Geophysical tools to explore for mineral and hydrogeological resources

用于勘探矿产和水文地质资源的地球物理工具

• 批准号: RGPIN-2019-04874
• 负责人: Smith, Richard
• 金额: $ 3.13万
• 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: 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=715222
• 关键词: Geophysical; tools; explore; mineral; hydrogeological

This proposal describes ongoing projects to develop geophysical tools that will allow people to determine what is hidden below the subsurface by measuring fields on the surface of the earth or down the occasional boreholes that are drilled to investigate the subsurface. One set of tools involve measuring electromagnetic fields where the intent is to look for conductive features such as valuable nickel and copper deposits that could be mined to the benefit of the Canadian economy. These deposits have generally been found where the deposits are shallow, so a tool that can look for deeper deposits is required. The innovation that will enable deeper investigation is to use a transmitter that has three transmitter coils oriented in three different directions, rather than the standard single coil pointing in one direction. Student projects will involve developing this system, testing it and processing and interpreting the data collected. The second set of tools involve measuring small perturbations in the magnetic field of the Earth. In this project, a student will be developing an innovative methodology to create images of the data that have fewer artifacts and look more like the subsurface geology. This will enable people to more easily interpret the source of the perturbations below the subsurface. This will enable a better understanding of the geology and will assist in resource exploration. The third set of tools measures the nuclear magnetic resonance associated with protons in the subsurface. These protons are primarily associated with water, so the tool is used to look for groundwater in arid areas. The innovation in this project is for a student to develop a tool that can be carried by aircraft and find this water quickly and easily. However, the airborne results are low resolution and the airborne tool will likely have a shallow penetration. Nonetheless, the results should enable hydrogeologists to select locations on the ground where higher resolution and deeper penetration investigations can be undertaken. A final innovation is for a student to develop a computer application that will allow practitioners and students to understand the character of the electromagnetic responses that are measured with tools such as those described in the second paragraph above. This will allow people to determine the subsurface conductive feature that is the source of the electromagnetic fields. In this case, the innovation is that the source can be buried below a conductive surface layer and the computations can be undertaken relatively quickly.

该提案描述了正在进行的项目，以开发地球物理工具，以使人们能够通过测量地球表面或偶尔钻孔以调查地下的井眼来确定地下下方隐藏的内容。 一组工具涉及测量电磁场，目的是寻找导电特征，例如有价值的镍和铜矿矿床，这些镍和铜矿床可以开采为加拿大经济带来利益。通常在存款浅的地方找到了这些沉积物，因此需要一个可以寻找更深层存款的工具。能够更深入研究的创新是使用一种发射器，该发射器的三个变送器线圈以三个不同的方向为导向，而不是指向一个方向的标准单线圈。学生项目将涉及开发该系统，对其进行测试以及处理和解释所收集的数据。 第二组工具涉及测量地球磁场中的小扰动。 在这个项目中，学生将开发一种创新的方法，以创建具有较少伪影的数据图像，并且看起来更像地下地质。这将使人们能够更轻松地解释地下下方扰动的来源。 这将使人们能够更好地了解地质，并有助于资源探索。 第三组工具测量与地下质子相关的核磁共振。这些质子主要与水有关，因此该工具用于在干旱地区寻找地下水。该项目的创新是让学生开发可以由飞机携带的工具，并快速，轻松地找到该水。但是，空降结果是低分辨率，空降工具可能会具有较浅的穿透性。但是，结果应使水文地质学家能够在可以进行更高分辨率和更深入的渗透研究的地点选择地点。 最终的创新是让学生开发计算机应用程序，该应用程序将允许从业者和学生理解电磁响应的特征，这些响应的特征是用上面第二段中描述的工具来衡量的。这将使人们能够确定是电磁场来源的地下导电特征。在这种情况下，创新是可以将源埋在导电表面层以下，并且可以相对较快地进行计算。