Geochemical characteristics of Antarctic deep-sea ferromanganese nodules from highly oxic deep-sea water
1999-12 Six samples of ferromanganese nodules taken from a knoll and a seamount off Wilkes Land, Antarctica, have been analyzed by ICP-AES and their geochemical characteristics have been compared with those of Pacific nodules. The Antarctic nodules have slightly concentric structures with rough surf...
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Dept. of Earth and Planetary Sciences, Nagoya University
1999
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ftnagoyauniv:oai:nagoya.repo.nii.ac.jp:00001432 2024-06-09T07:40:38+00:00 Geochemical characteristics of Antarctic deep-sea ferromanganese nodules from highly oxic deep-sea water Ohta, Atsuyuki 3338 Naito, Koh 3339 Okuda, Yoshihisa 3340 Kawabe, Iwao 3341 1999-12 http://hdl.handle.net/2237/2843 eng eng Dept. of Earth and Planetary Sciences, Nagoya University The Journal of earth and planetary sciences, Nagoya University 46 1 13 http://hdl.handle.net/2237/2843 0919875X 1999 ftnagoyauniv 2024-05-15T13:20:51Z 1999-12 Six samples of ferromanganese nodules taken from a knoll and a seamount off Wilkes Land, Antarctica, have been analyzed by ICP-AES and their geochemical characteristics have been compared with those of Pacific nodules. The Antarctic nodules have slightly concentric structures with rough surface texture similar to those of early diagenetic Pacific ferromanganese nodules. However, mineralogy, transition metal contents (Mn, Fe, Ni and Cu) and the rare earth element (REE) patterns, suggest that the Antarctic nodules are more similar to hydrogenous Pacific ferromanganese nodules. The Antarctic nodules have higher values of positive Ce anomalies and Co/(Ni+Cu) ratios, but have lower Mn, P, Ni, Cu and V contents than hydrogenous type Pacific nodules. In addition, the Mn content correlates with the Co content in the Antarctic nodules. These features suggest that the Antarctic nodules contain hardly any diagenetic component. This is possibly related to the fact that all Antarctic samples were collected above the CCD. In the Antarctic Ocean, biogenic productivity is generally high, but most of the organic material is decomposed before it reaches the sediment because of the high oxygen content of the water column in the Antarctic Ocean. The Antarctic samples represent more hydrogenous materials even when compared with the hydrogenous nodules from the Pacific Ocean. 国立情報学研究所で電子化したコンテンツを使用している。 departmental bulletin paper Other/Unknown Material Antarc* Antarctic Antarctic Ocean Antarctica Wilkes Land Nagoya University: NAGOYA Repository Antarctic Antarctic Ocean Pacific The Antarctic Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) |
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Nagoya University: NAGOYA Repository |
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ftnagoyauniv |
language |
English |
description |
1999-12 Six samples of ferromanganese nodules taken from a knoll and a seamount off Wilkes Land, Antarctica, have been analyzed by ICP-AES and their geochemical characteristics have been compared with those of Pacific nodules. The Antarctic nodules have slightly concentric structures with rough surface texture similar to those of early diagenetic Pacific ferromanganese nodules. However, mineralogy, transition metal contents (Mn, Fe, Ni and Cu) and the rare earth element (REE) patterns, suggest that the Antarctic nodules are more similar to hydrogenous Pacific ferromanganese nodules. The Antarctic nodules have higher values of positive Ce anomalies and Co/(Ni+Cu) ratios, but have lower Mn, P, Ni, Cu and V contents than hydrogenous type Pacific nodules. In addition, the Mn content correlates with the Co content in the Antarctic nodules. These features suggest that the Antarctic nodules contain hardly any diagenetic component. This is possibly related to the fact that all Antarctic samples were collected above the CCD. In the Antarctic Ocean, biogenic productivity is generally high, but most of the organic material is decomposed before it reaches the sediment because of the high oxygen content of the water column in the Antarctic Ocean. The Antarctic samples represent more hydrogenous materials even when compared with the hydrogenous nodules from the Pacific Ocean. 国立情報学研究所で電子化したコンテンツを使用している。 departmental bulletin paper |
author |
Ohta, Atsuyuki 3338 Naito, Koh 3339 Okuda, Yoshihisa 3340 Kawabe, Iwao 3341 |
spellingShingle |
Ohta, Atsuyuki 3338 Naito, Koh 3339 Okuda, Yoshihisa 3340 Kawabe, Iwao 3341 Geochemical characteristics of Antarctic deep-sea ferromanganese nodules from highly oxic deep-sea water |
author_facet |
Ohta, Atsuyuki 3338 Naito, Koh 3339 Okuda, Yoshihisa 3340 Kawabe, Iwao 3341 |
author_sort |
Ohta, Atsuyuki |
title |
Geochemical characteristics of Antarctic deep-sea ferromanganese nodules from highly oxic deep-sea water |
title_short |
Geochemical characteristics of Antarctic deep-sea ferromanganese nodules from highly oxic deep-sea water |
title_full |
Geochemical characteristics of Antarctic deep-sea ferromanganese nodules from highly oxic deep-sea water |
title_fullStr |
Geochemical characteristics of Antarctic deep-sea ferromanganese nodules from highly oxic deep-sea water |
title_full_unstemmed |
Geochemical characteristics of Antarctic deep-sea ferromanganese nodules from highly oxic deep-sea water |
title_sort |
geochemical characteristics of antarctic deep-sea ferromanganese nodules from highly oxic deep-sea water |
publisher |
Dept. of Earth and Planetary Sciences, Nagoya University |
publishDate |
1999 |
url |
http://hdl.handle.net/2237/2843 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
Antarctic Antarctic Ocean Pacific The Antarctic Wilkes Land |
geographic_facet |
Antarctic Antarctic Ocean Pacific The Antarctic Wilkes Land |
genre |
Antarc* Antarctic Antarctic Ocean Antarctica Wilkes Land |
genre_facet |
Antarc* Antarctic Antarctic Ocean Antarctica Wilkes Land |
op_relation |
The Journal of earth and planetary sciences, Nagoya University 46 1 13 http://hdl.handle.net/2237/2843 0919875X |
_version_ |
1801383996240691200 |