| Geochemical characteristics of sediments from the COMRA registered pioneer area (CRPA), equatorial northeastern Pacific Ocean |
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| 作者姓名： | Ni Jianyu Zhou Huaiyang Pan Jianming Zhao Hongqiao Hu Chuanyu Wang Fangguo |
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| 作者单位： | Received May 21，2001; accepted July，l0. 200l |
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| 基金项目： | This project was supported by the China Ocean Mineral Resources Exploration and Development Special Foundation un-
der contract |
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| 摘 要： | I\TRODUcrIO\Most substances that enter the oceans are ultimately kept as sediments. ffefore settingdOwn, they experienced vdrious complex biological and chebocal cycles and interactions, whichinvolve sorne substances more than others. The interactlons continue after deposition. Sedl-ments do not lie passive]y on the sea--floor until they are buried: deeP--sea animals disturb thesediments as they forage fOr fdri, and some sediments may experience erosion and resuspensionby bottom currents. …
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| 关 键 词： | Sedimentary geochemistry multimetallic nodules equatorial Pacific Ocean |
| 收稿时间： | 2001/5/21 0:00:00 |
| 修稿时间： | 2001/7/10 0:00:00 |
Geochemical characteristics of sediments from the COMRA registered pioneer area (CRPA), equatorial northeastern Pacific Ocean |
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| Ni Jianyu,Zhou Huaiyang,Pan Jianming,Zhao Hongqiao,Hu Chuanyu,Wang Fangguo.Geochemical characteristics of sediments from the COMRA registered pioneer area (CRPA), equatorial northeastern Pacific Ocean[J].Acta Oceanologica Sinica,2001,20(4):553-561. |
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| Authors: | Ni Jianyu Zhou Huaiyang Pan Jianming Zhao Hongqiao Hu Chuanyu and Wang Fangguo |
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| Institution: | 1.Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;Key Laboratory of Submarine Geosciences of State Oceanic Administration, Hangzhou 310012, China2.Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China |
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| Abstract: | COMRA(China Ocean Mineral Resources Association) registered pioneer area (CRPA) is located in the western part of the area between the Clarion and Clipperton Fraction Zones (CCFZs). Based on distinctive color and bio-disturbing properties, two layers are recognized in the sediment columns from the CRPA: a pale brown layer (Unit A) on the top and a dark for layer (Unit B) in the lower part. Color division between them can be explained as a hiatus. As a resu1t, the two units are different to each other in chemical composition and sediment properties. It is found that contents of P2O5, MnO2, CaO, Na2O in sediments of older Unit B are higher, but SiO2 content is slightly lower. Based on correlation analysis, Mn and Fe in the sediments have different origins. The former is mainly precipitated in authigenic process, whilst the latter is closely related to terrigenous detritus. Therefore, the differences in chemical composition of the sediments are caused by different sedimentation settings. |
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| Keywords: | Sedimentary geochemistry multimetallic nodules equatorial Pacific Ocean |
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