The Enhancement of Magnetotelluric Surveying via Natural Wave Field Predictions and Artificial Wave Injection Experiments

通过自然波场预测和人工波注入实验增强大地电磁测量

• 批准号: ST/G003483/1
• 负责人: Timothy Yeoman
• 金额: $ 23.07万
• 依托单位: University of Leicester
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2009
• 资助国家: 英国
• 起止时间: 2009 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FG003483%2F1
• 关键词: Enhancement; Magnetotelluric; Surveying; via; Natural

Magnetotelluric (MT) techniques, which employ ultra low frequency electromagnetic waves in order to reveal subsurface geological structures are becoming increasingly important tools for geological exploration, particularly under conditions where standard seismic methods are expensive to implement or produce ambiguous results. A major drawback of present MT methods is a reliance on sporadically occurring natural sources of such waves or highly localised controlled sources in the form of a small transmitter towed along by an ocean going survey vessel. Over the past three decades techniques have been developed which allow ultra low frequency electromagnetic waves to be artificially excited in the Earth's upper atmosphere by irradiating it with modulated high power, high frequency radio waves from ground-based transmitters. This programme will explore the use of such experiments, and the forecasting of naturally-occurring waves, in order to improve the efficiency and cost-effectiveness of current MT survey techniques.

使用超低频率电磁波来揭示地下地质结构的磁铁（MT）技术正在成为地质探索的越来越重要的工具，尤其是在标准地震方法实施或产生模棱两可的结果的条件下。当前MT方法的主要缺点是依赖这种波浪的自然来源或高度局部的受控来源，其形式是由海洋前进的测量船拖曳的小型发射器。在过去的三十年中，已经开发了技术，从而使超低频率电磁波在地球上层大气中通过调制的高功率，高频无线电波从地面发射器进行照射，从而在地球上层大气中进行人工兴奋。该程序将探索此类实验的使用以及对自然波浪的预测，以提高当前MT调查技术的效率和成本效益。