A Study of the Io/Th (Th^230/Th^232) Chronology of Some Marine Sediments Using Solid-state Detectors
The exponential decrease in the ionium /thorium (Th^230/Th^232) ratios with depth indicates that the assumptions of the method are in conformity with nature. The utilization of both extraction and ion exchage techniques shows good agreement in the measured ionium/thorium (Th^230/Th^232) ratios but b...
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琉球大学理工学部
1969
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ftunivryukyus:oai:u-ryukyu.repo.nii.ac.jp:02006873 2023-05-15T15:06:14+02:00 A Study of the Io/Th (Th^230/Th^232) Chronology of Some Marine Sediments Using Solid-state Detectors Taira, Hatsuo 平良, 初男 1969-04 https://hdl.handle.net/20.500.12000/23247 eng eng 琉球大学理工学部 Science and Engineering Division, University of the Ryukyus http://hdl.handle.net/20.500.12000/23247 AN0025080X 琉球大学理工学部紀要. 理学編 Bulletin of Science & Engineering Division, University of Ryukyus. Mathematics & natural sciences 12 30 11 open access NA 1969 ftunivryukyus https://doi.org/20.500.12000/23247 2022-12-13T14:23:54Z The exponential decrease in the ionium /thorium (Th^230/Th^232) ratios with depth indicates that the assumptions of the method are in conformity with nature. The utilization of both extraction and ion exchage techniques shows good agreement in the measured ionium/thorium (Th^230/Th^232) ratios but better recovery of the thorium isotopes is obtained for the ion exchange technique.\nThe ionium/thorium (Th^230/Th^232) ratios depend upon geographical locations and on sedimentary materials in the ocean. The surface values of the ionium/tnorium (Th^230/Th^232) ratios are smaller for those areas receiving large amounts of land derived solid phase, and higher for carbonate materials.The rate of accumulation in the Mid-Pacific is 0.8mm/10^2 years and in the Arctic Ocean is 9.2mm/10^3 years on a gross basis. The deposits near coastal areas show a rapid accumulation rate due to the large amount of land-derived solid phase in these regions.\nThis paper is a part of a thesis submitted to the Department of Chemistry at the University of Hawaii on January, 1967. 紀要論文 http://purl.org/coar/resource_type/c_6501 Other/Unknown Material Arctic Arctic Ocean University of the Ryukyus Repository (UR) Arctic Arctic Ocean Pacific |
institution |
Open Polar |
collection |
University of the Ryukyus Repository (UR) |
op_collection_id |
ftunivryukyus |
language |
English |
description |
The exponential decrease in the ionium /thorium (Th^230/Th^232) ratios with depth indicates that the assumptions of the method are in conformity with nature. The utilization of both extraction and ion exchage techniques shows good agreement in the measured ionium/thorium (Th^230/Th^232) ratios but better recovery of the thorium isotopes is obtained for the ion exchange technique.\nThe ionium/thorium (Th^230/Th^232) ratios depend upon geographical locations and on sedimentary materials in the ocean. The surface values of the ionium/tnorium (Th^230/Th^232) ratios are smaller for those areas receiving large amounts of land derived solid phase, and higher for carbonate materials.The rate of accumulation in the Mid-Pacific is 0.8mm/10^2 years and in the Arctic Ocean is 9.2mm/10^3 years on a gross basis. The deposits near coastal areas show a rapid accumulation rate due to the large amount of land-derived solid phase in these regions.\nThis paper is a part of a thesis submitted to the Department of Chemistry at the University of Hawaii on January, 1967. 紀要論文 http://purl.org/coar/resource_type/c_6501 |
format |
Other/Unknown Material |
author |
Taira, Hatsuo 平良, 初男 |
spellingShingle |
Taira, Hatsuo 平良, 初男 A Study of the Io/Th (Th^230/Th^232) Chronology of Some Marine Sediments Using Solid-state Detectors |
author_facet |
Taira, Hatsuo 平良, 初男 |
author_sort |
Taira, Hatsuo |
title |
A Study of the Io/Th (Th^230/Th^232) Chronology of Some Marine Sediments Using Solid-state Detectors |
title_short |
A Study of the Io/Th (Th^230/Th^232) Chronology of Some Marine Sediments Using Solid-state Detectors |
title_full |
A Study of the Io/Th (Th^230/Th^232) Chronology of Some Marine Sediments Using Solid-state Detectors |
title_fullStr |
A Study of the Io/Th (Th^230/Th^232) Chronology of Some Marine Sediments Using Solid-state Detectors |
title_full_unstemmed |
A Study of the Io/Th (Th^230/Th^232) Chronology of Some Marine Sediments Using Solid-state Detectors |
title_sort |
study of the io/th (th^230/th^232) chronology of some marine sediments using solid-state detectors |
publisher |
琉球大学理工学部 |
publishDate |
1969 |
url |
https://hdl.handle.net/20.500.12000/23247 |
geographic |
Arctic Arctic Ocean Pacific |
geographic_facet |
Arctic Arctic Ocean Pacific |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_relation |
http://hdl.handle.net/20.500.12000/23247 AN0025080X 琉球大学理工学部紀要. 理学編 Bulletin of Science & Engineering Division, University of Ryukyus. Mathematics & natural sciences 12 30 11 |
op_rights |
open access |
op_doi |
https://doi.org/20.500.12000/23247 |
_version_ |
1766337875570327552 |