Nd isotope as the tracer of seawater evolution of early Miocene in the eastern Pacific Ocean
Fifty-six samples of nannofossil ooze were collected from Core PC5794 in the northern equatorial Pacific at 5 em intervals. With the methods of mass spectrometer (VG354) and ICP, the Nd isotopic compositions (epsilon(Nd)(t)), Mn contents and Mg/Sr ratios of carbonate phase have been analyzed. CaCO3...
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/3780 2024-09-15T17:46:28+00:00 Nd isotope as the tracer of seawater evolution of early Miocene in the eastern Pacific Ocean Liu, JH Chen, LR Wang, YX Han, JX 2003-06-01 http://ir.qdio.ac.cn/handle/337002/3781 https://doi.org/10.1360/01we0016 英语 eng CHINESE SCIENCE BULLETIN Liu, JH; Chen, LR; Wang, YX; Han, JX.Nd isotope as the tracer of seawater evolution of early Miocene in the eastern Pacific Ocean,CHINESE SCIENCE BULLETIN,2003,48():106-110 http://ir.qdio.ac.cn/handle/337002/3781 doi:10.1360/01we0016 Nd Isotope Seawater Evolution Eastern Pacific Ocean Multidisciplinary Sciences Article 期刊论文 2003 ftchinacasciocas https://doi.org/10.1360/01we0016 2024-08-09T03:18:11Z Fifty-six samples of nannofossil ooze were collected from Core PC5794 in the northern equatorial Pacific at 5 em intervals. With the methods of mass spectrometer (VG354) and ICP, the Nd isotopic compositions (epsilon(Nd)(t)), Mn contents and Mg/Sr ratios of carbonate phase have been analyzed. CaCO3 contents of bulk sediments were obtained by dissolution of 0.5 mol/L HCl. Based on these data, the high-resolution epsilon(Nd)(t) profile of seawater in early Miocene with core depth(or time) have been established. The values of epsilon(Nd)(t) range from -6.2 to -2.97 and 4 fluctuation cycles existed during 24.06-22.02 Ma. 4 low epsilon(Nd)(t) values (about -6.4) correspond to high CaCO3 contents, which implicates that there were 4 cold epochs or 4 times of Antarctic Bottom Water activity. They occurred at the time of 24.06 Ma, 23.85 Ma, 22.88 Ma and 22.26 Ma, respectively. High epsilon(Nd)(t) values correspond to the high Mn contents and high values of Mg/Sr ratio, which indicates the existence of 4 intense hydrothermal activity periods during 24.06-22 Ma, the durations of them are 4.05-23.98 Ma, 23.69-23.15 Ma, 22.74-22.37 Ma and 22.06-22.02 Ma, respectively. Fifty-six samples of nannofossil ooze were collected from Core PC5794 in the northern equatorial Pacific at 5 em intervals. With the methods of mass spectrometer (VG354) and ICP, the Nd isotopic compositions (epsilon(Nd)(t)), Mn contents and Mg/Sr ratios of carbonate phase have been analyzed. CaCO3 contents of bulk sediments were obtained by dissolution of 0.5 mol/L HCl. Based on these data, the high-resolution epsilon(Nd)(t) profile of seawater in early Miocene with core depth(or time) have been established. The values of epsilon(Nd)(t) range from -6.2 to -2.97 and 4 fluctuation cycles existed during 24.06-22.02 Ma. 4 low epsilon(Nd)(t) values (about -6.4) correspond to high CaCO3 contents, which implicates that there were 4 cold epochs or 4 times of Antarctic Bottom Water activity. They occurred at the time of 24.06 Ma, 23.85 Ma, 22.88 Ma and 22.26 Ma, ... Article in Journal/Newspaper Antarc* Antarctic Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
Nd Isotope Seawater Evolution Eastern Pacific Ocean Multidisciplinary Sciences |
spellingShingle |
Nd Isotope Seawater Evolution Eastern Pacific Ocean Multidisciplinary Sciences Liu, JH Chen, LR Wang, YX Han, JX Nd isotope as the tracer of seawater evolution of early Miocene in the eastern Pacific Ocean |
topic_facet |
Nd Isotope Seawater Evolution Eastern Pacific Ocean Multidisciplinary Sciences |
description |
Fifty-six samples of nannofossil ooze were collected from Core PC5794 in the northern equatorial Pacific at 5 em intervals. With the methods of mass spectrometer (VG354) and ICP, the Nd isotopic compositions (epsilon(Nd)(t)), Mn contents and Mg/Sr ratios of carbonate phase have been analyzed. CaCO3 contents of bulk sediments were obtained by dissolution of 0.5 mol/L HCl. Based on these data, the high-resolution epsilon(Nd)(t) profile of seawater in early Miocene with core depth(or time) have been established. The values of epsilon(Nd)(t) range from -6.2 to -2.97 and 4 fluctuation cycles existed during 24.06-22.02 Ma. 4 low epsilon(Nd)(t) values (about -6.4) correspond to high CaCO3 contents, which implicates that there were 4 cold epochs or 4 times of Antarctic Bottom Water activity. They occurred at the time of 24.06 Ma, 23.85 Ma, 22.88 Ma and 22.26 Ma, respectively. High epsilon(Nd)(t) values correspond to the high Mn contents and high values of Mg/Sr ratio, which indicates the existence of 4 intense hydrothermal activity periods during 24.06-22 Ma, the durations of them are 4.05-23.98 Ma, 23.69-23.15 Ma, 22.74-22.37 Ma and 22.06-22.02 Ma, respectively. Fifty-six samples of nannofossil ooze were collected from Core PC5794 in the northern equatorial Pacific at 5 em intervals. With the methods of mass spectrometer (VG354) and ICP, the Nd isotopic compositions (epsilon(Nd)(t)), Mn contents and Mg/Sr ratios of carbonate phase have been analyzed. CaCO3 contents of bulk sediments were obtained by dissolution of 0.5 mol/L HCl. Based on these data, the high-resolution epsilon(Nd)(t) profile of seawater in early Miocene with core depth(or time) have been established. The values of epsilon(Nd)(t) range from -6.2 to -2.97 and 4 fluctuation cycles existed during 24.06-22.02 Ma. 4 low epsilon(Nd)(t) values (about -6.4) correspond to high CaCO3 contents, which implicates that there were 4 cold epochs or 4 times of Antarctic Bottom Water activity. They occurred at the time of 24.06 Ma, 23.85 Ma, 22.88 Ma and 22.26 Ma, ... |
format |
Article in Journal/Newspaper |
author |
Liu, JH Chen, LR Wang, YX Han, JX |
author_facet |
Liu, JH Chen, LR Wang, YX Han, JX |
author_sort |
Liu, JH |
title |
Nd isotope as the tracer of seawater evolution of early Miocene in the eastern Pacific Ocean |
title_short |
Nd isotope as the tracer of seawater evolution of early Miocene in the eastern Pacific Ocean |
title_full |
Nd isotope as the tracer of seawater evolution of early Miocene in the eastern Pacific Ocean |
title_fullStr |
Nd isotope as the tracer of seawater evolution of early Miocene in the eastern Pacific Ocean |
title_full_unstemmed |
Nd isotope as the tracer of seawater evolution of early Miocene in the eastern Pacific Ocean |
title_sort |
nd isotope as the tracer of seawater evolution of early miocene in the eastern pacific ocean |
publishDate |
2003 |
url |
http://ir.qdio.ac.cn/handle/337002/3781 https://doi.org/10.1360/01we0016 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
CHINESE SCIENCE BULLETIN Liu, JH; Chen, LR; Wang, YX; Han, JX.Nd isotope as the tracer of seawater evolution of early Miocene in the eastern Pacific Ocean,CHINESE SCIENCE BULLETIN,2003,48():106-110 http://ir.qdio.ac.cn/handle/337002/3781 doi:10.1360/01we0016 |
op_doi |
https://doi.org/10.1360/01we0016 |
_version_ |
1810494617681920000 |