| Classification of seamount morphology and its evaluating significance of ferromanganese crust in the central Pacific Ocean |
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| 作者姓名： | CHU Fengyou SUN Guosheng MA Weilin LI Shoujun QIAN Xinyan ZHAO Hongqiao |
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| 作者单位： | CHU Fengyou1，2*，SUN Guosheng1，3，MA Weilin1，2，LI Shoujun1，2，QIAN Xinyan1，2，ZHAO Hongqiao1，21. Laboratory of Submarine Geosciences of State Oceanic Administration，Hangzhou 310012，China 2. Second Institute of Oceanography，State Oceanic Administration，Hangzhou 310012，China3. Institute of Marine Mineral Resource，College of Geoscience，Jilin University，Changchun 130026，ChinaReceived 19 October 2005; accepted 3 January 2006 |
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| 基金项目： | Acknowledgements The paper is supported by the China 0cean Mineral Resources Research and Development Association under contract No. dyl05-01-1-1. Guo Shiqin, Liang Dehua, Xu Dongyu, Pan Jiahua, Cui Ruyong, Qin Yunshan and Chen Yuchuan provided the participants in this study with valuable advice. Liu Jingbiao,Zhang Kai, Jin Xiaobing, Gu Yumin and Li Yunda offered a lot of photograph. |
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| 摘 要： | 1 IntroductionCobalt-richcrust, alsoknownasferrom anganesecrustormanganesecrust, isdefined astheferroman-ganesedepositiondistributingontheseamountandoc-curringinlayer,crustandgravelornoduleinpart.Itisrich inthemetalofhigh economicvalue(cobalt,nick-el,plat…
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| 关 键 词： | 太平洋 海山 海洋资源 稀土 |
| 收稿时间： | 2005-10-19 |
| 修稿时间： | 2006-01-03 |
Classification of seamount morphology and its evaluating significance of ferromanganese crust in the central Pacific Ocean |
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| CHU Fengyou,SUN Guosheng,MA Weilin,LI Shoujun,QIAN Xinyan,ZHAO Hongqiao.Classification of seamount morphology and its evaluating significance of ferromanganese crust in the central Pacific Ocean[J].Acta Oceanologica Sinica,2006,25(2):63-70. |
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| Authors: | CHU Fengyou SUN Guosheng MA Weilin LI Shoujun QIAN Xinyan and ZHAO Hongqiao |
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| Affiliation: | 1.Laboratory of Submarine Geosciences of State Oceanic Administration, Hangzhou 310012, China;Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China2.Laboratory of Submarine Geosciences of State Oceanic Administration, Hangzhou 310012, China;Institute of Marine Mineral Resource, College of Geoscience, Jilin University, Changchun 130026, China |
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| Abstract: | Using the SeaBeam technology, the morphology of seamount and its relation to the formation of cobalt-rich crust in the central Pacific Ocean were surveyed during the cruise in 2003 for marine mineral resources. The result shows that seamounts can be divided morphologically into the spire seamount and the flat topped seamount. These two types of seamount bear great differences in their landform, lithology and cobalt-rich crust. On the upper portion of the flat topped seamount, the flat top and the sharp escarpments are unfavorable to the growth of crust, and, consequently, the crusts here are mostly laminar or gravelly, their thicknesses generally show great variations, and the consecutive ore body often develops in its deep water region. On the spire topped seamount, however, the flat area is small, and its gradient is constant without large variation from the top to the bottom. This favors the growth of cobalt-rich crust and often leads to consecutive tabular ore body of medium thickness, occurring on the spire topped seamount from the shallow water region to the deep water region. The cobalt-rich crust on the spire topped seamount is much better than that on the flat topped seamount for the crust abundance, crust coverage and number of ore-occurrences within unit area. Furthermore, the crust on the spire topped seamount is rich in cobalt, nickel, manganese elements of high economic value. Because the crust with high quality ore often occurs in the shallow water region on the spire topped seamount, it can be mined and use more easily in the future. |
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| Keywords: | central Pacific Ocean spire topped seamount flat topped seamount cobalt-rich crust evaluating significance |
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