Volcanological, structural, and metamorphic reconstruction of the Snow Lake VMS district

雪湖 VMS 区的火山、构造和变质重建

• 批准号: 430238-2012
• 负责人: Gibson, Harold
• 金额: $ 3.14万
• 依托单位: Laurentian University of Sudbury
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=552540
• 关键词: Volcanological; structural; metamorphic; reconstruction; Snow

Volcanogenic massive sulphide (VMS) deposits are copper, zinc and lead deposits that form by the precipitation of metals from black smokers on the sea floor. The deposits form along mid-oceanic ridges, in oceanic volcanic island arcs, and in basins behind the arcs. In ancient rocks, VMS deposits are typically found in volcanic island arc and back arc environments, likely due to the preservation of arc versus mid-oceanic ridge environments. These deposits produce a significant proportion of the world's supply of zinc and are important source of copper and silver as well as rare metals that are used by the "high-tech" industry sector. In Manitoba, VMS deposits are associated with the Snow Lake volcanic island arc and backarc that formed early during the opening of the ancient Manikewan Ocean and were deformed during closure of this ocean due to the movement and collision of tectonic plates. The goal of our project is to reconstruct the tectonic, magmatic, volcanic and metamorphic evolution of the Snow Lake volcanic island arc in order to better understand the metallogenesis of its contained VMS deposits, and to provide new constraints on the evolution and metallogeny of ancient arc volcanic sequences in northern Manitoba and Saskatchewan. The direct beneficiary of the new knowledge generated, and of the highly-qualified geoscientists trained during this research, is the Canadian mining and exploration industry who explore for VMS and related ore deposits in Canada, and globally, and indirectly the many rural, northern Canadian communities that depend on mining as their main economic driver. The minerals and mining sector contributes significantly to the Gross Domestic Product (GDP) of Canada, ($32 billion in 2009) and mining accounts for 19% of Canada's goods exports. Successful exploration is crucial to the sustainability of the Canadian Mining Industry and, therefore, to the well being of all Canadians.

火山生成的巨大硫化物（VM）沉积物是铜，锌和铅沉积物，它们是由于海底黑人吸烟者的沉淀而形成的。沿着海洋火山岛弧和弧后盆地中的海洋山脊，海洋岛弧中的矿床形成。 在古老的岩石中，VMS沉积物通常在火山岛弧和后弧环境中发现，这可能是由于保存电弧与中洋脊环境的环境。 这些沉积物产生了世界上锌供应的很大一部分，并且是铜和白银的重要来源以及“高科技”行业使用的稀有金属。 在曼尼托巴省，VMS矿床与在古代Manikewan海洋开放期间早期形成的雪湖火山岛弧和后弧相关，并在闭合这层海洋的过程中由于构造板的运动和碰撞而变形。 我们项目的目的是重建雪湖火山岛弧的构造，岩浆，火山和变质的演变，以便更好地了解其含有的VMS沉积物的金属作用，并对Northern Manitoba and Saskatchatewan和Saskatchatewan的古代ARC Volcanic序列的进化和金属构成新的约束。在这项研究期间培训的新知识以及受过培训的高度地球科学家的直接受益者是加拿大采矿和勘探行业，他们探索了加拿大，全球以及全球以及许多农村北部，加拿大北部社区的探索，依赖于采矿作为主要经济司机。矿产和矿业部门对加拿大的国内生产总值（GDP）（2009年的320亿美元）贡献了重大贡献，矿业占加拿大商品出口的19％。成功的探索对于加拿大采矿业的可持续性至关重要，因此对于所有加拿大人的福祉至关重要。