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通过对中西太平洋海山形态剖面的山体高度、山顶直径、基底直径、山顶直径与基底直径之比、山体坡度、山体高度与基底直径比值六个参数多元统计分析,发现可以根据山体高度与基底直径的比值对海山形态类型进行分类:比值小于0.10的为平顶海山(Ⅰ类),大于0.10的为尖顶海山(Ⅱ类),对于等于0.10的海山需参考平坦度和山体坡度,平坦度大和山体坡度缓的为Ⅰ类,反之为Ⅱ类。西太平洋的麦哲伦海山区、马绍尔群岛基本以平顶海山为主,介于中西太平洋之间的威克—马尔库斯海山区和中太平洋海山区、莱恩群岛平顶海山与尖顶海山共同发育。对各种类型海山上钴结壳分布研究发现,无论是在尖顶海山还是在平顶海山,板状结壳均比较发育,但砾状结壳在平顶海山比在尖顶海山的发育。中太平洋尖顶海山的结壳比平顶海山的发育,但由于山顶面积小,钴结壳资源量不大。仅从平顶海山看,在麦哲伦海山区、威克—马尔库斯海山区板状结壳比中太平洋海山区、马绍尔群岛、莱恩群岛的板状结壳发育,前者的板状结壳平均厚度大于3 cm,后者的板状结壳平均厚度小于3 cm,总体上是西太平洋平顶海山钴结壳比中太平洋平顶海山的发育。两种类型海山各方向上的资源分布明显不同,在平顶海山的西部山坡的资源比东部山坡的丰富,尖顶海山的则刚好相反。
Based on the multivariate statistical analysis of the six parameters of mountain height, top diameter, base diameter, top-to-bottom diameter ratio, mountain slope, mountain height and base diameter ratio in the seamount cross-section of the Western and Central Pacific Ocean, we found that according to the height of the mountain and base diameter Ratio of seamount types: the ratio of less than 0.10 for the Pingdingshan (Ⅰ), more than 0.10 for the peak seamounts (Ⅱ), seamounts equal to 0.10 need to refer to the flatness and slope of the mountain, flatness and slope of the mountain Slow for the Ⅰ class, on the contrary as Ⅱ class. The Magellan Mountains in the western Pacific Ocean, the Marshall Islands are basically flat-topped seamounts, between the Wick-Marcuse and Mid-Pacific seaboards in the western and western Pacific, and the Ping’en seamounts and the Peak Seamounts in the Lay Islands are developed together. The study on the distribution of cobalt crusts on various types of seamounts found that the plate crusts were well developed in both the top seamounts and the Pingdingshan, but the development of gravel crusts was more in the Pingdingshan than in the top seamounts. The crust of the Central Pacific Spire seamounts is more developed than that of Pingdingshan, but due to the small peak area, the amount of cobalt crusts is not large. Only from Pingdingshan, in the Magellan Mountains, the Wick-Marcuse plateau crust is more developed than that in the Central Pacific, the Marshall Islands and the Ryan Islands. The mean plate-like crustal thickness Which is larger than 3 cm. The average thickness of plate-shaped crusts in the latter is less than 3 cm. Generally, it is the development of the Pingdingshan cobalt crust in the western Pacific Ocean than that of the Pingdingshan in the central Pacific Ocean. The distribution of resources in each of the two types of seamounts is obviously different. The resources of the western slopes in Pingdingshan are more abundant than those in the eastern slopes and the peaks in the seamounts.