Controls on gold mineralization in high-grade metamorphic rocks, Borden, Chapleau, Ontario

对高品位变质岩金矿化的控制，博登，查普洛，安大略省

• 批准号: 452967-2013
• 负责人: Pan, Yuanming
• 金额: $ 0.73万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 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=575581
• 关键词: Controls; gold; mineralization; grade; metamorphic

This application, following on a recently completed Engage project (12/2012 to 05/2013), requests support for a collaborative research between the University of Saskatchewan and Probe Mines Limited to further investigate the Borden gold deposit. The Borden gold deposit, discovered in November 2010, is characterized by its association with high-grade metamorphic rocks between the Kapuskasing Structural Zone and the Wawa Gneiss Domain in the Superior Province. Gold mineralization in Canada and elsewhere is typically hosted in unmetamorphosed or low- to medium-grade metamorphic lithologies that formed in the upper crust, such as the nearby Timmins gold mines in the Abitibi subprovince. The Borden deposit hosted in lithologies that formed in mid-to-lower crust represents the possible upper limits of temperature, crustal depth, and gold mineralization in Canada and the world. Therefore, research on the unique Borden deposit will provide new insights into gold mineralization and facilitate new exploration and mining activities in other high-grade metamorphic terranes in Canada. The specific objectives of this proposed research include: 1) systematic regional to outcrop-scale geological mapping of the Borden deposit and its surrounding area into the Kapuskasing Structural Zone and the Wawa Gneiss Domain, including the use of a Trimble GPS system, 2) systematic collection of samples from both outcrops and drill cores to establish spatial relationships between gold mineralization and lithology, alteration, metamorphism, and structure using field mapping techniques, petrography, electron microprobe, scanning electron microscope, and fabric analyzer, 3) document pressure-temperature-fluid composition of metamorphism, gold mineralization and alteration at the Borden deposit, 4) establish a temporal relationship among gold mineralization, metamorphism, and deformation using radiogenic isotope geochronological analyses, 5) investigate rheological controls on gold mineralization, and 6) establish a new deposit model for gold mineralization in high-grade metamorphic terrains. This project provides excellent training opportunities for one PhD and three HBSc students at the University of Saskatchewan.

该申请是在最近完成的Engage项目（2012年12月至2013年5月）之后提出的，要求支持萨斯喀彻温大学和Probe Mines Limited之间的合作研究，以进一步调查Borden金矿存款。2010年11月发现的Borden金存款矿床的特点是与上级省Kapuskasing构造带和Wawa片麻岩域之间的高级变质岩有关。加拿大和其他地方的金矿化通常位于上地壳中形成的未变质或低至中等变质的岩石中，例如附近Abitibi次省的Timmins金矿。Borden存款的岩石中形成的中下地壳代表了可能的上限温度，地壳深度和金矿化在加拿大和世界。因此，对独特的博登存款的研究将提供新的见解，金矿化，并促进新的勘探和开采活动，在加拿大的其他高级变质矿床。这项拟议研究的具体目标包括：1）对博登存款及其周边地区到卡普斯卡辛构造带和瓦瓦片麻岩域进行系统的区域到露头规模的地质测绘，包括使用特林布尔GPS系统，2）从露头和钻孔岩芯系统收集样品，以建立金矿化与岩性、蚀变、变质作用之间的空间关系，和构造; 3）记录Borden存款变质、金矿化和蚀变的压力-温度-流体成分; 4）利用放射性同位素年代学分析建立金矿化、变质和变形之间的时间关系，（5）探讨流变学对金成矿的控制作用;（6）建立高级变质地体金成矿的新存款模式。该项目为萨斯喀彻温大学的一名博士和三名HBSc学生提供了极好的培训机会。