Gloria, Sea Beam, Geophysical Investigation of the Juan Fernandez Microplate at the Pacific Antarctic-Nazca Triple ction

格洛丽亚，海束，太平洋南极纳斯卡三重作用胡安·费尔南德斯微板块的地球物理调查

• 批准号: 8917630
• 负责人: Roger Larson
• 金额: $ 41.32万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-04-01 至 1995-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8917630&HistoricalAwards=false
• 关键词: Gloria; Sea; Beam; Geophysical; Investigation

The Juan Fernandez microplate occupies the Pacific, Nazca, Antarctic triple junction, an open--ocean, divergent structure un complicated by hotspots, a seismic ridges or adjacent continents. This setting, coupled with a high magnetic inclination, make this microplate ideal for studying the tectonic evolution of microplates and their relationship with triple junctions. This study will obtain complete ensonification of microplate using the GLORIA side-scan system and will collect Seabeam, magnetics, and gravity data. One of the principal investigators (Schouten) has proposed that microplate motion can be modeled as a circular and rigid body rotating about a "plate specific" pole located on the microplate. This model was developed and tested for the Easter and Galapagos microplates; thus , the work proposed here becomes a test of the "ball-bearing" model, and a test of relative motion solutions previously proposed.

胡安费尔南德斯微板块占据了太平洋，纳斯卡， 南极三角洲，开阔洋，辐散构造， 复杂的热点，地震脊或邻近大陆。 这种设置，再加上高磁倾角，使得 研究微板块构造演化的理想微板块 以及它们与三联点的关系。 本研究将获得完整的声透射微孔板， 格洛丽亚侧扫描系统，将收集Seabeam，磁力， 重力数据。 主要研究者之一（Schouten） 提出微板的运动可以被模拟为一个圆形 刚体绕着一个“板特定”的极点旋转， 微型板。 这个模型是为复活节开发和测试的 和加拉帕戈斯微板;因此，这里提出的工作成为一个 “滚珠轴承”模型的测试和相对运动的测试 以前提出的解决方案。