/unit cell refinement of ilmenite and chromite populations in tandem will be a powerful new reconnaissance tool for diamond exploration. If a population of ilmenite grains have c-axis < 14.02 (±.01) Å, this indicates a kimberlitic origin. In combination with a positive kimberlite identification provided by the unit cell of ilmenite, a population of chromite grains with a-axis = 8.32 (±.01) Å indicates that the kimberlite is diamondiferous. (The chromite unit cell parameter by itself, however, is not definitive.) Our innovative two-mineral structural approach will provide North Arrow with a new method of kimberlite reconnaissance (via ilmenite unit cell) and estimation of diamond potential (via chromite unit cell), which will give them a competitive advantage in the field of diamond exploration. This method has the potential to save thousands of dollars from North Arrow's exploration budget as it reduces the necessity to process the complete suite of KIMs by Electron Probe Microanalysis (EPMA). This technique, once implemented into their exploration program, would streamline operations and may enable estimation of diamond potential of the resource prior to drilling. New exploration methods could lead to new diamond discoveries, which would provide wealth to Canada. High caliber HQP trained in Canada will be at the forefront of the next generation of diamond discoveries.********

2017年，加拿大矿业的矿产生产额为440亿加元，矿产加工的资本投资为40亿加元;数亿加元用于研发，矿业为加拿大人创造了634，000个就业机会（NRCAN 2018）。北箭矿业公司总部位于不列颠哥伦比亚省温哥华。是一家充满活力的加拿大公司，在加拿大各地勘探钻石。传统的勘探方法采用金伯利岩指示矿物（KIM）的化学分析，以确定金伯利岩的存在及其钻石潜力。我们建议与North Arrow合作，使用Flemming提出的两种矿物结构方法，测试微X射线衍射（microXRD）作为一种新的勘探工具的应用。我们建议，microXRD/晶胞细化钛铁矿和铬铁矿人口串联将是一个强大的新的勘探工具，金刚石勘探。如果钛铁矿颗粒群的c轴< 14.02（±.01）nm，则表明其为金伯利岩成因。结合钛铁矿晶胞提供的金伯利岩鉴定结果，a轴= 8.32（±.01）nm的铬铁矿颗粒群表明金伯利岩含金刚石。(The然而，铬铁矿晶胞参数本身并不确定。）我们创新的双矿物结构方法将为North Arrow提供一种新的金伯利岩勘测方法（通过钛铁矿晶胞）和金刚石潜力估计方法（通过铬铁矿晶胞），这将使他们在金刚石勘探领域具有竞争优势。这种方法有可能从North Arrow的勘探预算中节省数千美元，因为它减少了通过电子探针显微分析（EPMA）处理全套KIM的必要性。这种技术，一旦实施到他们的勘探计划，将简化操作，并可能使估计钻石潜力的资源之前，钻探。新的勘探方法可能导致新的钻石发现，这将为加拿大提供财富。在加拿大培训的高素质HQP将站在下一代钻石发现的最前沿。