Arctic Gravity and Bathymetric Data Acquisition Over the Arctic Mid-Ocean Ridge and the Lomonosov Ridge

北极大洋中脊和罗蒙诺索夫海脊的北极重力和测深数据采集

• 批准号: 9623170
• 负责人: Bernard Coakley
• 金额: $ 5.45万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-05-15 至 1997-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9623170&HistoricalAwards=false
• 关键词: Arctic; Gravity; Bathymetric; Data; Acquisition

Abstract 9623170 Coakley Funds are requested to cover the costs of gravity and bathymetry data acquisition in the Arctic Ocean for a study of the Arctic Mid Ocean Ridge (AMOR) and the adjacent sliver of continental crust, the Lomonosov Ridge. In concert with the physical oceanographic program, we would like to collect additional long bathymetric and gravity anomaly profiles across the combined Lomonosov Ridge and AMOR. This data, combined with the collected on previous submarine science cruises, will permit the construction of regional scale maps across much of the basin within the operational area. The advance of plate tectonics into the Arctic Ocean basin has reached only to the Lomonosov Ridge. The Arctic Mid Ocean Ridge is the northern extension of the Mid Atlantic Ridge. It is perhaps the slowest spreading ridge on earth. Propagation of the AMOR into the Arctic Ocean separated the Lomonosov Ridge from the northern edge of Eurasia beginning at about 58Ma. This separation has continued up until the present time. Maps produced during this study will be used to define transverse structures in the ridge (the geometry of half graben bounding faults and transfer zones) and the morphology of the AMOR. The regional lines will also be useful for studies of isostatic compensation of both the Lomonosov Ridge and the AMOR as well as defining he transition from the Lomonosov Ridge to the adjacent enigmatic Alpha-Mendeleev Ridge.

摘要 9623170 科克利基金被请求支付在北冰洋采集重力和测深数据的费用，以研究北冰洋中海脊 (AMOR) 和邻近的大陆地壳碎片罗蒙诺索夫海脊。 与物理海洋学计划相配合，我们希望收集罗蒙诺索夫海岭和 AMOR 合并后的额外长测深和重力异常剖面。 这些数据与之前的潜艇科学巡航收集到的数据相结合，将有助于绘制作业区域内大部分盆地的区域比例尺地图。 板块构造向北冰洋盆地的推进仅到达了罗蒙诺索夫海岭。 北冰洋中洋海脊是大西洋中海脊的向北延伸。 它可能是地球上扩张最慢的山脊。 AMOR从大约58Ma开始传播到北冰洋，将罗蒙诺索夫海岭与欧亚大陆北缘分开。 这种分离一直持续到现在。 本研究期间制作的地图将用于定义山脊的横向结构（半地堑边界断层和转换区的几何形状）和 AMOR 的形态。 区域线也将有助于研究罗蒙诺索夫海岭和 AMOR 的均衡补偿，以及定义从罗蒙诺索夫海岭到邻近神秘的阿尔法-门捷列夫海岭的过渡。