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Modelling of complex hydrothermal ore-forming fluids in multi-episodic tectonic terranes

Modelling of complex hydrothermal ore-forming fluids in multi-episodic tectonic terranes
多幕式构造地体复杂热液成矿流体模拟
批准号:
217031-2008
负责人:
Marshall, Daniel
金额:
$1.82万
依托单位:
依托单位国家:
加拿大
项目类别:
Discovery Grants Program - Individual
财政年份:
2010
资助国家:
加拿大
项目状态:
已结题
起止时间:
2010-01-01 至 2011-12-31

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中文摘要
翻译
矿床及其相关的蚀变晕是罕见和独特的地质现象,为观察和记录地球在各种压力、温度和时间条件下的构造和流体演化提供了宝贵的窗口。将利用对选定的矿床类型的详细研究,包括浅成热液、与侵入有关的和剪切带赋存的金、铁氧化物铜金和宝石(特别是祖母绿),在加拿大科迪勒拉和其他比较造山带的关键地区建立矿床模型和其宿主地体的构造变质历史。这项研究将使用详细的测绘、岩相学、热力学平衡和各种现代分析技术,包括扫描电子显微镜、能量色散光谱、电子探针矿物分析、流体包裹体研究、激光烧蚀电感耦合质谱仪、拉曼光谱、碳、氧和S稳定同位素分析,来确定选定的经济和次经济矿床中特定矿物平衡的压力和温度。矿石和主岩的年龄将通过地质测绘和放射性测年技术确定,如适用的话,如Ar/Ar、Rb/Sr、Sm/Nd和U/Pb同位素研究。这些数据还将提供与该构造背景下大陆裂解和流体成矿热液事件有关的信息。此外,还将开发一种利用声致发光和声化学研究流体包裹体成分的新技术。
英文摘要
Ore deposits and their associated alteration haloes are rare and unique geologic occurrences that provide valuable windows through which to observe and document the tectonic and fluid evolution of Earth over a wide range of pressure, temperature and time conditions. Detailed examination of selected deposit types including; epithermal, intrusion-related and shear-zone hosted gold, iron-oxide copper gold, and gemstones (specifically emerald) will be utilized to establish ore deposit models and tectono-metamorphic histories of their host terranes in key areas of the Canadian Cordillera and other comparative orogens. This research will determine the pressures and temperatures of specific mineral equilibria within selected economic and sub-economic ore deposits, using detailed mapping, petrography, thermodynamic equilibria and a variety of modern analytical techniques including scanning-electron microscopy, energy dispersive spectroscopy, electron microprobe mineral analyses, fluid inclusion studies, laser-ablation inductively coupled mass spectrometry, Raman spectroscopy, C, O, and S stable isotope analyses. The ages of the ore and host rocks will be determined using geological mapping and radiometric dating techniques such as Ar/Ar, Rb/Sr, Sm/Nd and U/Pb isotope studies where applicable. These data will also provide information pertinent to continental break up and fluid mineralizing hydrothermal fluid events in this tectonic setting. In addition, the development of a novel technique to study fluid inclusion compositions using sonoluminescence and sonochemistry will be undertaken.
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Application of tri-colour photomultiplier technologies to enhance cathodoluminescence imaging
  • 批准号:
    485447-2015
  • 项目类别:
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  • 依托单位:
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  • 依托单位:
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  • 负责人:
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