Modelling an Airborne Time-Domain Electromagnetic (TDEM) System using a Novel Integral Formulation

使用新型积分公式对机载时域电磁 (TDEM) 系统进行建模

• 批准号: 515291-2017
• 负责人: Teyssedou, Alberto
• 金额: $ 1.82万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=639667
• 关键词: Modelling; Airborne; Time; Domain; Electromagnetic

Time-Domain Electromagnetic (TDEM) systems are instruments designed to detect electromagnetic fields andare used, among other applications, to measure weak signals generated by mineral deposits found deep withinthe Earth's shell. This detection is achieved by emitting very intense time-varying electromagnetic fields thatinteract with these deposits. In turn, the soil's electromagnetic response induces, within a detection device,signals that are greater than the background or instrumentation noise. Therefore, they can be used by the miningindustry as a fingerprint of the nature and quantity of minerals. That being said, it is obvious that in order toproperly interpret the data, a physically-coherent model must be employed. In the context of this proposal, anovel integral method will be used to model the electromagnetic response of mineral deposits located at severalhundred meters beneath the Earth's surface. This model will help Geophysics GPR International Inc. (aQuébec-based company) take into account local variations in the soil's electrical conductivity and consequentlyrefine their current calculation model. Once the methodology will be fully implemented, it is expected that itwill help GPR's operations and consequently contribute towards the development of Canada's mining industry.

时域电磁（TDEM）系统是设计用于探测电磁场的仪器，除其他应用外，还用于测量地壳深处发现的矿床产生的微弱信号。这种探测是通过发射与这些沉积物相互作用的非常强烈的时变电磁场来实现的。反过来，土壤的电磁响应在检测设备内感应出大于背景或仪器噪声的信号。因此，它们可以被采矿业用作矿物性质和数量的指纹。话虽如此，很明显，为了正确解释数据，必须采用物理连贯的模型。在这一建议的背景下，一个新的积分方法将被用来模拟电磁响应的矿床位于几百米以下的地球表面。该模型将有助于地质雷达国际公司。(aQu公司）考虑到当地土壤电导率的变化，从而改进了他们目前的计算模型。一旦该方法得到全面实施，预计将有助于GPR的业务，从而促进加拿大采矿业的发展。