Electromagnetic studies of the evolution of the continents

大陆演化的电磁研究

• 批准号: 238536-2010
• 负责人: Unsworth, Martyn
• 金额: $ 3.13万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=514383
• 关键词: Electromagnetic; studies; evolution; continents

Plate tectonics has formed the present day continents over the course of Earth history. The continents have grown through a range of processes that include continent-continent collisions and volcanic activity. The proposed research will study how these processes occur today and this will give insight into how the continents evolved in the past. This research will use geophysical imaging of the subsurface to study the properties of the Earth's crust and mantle from the surface to a depth of 200 km in two locations. This will use a technique called magnetotellurics that utilizes low frequency radio waves to image the subsurface resistivity - a parameter that is sensitive to the presence of water and partially molten rock.

板块构造在地球历史进程中形成了今天的大陆。大陆的生长经历了一系列过程，包括大陆与大陆的碰撞和火山活动。拟议的研究将研究这些过程是如何在今天发生的，这将使人们深入了解大陆在过去是如何演变的。这项研究将利用地下的地球物理成像来研究从地表到两个地点200公里深处的地壳和地幔的性质。这将使用一种名为大地电磁的技术，该技术利用低频无线电波来成像地下电阻率--这是一个对水和部分熔岩的存在敏感的参数。