The Lomonosov ridge experiment: “Lorex 79”
The Lomonosov ridge experiment: “Lorex 79”
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罗蒙诺索夫山脊实验：“Lorex 79”
DOI：
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
J. Weber
中科院分区：
文献类型：
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作者：
J. Weber
1979年春，能源、矿产和资源部（EMR）进行了一项大规模的多学科项目，研究罗蒙诺索夫海脊的性质和起源。该科学计划由地球物理处规划和协调，极地大陆架项目提供后勤支持。来自EMR其他部门、渔业和海洋部（DFO）以及加拿大和美国多所大学的科学家参加了代号为Lorex 79的项目。
In the spring of 1979 the Department of Energy, Mines and Resources (EMR) undertook a large-scale, multidisciplinary project to study the nature and origin of the Lomonosov Ridge. The scientific program was planned and coordinated by the Earth Physics Branch, and the logistic support was provided by the Polar Continental Shelf Project/Scientists from other branches of EMR, from the Department of Fisheries and Oceans (DFO), and from a number of universities in Canada and the U.S.A. took part in the project code named Lorex 79.
The Lomonosov Ridge is an aseismic submarine mountain range that bisects the Arctic Ocean into the Amerasia and Eurasia Basins (Figure 1). It rises sharply to a height of some 3 km above the adjacent abyssal plains, the Makarov Basin to the west, and the Fram Basin to the east. It is close to 200 km wide where it approaches the North American and Eurasian continental shelves but narrows to 25 km at its midpoint near the North Pole. Its relatively flat top, the steepness of its flanks, and results from previous geophysical measurements indicate that it may be a sedimentary structure of continental origin rather than a structure of oceanic origin [Sweeney et al., 1978]. In this context it has been suggested on several occasions that it is a rafted fragment split off the Eurasian continental shelf at the time of the opening of the North Atlantic and the Eurasia Basin in Early Tertiary times. However, since the available geophysical, geological, and bathymetric data are relatively sparse and often of doubtful quality (because of the enormously difficult operating conditions), the continental nature of the Lomonosov Ridge has never been unambiguously demonstrated.