Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
2023
|
| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.960335 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1867171038757912576 |
|---|---|
| author | Tsunogai, Shizuo Nakanishi, Keita Yamada, Masatoshi |
| author_facet | Tsunogai, Shizuo Nakanishi, Keita Yamada, Masatoshi |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The nodules used in this study were collected from two cruises in the western North Pacific by box coring (KH-79-4) and dredging (GH-78-1). After being dried at 110°C each sample extracted from the top, side and bottom of the nodule at various penetration levels were radiochemically analyzed for their Thorium isotopes contents by digesting about 100mg of a nodule sample without application of the successive separation treatment. Thorium in the solution was purified with an anion exchange resin and chemical separation techniques, and electrodeposited onto a silver disc from a hydrochloric acid and ethanol solution. The alpha activities of 228Th, 230Th and 232Th were counted with a spectrometer equipped with a surface barrier silicon detector. The chemical yield was determined by counting the 0 activity of 234Th added before the analysis. The yield ranged from 80 to 95%. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_960335 |
| institution | PANGAEA |
| language | en |
| publishDate | 2023 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Concentration of Th isotopes for manganese nodules at various levels of their external manganese rich layers Tsunogai, Shizuo Nakanishi, Keita Yamada, Masatoshi Alpha spectrometry; BC; Box corer; Deposit type; DEPTH, sediment/rock; Distance; Distance, maximum; Distance, minimum; ELEVATION; Event label; Geochemistry; GH78-1; GH78-1-FG73-1; Grab; GRAB; growth; Hakuho-Maru; Hakurei-Maru (1974); Identification; KH-79-4; KH-79-4-22; LATITUDE; LONGITUDE; manganese micronodule; manganese nodule; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Pacific Ocean; Sample type; Sediment; Station 1036; Station 22; Thorium-228; Thorium-228, standard deviation; Thorium-230; Thorium-230, standard deviation; Thorium-232; Thorium-232, standard deviation The nodules used in this study were collected from two cruises in the western North Pacific by box coring (KH-79-4) and dredging (GH-78-1). After being dried at 110°C each sample extracted from the top, side and bottom of the nodule at various penetration levels were radiochemically analyzed for their Thorium isotopes contents by digesting about 100mg of a nodule sample without application of the successive separation treatment. Thorium in the solution was purified with an anion exchange resin and chemical separation techniques, and electrodeposited onto a silver disc from a hydrochloric acid and ethanol solution. The alpha activities of 228Th, 230Th and 232Th were counted with a spectrometer equipped with a surface barrier silicon detector. The chemical yield was determined by counting the 0 activity of 234Th added before the analysis. The yield ranged from 80 to 95%. |
| title | Concentration of Th isotopes for manganese nodules at various levels of their external manganese rich layers |
| topic | Alpha spectrometry; BC; Box corer; Deposit type; DEPTH, sediment/rock; Distance; Distance, maximum; Distance, minimum; ELEVATION; Event label; Geochemistry; GH78-1; GH78-1-FG73-1; Grab; GRAB; growth; Hakuho-Maru; Hakurei-Maru (1974); Identification; KH-79-4; KH-79-4-22; LATITUDE; LONGITUDE; manganese micronodule; manganese nodule; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Pacific Ocean; Sample type; Sediment; Station 1036; Station 22; Thorium-228; Thorium-228, standard deviation; Thorium-230; Thorium-230, standard deviation; Thorium-232; Thorium-232, standard deviation |
| url | https://doi.org/10.1594/PANGAEA.960335 |