Major and rare earth element composition of ODP Site 191-1179 sediments, northwest Pacific
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2004
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| _version_ | 1867168560239869952 |
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| author | Fukukawa, M Takahashi, Y Hayasaka, Yasutaka Sakai, Yuhi Shimizu, Hiroshi |
| author_facet | Fukukawa, M Takahashi, Y Hayasaka, Yasutaka Sakai, Yuhi Shimizu, Hiroshi |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Depth profiles of major element and rare earth element (REE) abundances in sediment samples (mainly siliceous ooze and clay) recovered from Holes 1179B and 1179C at Site 1179, Ocean Drilling Program Leg 191 (41.4°N, 159.6°E) were determined. The oxidation states of Mn and Ce were determined by X-ray absorption near-edge structure. Some geochemical indicators were tested, including the MnO/TiO2 ratios, a bivariate diagram of La/Ce vs. Al2O3/(Al2O3+Fe2O3), and other discrimination diagrams. The oxidation state of Mn is reduced Mn(II) in the depth profile below 0.60 meters below seafloor (mbsf), which is consistent with relatively low and high abundances of Mn in the sediments and pore waters, respectively. It is possible that the diagenetic effect on the oxidation state and abundance of Mn makes it difficult for the MnO/TiO2 ratio to reflect the depositional environment. The normalized ratio of La and Ce does not change very much with depth, suggesting that the diagenetic effect does not affect the REE signature in the sediments. On the diagram of La/Ce vs. Al2O3/(Al2O3+Fe2O3), the sediments studied here plot at the boundary of the pelagic and continental margin fields. This suggests that continental material has contributed to the sediment to some degree, even though Site 1179 is in a pelagic region of the northwestern Pacific Ocean, >1600 km from Japan. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_779518 |
| institution | PANGAEA |
| language | en |
| publishDate | 2004 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Major and rare earth element composition of ODP Site 191-1179 sediments, northwest Pacific Fukukawa, M Takahashi, Y Hayasaka, Yasutaka Sakai, Yuhi Shimizu, Hiroshi 191-1179B; 191-1179C; DRILL; Drilling/drill rig; Joides Resolution; Leg191; North Pacific Ocean; Ocean Drilling Program; ODP Depth profiles of major element and rare earth element (REE) abundances in sediment samples (mainly siliceous ooze and clay) recovered from Holes 1179B and 1179C at Site 1179, Ocean Drilling Program Leg 191 (41.4°N, 159.6°E) were determined. The oxidation states of Mn and Ce were determined by X-ray absorption near-edge structure. Some geochemical indicators were tested, including the MnO/TiO2 ratios, a bivariate diagram of La/Ce vs. Al2O3/(Al2O3+Fe2O3), and other discrimination diagrams. The oxidation state of Mn is reduced Mn(II) in the depth profile below 0.60 meters below seafloor (mbsf), which is consistent with relatively low and high abundances of Mn in the sediments and pore waters, respectively. It is possible that the diagenetic effect on the oxidation state and abundance of Mn makes it difficult for the MnO/TiO2 ratio to reflect the depositional environment. The normalized ratio of La and Ce does not change very much with depth, suggesting that the diagenetic effect does not affect the REE signature in the sediments. On the diagram of La/Ce vs. Al2O3/(Al2O3+Fe2O3), the sediments studied here plot at the boundary of the pelagic and continental margin fields. This suggests that continental material has contributed to the sediment to some degree, even though Site 1179 is in a pelagic region of the northwestern Pacific Ocean, >1600 km from Japan. |
| title | Major and rare earth element composition of ODP Site 191-1179 sediments, northwest Pacific |
| topic | 191-1179B; 191-1179C; DRILL; Drilling/drill rig; Joides Resolution; Leg191; North Pacific Ocean; Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.779518 |