Late Pleistocene sedimentation in the Western Mediterranean Sea
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| Autores principales: | , , , , , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
2003
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| _version_ | 1867171359169183744 |
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| author | Weldeab, Syee Siebel, Wolfgang Wehausen, Rolf Emeis, Kay-Christian Schmiedl, Gerhard Hemleben, Christoph |
| author_facet | Weldeab, Syee Siebel, Wolfgang Wehausen, Rolf Emeis, Kay-Christian Schmiedl, Gerhard Hemleben, Christoph |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Sediment cores from the Western Mediterranean Sea (WMS) have been analyzed for their bulk element composition, delta18O values of planktic foraminiferal tests, and 87Sr/86Sr and 143Nd/144Nd ratios of their bulk lithogenic components. The investigated time interval comprises the last 215 kyr. Si/Al and Ti/Al ratios as well as radiogenic isotope compositions indicate changes in the provenance of the lithogenic components between glacial intervals and interglacial phases. Comparison with modern data indicates that detrital input from the northwestern and northeastern Sahara may have dominated during interglacial phases. In contrast, during glacial periods the accumulation rate of terrigenous sediment is high and changes in the sediment source areas are evident that may be related to changes in the prevailing atmospheric circulation over the basin and its source areas. A productivity reconstruction based on bio-mediated barium accumulation rates reveals increased surface productivity during glacial phases. Intervals time-equivalent to sapropel formation in the Eastern Mediterranean Sea (EMS) show no changes in surface productivity compared to the intervening intervals. Comparison of the productivity patterns between the WMS and EMS suggests a decoupling during Late Pleistocene sapropel formation and highlights the importance of more localized factors such as the freshwater drainage basin. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_735757 |
| institution | PANGAEA |
| language | en |
| publishDate | 2003 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Late Pleistocene sedimentation in the Western Mediterranean Sea Weldeab, Syee Siebel, Wolfgang Wehausen, Rolf Emeis, Kay-Christian Schmiedl, Gerhard Hemleben, Christoph 87; Balearic Islands, western Mediterranean Sea; E Balearen; GeoTü; Gravity corer (Kiel type); KL_Mg; M40/4; M40/4_87-6SL; M40/4_KL66; M40/4_MC540E; M40/4_SL87; Meteor (1986); MUC; MultiCorer; Paleoceanography at Tübingen University; Piston corer Meischner large; SL Sediment cores from the Western Mediterranean Sea (WMS) have been analyzed for their bulk element composition, delta18O values of planktic foraminiferal tests, and 87Sr/86Sr and 143Nd/144Nd ratios of their bulk lithogenic components. The investigated time interval comprises the last 215 kyr. Si/Al and Ti/Al ratios as well as radiogenic isotope compositions indicate changes in the provenance of the lithogenic components between glacial intervals and interglacial phases. Comparison with modern data indicates that detrital input from the northwestern and northeastern Sahara may have dominated during interglacial phases. In contrast, during glacial periods the accumulation rate of terrigenous sediment is high and changes in the sediment source areas are evident that may be related to changes in the prevailing atmospheric circulation over the basin and its source areas. A productivity reconstruction based on bio-mediated barium accumulation rates reveals increased surface productivity during glacial phases. Intervals time-equivalent to sapropel formation in the Eastern Mediterranean Sea (EMS) show no changes in surface productivity compared to the intervening intervals. Comparison of the productivity patterns between the WMS and EMS suggests a decoupling during Late Pleistocene sapropel formation and highlights the importance of more localized factors such as the freshwater drainage basin. |
| title | Late Pleistocene sedimentation in the Western Mediterranean Sea |
| topic | 87; Balearic Islands, western Mediterranean Sea; E Balearen; GeoTü; Gravity corer (Kiel type); KL_Mg; M40/4; M40/4_87-6SL; M40/4_KL66; M40/4_MC540E; M40/4_SL87; Meteor (1986); MUC; MultiCorer; Paleoceanography at Tübingen University; Piston corer Meischner large; SL |
| url | https://doi.org/10.1594/PANGAEA.735757 |