Collaborative Research: Collection of Marine Geophysical Data on Transits of the Nathaniel B. Palmer

合作研究：收集有关纳撒尼尔·B·帕尔默号凌日的海洋地球物理数据

• 批准号: 0338317
• 负责人: Joann Stock
• 金额: --
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-07-01 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0338317&HistoricalAwards=false
• 关键词: Collaborative; Research; Collection; Marine; Geophysical

This project will utilize the R/VIB Nathaniel B. Palmer's transit cruises to collect marine geophysical data on targets-of-opportunity in the southern oceans. Because the Palmer generally traverses regions only sparsely surveyed with geophysical instruments, this project represents a cost-effective way to collect important new data. The work's focus is expanding our knowledge of plate motion histories for the Antarctic and surrounding plates. The ultimate goals are improving global plate reconstructions and gaining new insight into general plate kinematics and dynamics and lithospheric rheology. Only slight deviations from the straight routes are required, and we expect to operate on one cruise per year over the three years of the project. The first cruise from New Zealand to Chile will survey a flow line of Pacific-Antarctic plate motion along the Menard fracture zone, which crosses the East Pacific Rise at ~50 S latitude. Swath bathymetry, gravity, magnetics, and a small amount of seismic reflection profiling will be collected to determine the exact trace of the fracture zone and its relationship to the associated gravity anomaly seen in shipboard and satellite radar altimetry data. These observations are critical for precise plate reconstructions, and will provide GPS-navigated locations of a major fracture zone near the northern end of the Pacific-Antarctic boundary. These data will be used in combination with similar data from the Pitman fracture zone at the southwestern end of the plate boundary and magnetic anomalies from previous cruises near the Menard fracture zone to improve high-precision plate reconstructions and evaluate the limits of internal deformation of the Pacific and Antarctic plates. The science plan for cruises in following years will be designed once transit schedules are set. In terms of broader impacts, we plan to teach an on-board marine geophysics class to graduate and undergraduate students on two cruises. The class consists of daily classroom lectures about the instruments and data; several hours per day of watch standing and data processing; and work by each student on an independent research project. We expect to accommodate 15 students per class, including participants from primarily undergraduate institutions with high minority enrollments.

该项目将利用R/VIB Nathaniel B. Palmer的过境巡游来收集有关南大洋目标目标目标的海洋地球物理数据。由于Palmer通常只对地球物理仪器进行稀疏调查的区域，因此该项目代表了收集重要新数据的一种经济有效的方式。这项工作的重点是扩大我们对南极和周围板的板运动历史的了解。最终目标是改善全球板的重建，并获得对通用板运动学和动力学以及岩石圈流变学的新见解。仅需要与直路的轻微偏差，我们预计在项目的三年中，每年将进行一次巡航。从新西兰到智利的第一次巡游将调查沿着梅纳德裂缝区域的太平洋 - 抗骨板运动的流动线，梅纳德裂缝区横穿东太平洋的纬度约50 s。将收集横纹测深，重力，磁性以及少量的地震反射分析，以确定断裂区域的确切痕迹及其与船舶和卫星雷达高度测定数据中相关的重力异常的关系。这些观察结果对于精确的板块重建至关重要，并且将在太平洋 - 北极边界的北端附近提供GPS-空的位置。这些数据将与板边界西南部的皮特曼断裂区的相似数据结合使用，以及梅纳德断裂带附近的先前巡航的磁异常，以改善高精度的板块重建，并评估太平洋和阿诺赛板的内部变形的限制。设定了运输计划后，将在接下来的几年中设计巡航科学计划。在更广泛的影响方面，我们计划教一名船上海洋物理学课，以两次巡游毕业和本科生。该课程由有关仪器和数据的每日课堂讲座组成；每天观看站立和数据处理几个小时；并由每个学生在一个独立的研究项目中工作。我们预计每个课程将容纳15名学生，其中包括主要是少数群体入学率的本科机构的参与者。