MT Survey of the Kaapvaal Craton

卡普瓦尔克拉通 MT 勘测

• 批准号: 0309584
• 负责人: Robert Evans
• 金额: --
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-01 至 2007-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0309584&HistoricalAwards=false
• 关键词: MT; Survey; Kaapvaal; Craton

0309584EvansCentral to our understanding of continental evolution is providing a better understanding of how the mantle participated in the growth and stabilization of ancient cratons. This is a project involving a series of magnetotelluric (MT) transects crossing the Kaapvaal craton in southern Africa and its bounding terranes, probing the crust, lithosphere and asthenosphere with sufficient station density to provide a 3D cross sectional electrical image of the craton. The electrical structure of the mantle is impacted by thermal structure, by the presence of conducting phases such as graphite and dissolved hydrogen, and where applicable, by interconnected melt. Many of the processes thought to be involved in continental accretion result in characteristic geometries and structures that MT surveys can help identify.The experiment is an international collaboration, involving US and Canadian PIs working with scientists in Africa and also involving colleagues from Germany. The PIs will collaborate closely with South African academics and students and they will train them in MT data acquisition, data processing and modeling. The project has been motivated by a previous multi-disciplinary Continental Dynamics project to study the structure and evolution of the Kaapvaal craton. The PIs will host a workshop in the second year of the project at which they will integrate their results with those of the previous Kaapvaal project.

0309584 evansCentral我们对大陆进化的理解正在更好地理解地幔如何参与古代克拉通的生长和稳定。 这是一个涉及一系列磁铁性（MT）样本的项目，横穿南部非洲的Kaapvaal craton及其边界地形，探测了craton的3D横截面电图像，探测了地壳，岩石圈和运动层的高度。 地幔的电结构受热结构的影响，存在诸如石墨和溶解的氢之类的传导阶段，以及在适用的情况下通过互连熔体的影响。 被认为与大陆积聚有关的许多过程导致MT调查可以帮助识别的特征几何和结构。该实验是国际合作，涉及我们和加拿大的PIS与非洲的科学家合作，还涉及来自德国的同事。 PI将与南非学者和学生密切合作，他们将在MT数据获取，数据处理和建模中培训他们。 该项目是由先前的多学科大陆动力学项目激励的，该项目研究了Kaapvaal Craton的结构和演变。 PI将在项目的第二年举办一个研讨会，将其与以前的Kaapvaal项目的结果相结合。