1992-1997 Epoch GPS Geodesy in the North Andes

1992-1997年北安第斯山脉GPS大地测量

• 批准号: 9219270
• 负责人: James Kellogg
• 金额: $ 34.21万
• 依托单位: University of South Carolina at Columbia
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-05-01 至 1998-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9219270&HistoricalAwards=false
• 关键词: 1992; 1997; Epoch; GPS; Geodesy

This project represents an opportunity for US scientists to continue cooperation with scientists from Colombia, Costa Rica, Ecuador, Germany, Panama, Switzerland, and Venezuela in the epoch measurements in the Central and South America (CASA) network. This is a field program to obtain precise repeat GPS baseline measurements between 45 sites in the North Andean convergent margin. The observations will include: 1) short baselines across the Colombia trench (400 km) and the Middle America trench (540 km) where we can directly measure rapid subduction rates. 2) A survey network across the South Caribbean deformed belt will test predictions of aseismic subduction of Caribbean oceanic crust beneath the North Andes. 3) Baseline observations across the active Santa Marta, Romeral, and East Andean fault systems test predicted shear strain models for the North Andean microplate.

该项目为美国科学家提供了一个继续与哥伦比亚、哥斯达黎加、厄瓜多尔、德国、巴拿马、瑞士和委内瑞拉的科学家在中南美洲(CASA)网络中进行纪元测量合作的机会。这是一个现场计划，目的是在北安第斯会聚边缘的45个站点之间获得精确的重复GPS基线测量。观测将包括：1)跨越哥伦比亚海沟(400公里)和中美洲海沟(540公里)的短基线，在那里我们可以直接测量快速俯冲速度。2)一个横跨南加勒比海变形带的调查网络将检验北安第斯山脉之下加勒比海地壳无地震俯冲的预测。3)活动的圣玛尔塔、罗梅勒和东安第斯断裂系统的基线观测测试了北安第斯微板块的剪切应变模型。