| Ni Jianyu,Zhou Huaiyang,Pan Jianming,Zhao Hongqiao,Hu Chuanyu,Wang Fangguo. 2001. Geochemical characteristics of sediments from the COMRA registered pioneer area (CRPA), equatorial northeastern Pacific Ocean. Acta Oceanologica Sinica, (4):553－561 |
| Geochemical characteristics of sediments from the COMRA registered pioneer area (CRPA), equatorial northeastern Pacific Ocean |
| Geochemical characteristics of sediments from the COMRA registered pioneer area (CRPA), equatorial northeastern Pacific Ocean |
| Received:May 21, 2001 Revised:July 10, 2001 |
| DOI： |
| Key words:Sedimentary geochemistry multimetallic nodules equatorial Pacific Ocean |
| 中文关键词: Sedimentary geochemistry multimetallic nodules equatorial Pacific Ocean |
| 基金项目:This project was supported by the China Ocean Mineral Resources Exploration and Development Special Foundation under contract No.Dy95-06-03. |
| Author Name | Affiliation | | Ni Jianyu | Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
Key Laboratory of Submarine Geosciences of State Oceanic Administration, Hangzhou 310012, China | | Zhou Huaiyang | Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
Key Laboratory of Submarine Geosciences of State Oceanic Administration, Hangzhou 310012, China | | Pan Jianming | Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
Key Laboratory of Submarine Geosciences of State Oceanic Administration, Hangzhou 310012, China | | Zhao Hongqiao | Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | | Hu Chuanyu | Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | | Wang Fangguo | 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 brown layer (Unit B) in the lower part. Color division between them can be explained as a hiatus. As a result, 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. |
| 中文摘要: |
| 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 brown layer (Unit B) in the lower part. Color division between them can be explained as a hiatus. As a result, 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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