"Exploring the interrelationships between subvolcanic and volcanic architecture, magmatism, tectonics and VMS deposit genesis"

“探索地下火山和火山结构、岩浆作用、构造和 VMS 沉积成因之间的相互关系”

• 批准号: 105663-2012
• 负责人: Gibson, Harold
• 金额: $ 2.77万
• 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: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=569094
• 关键词: Exploring; interrelationships; between; subvolcanic; volcanic

Volcanogenic massive sulphide (VMS) ore bodies are rare and incredibly valuable accumulations of sulphide minerals from which important industrial and precious metals such as zinc, copper, silver and gold are produced. They form during submarine volcanism where hot (>300 C), evolved, metal- and sulphur-bearing seawater, perhaps with a component derived from magmas (magmatic fluid), is discharged onto the seafloor within ancient and modern volcanoes and, due to rapid cooling, deposited sulphide minerals at, and immediately below the seafloor. The objectives of this research are to: 1) determine why some submarine volcanic successions contain VMS deposits, whereas most do not, by examining large scale features such as differences in geodynamic setting, volcanic and intrusion architecture and history, the origin of the magmas, the type and thickness of underlying ocean crust, and the depositional environment; 2) determine the importance of magmas and magmatic heat in generating and driving hot VMS hydrothermal systems by understanding the role of subvolcanic intrusion architecture, history, composition-temperature, and longevity; 3) determine the usefulness of volcaniclastic lithofacies to decipher VMS basin morphology in order to determine controls on the location and formation of the VMS deposits on the seafloor; and 4) to educate and train highly qualified personnel to replace those in an aging exploration work force, and/or to continue in research. Results of this research will benefit those who explore for VMS deposits and, as such, the Canadian mining industry will be a direct beneficiary of this research and, indirectly, so will the non-urban, northern Canadian, mining communities whose survival, growth, and prosperity are closely linked to successful exploration and responsible mining. The research will also benefit those who study the evolution of our planet through analysis of ancient and/or modern seafloor volcanoes and their contained VMS deposits.

火山块状硫化物 (VMS) 矿体是稀有且极具价值的硫化物矿物堆积物，可生产锌、铜、银和金等重要工业金属和贵金属。它们是在海底火山活动期间形成的，其中热（> 300 C）、演化的、含金属和硫的海水，可能含有源自岩浆（岩浆液）的成分，被排放到古代和现代火山内的海底，并且由于快速冷却后，硫化物矿物沉积在海底及其正下方。 本研究的目标是：1) 通过检查大尺度特征（例如地球动力学环境差异、火山和侵入结构和历史、岩浆起源），确定为什么一些海底火山序列含有 VMS 沉积物，而大多数则不然。下伏洋壳的类型和厚度以及沉积环境； 2）通过了解火山侵入结构、历史、成分-温度和寿命的作用，确定岩浆和岩浆热在生成和驱动热VMS热液系统中的重要性； 3) 确定火山碎屑岩相对于破译 VMS 盆地形态的有用性，以确定对海底 VMS 沉积物的位置和形成的控制； 4) 教育和培训高素质人员以取代老龄化勘探劳动力和/或继续从事研究。 这项研究的结果将使那些勘探 VMS 矿床的人受益，因此，加拿大采矿业将成为这项研究的直接受益者，而加拿大北部非城市采矿社区也将间接受益，这些社区的生存、发展、和繁荣与成功的勘探和负责任的采矿密切相关。这项研究还将让那些通过分析古代和/或现代海底火山及其所含 VMS 沉积物来研究地球演化的人们受益。