Mineralogical and Geochemical Study of the Ni-Cu-Co-Au-Ag-PGE Sulfides of the Discovery Zone, Nickel Mountain Gabbro Complex, British Columbia

不列颠哥伦比亚省镍山辉长岩杂岩发现区镍-铜-钴-金-银-铂族元素硫化物的矿物学和地球化学研究

• 批准号: 540137-2019
• 负责人: Linnen, Robert
• 金额: $ 2.74万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=698922
• 关键词: Mineralogical; Geochemical; Study; Ni; Cu

The E&L deposit in the Nickel Mountain Gabbro Complex is the second largest known zone of magmatic nickel-copper sulfide mineralization in British Columbia and the first to be discovered within the Eskay Rift. The proposed research will examine a zone of unusually high-grade massive sulfide Ni-Cu-PGE mineralization, largely hosted by metasedimentary rocks adjacent to the E&L Intrusion. The mineralization, known as the Discovery Zone, was discovered in 2016 by Garibaldi Resources Corp. (GRC), but the origin of the mineralization remains poorly understood. The massive sulfide sheet shows systematic changes in the concentrations of Ni, Cu, Co, and precious metals from base to top. This offers a unique and new opportunity to understand the mechanisms responsible for the differentiation of sulfide melts. The objectives of this project are to identify the geological controls of the mineralization within the Discovery Zone and to understand how the compositional diversity within the sheet originated, and how this mineralization relates to the disseminated and massive sulfides hosted by the variable-textured olivine gabbro of the E&L Intrusion. The study will utilize primary field and drill core observations, whole-rock sulfide geochemistry, and mineral textural and compositional data to evaluate the relative roles of primary magmatic versus late magmatic and post-magmatic controls on the composition of the mineralization. These data will be used to produce a genetic model for the Discover Zone mineralization, which will be used to assess and improve GRC's exploration strategy in the search for additional sulfide mineralization within the Nickel Mountain Gabbro Complex.

镍矿辉长岩杂岩中的E&L存款是不列颠哥伦比亚省已知的第二大岩浆镍铜硫化物矿化带，也是在埃斯凯裂谷中发现的第一个矿床。拟议的研究将检查异常高品位块状硫化物Ni-Cu-PGE矿化带，主要由E&L侵入体附近的变质沉积岩承载。该矿化区被称为发现区，于2016年由Garibaldi Resources Corp.（GRC）发现，但矿化的起源仍然知之甚少。块状硫化物片显示Ni、Cu、Co和贵金属的浓度从底部到顶部的系统变化。这提供了一个独特的和新的机会，了解负责硫化物熔体的分化机制。本项目的目标是确定发现区内矿化的地质控制，并了解岩片内成分多样性的起源，以及该矿化与E&L侵入体的可变结构橄榄石辉长岩中的浸染状和块状硫化物的关系。该研究将利用主要的现场和钻孔岩芯观察，全岩硫化物地球化学，矿物结构和成分数据，以评估相对的作用，原生岩浆与晚期岩浆和岩浆后控制的矿化成分。这些数据将用于生成发现区矿化的成因模型，该模型将用于评估和改进GRC在镍矿辉长岩杂岩内寻找其他硫化物矿化的勘探策略。