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| Main Authors: | , , |
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| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
2002
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| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.713295 |
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| _version_ | 1867171357368778752 |
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| author | Plank, Terry Balzer, Vaughn Carr, Michael J |
| author_facet | Plank, Terry Balzer, Vaughn Carr, Michael J |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | A major oceanographic event preserved in the Cocos plate sedimentary column survived subduction and is recorded in the changing composition of Nicaraguan magmas. A uranium increase in these magmas since the latest Miocene (after 7 Ma) resulted from the 'carbonate crash' at 10 Ma and the ensuing high organic carbon burial in the sediments. The response of the arc to this paleoceanographic event requires near steady-state sediment recycling at this margin since 20 Ma. This relative stability in sediment subduction invites one of the first attempts to balance sedimentary input and arc output across a subduction zone. Calculations based on Th indicate that as much as 75% of the sedimentary column was subducted beneath the arc. The Nicaraguan margin is one of the few places to observe such strong links between the oceans and the solid earth. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_713295 |
| institution | PANGAEA |
| language | en |
| publishDate | 2002 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Chemical composition of ODP Leg 138 sediments Plank, Terry Balzer, Vaughn Carr, Michael J 138-844B; 138-845A; DRILL; Drilling/drill rig; Joides Resolution; Leg138; North Pacific Ocean; Ocean Drilling Program; ODP A major oceanographic event preserved in the Cocos plate sedimentary column survived subduction and is recorded in the changing composition of Nicaraguan magmas. A uranium increase in these magmas since the latest Miocene (after 7 Ma) resulted from the 'carbonate crash' at 10 Ma and the ensuing high organic carbon burial in the sediments. The response of the arc to this paleoceanographic event requires near steady-state sediment recycling at this margin since 20 Ma. This relative stability in sediment subduction invites one of the first attempts to balance sedimentary input and arc output across a subduction zone. Calculations based on Th indicate that as much as 75% of the sedimentary column was subducted beneath the arc. The Nicaraguan margin is one of the few places to observe such strong links between the oceans and the solid earth. |
| title | Chemical composition of ODP Leg 138 sediments |
| topic | 138-844B; 138-845A; DRILL; Drilling/drill rig; Joides Resolution; Leg138; North Pacific Ocean; Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.713295 |