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| Main Authors: | , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2010
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| Online Access: | https://doi.org/10.1594/PANGAEA.733305 |
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| _version_ | 1867169022399741952 |
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| author | Köhler, Cornelia M Krijgsman, Wout van Hinsbergen, Douwe J J Heslop, David Dupont-Nivet, Guillaume |
| author_facet | Köhler, Cornelia M Krijgsman, Wout van Hinsbergen, Douwe J J Heslop, David Dupont-Nivet, Guillaume |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The upper Tortonian Metochia marls on the island of Gavdos provide an ideal geological archive to trace variations in Aegean sediment supply as well as changes in the North African monsoon system. A fuzzy-cluster analysis on the multiproxy geochemical and rock magnetic dataset of the astronomically tuned sedimentary succession shows a dramatic shift in the dominance of 'Aegean tectonic' clusters to 'North African climate' clusters. The tectonic signature, traced by the starvation of the Cretan sediment, now enables to date the late Tortonian basin foundering on Crete, related to the tectonic break-up of the Aegean landmass, at c. 8.2 Ma. The synchronous decrease in the North African climate proxies is interpreted to indicate a change in the depositional conditions of the sink rather than a climatic change in the African source. This illustrates that interpretations of climate proxies require a multiproxy approach which also assesses possible contributions of regional tectonism. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_733305 |
| institution | PANGAEA |
| language | en |
| publishDate | 2010 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Appendix A) Sedimentation rate, geochemical and environmental magnetic proxies of the samples of the Metochia section, on the island of Gavdos, south of Crete Köhler, Cornelia M Krijgsman, Wout van Hinsbergen, Douwe J J Heslop, David Dupont-Nivet, Guillaume Accumulation rate, mass; AGE; Aluminium; ARM, Intensity after demagnetization; Calcium; Calcium carbonate; Calculated, see reference(s); Center for Marine Environmental Sciences; Chromium; Gavdos; HAND; Hard isothermal remanent magnetization; Manganese/Aluminium ratio; MARUM; Metochia-section; Nickel; Sampling by hand; Sedimentation rate; see reference(s); Titanium/Aluminium ratio The upper Tortonian Metochia marls on the island of Gavdos provide an ideal geological archive to trace variations in Aegean sediment supply as well as changes in the North African monsoon system. A fuzzy-cluster analysis on the multiproxy geochemical and rock magnetic dataset of the astronomically tuned sedimentary succession shows a dramatic shift in the dominance of 'Aegean tectonic' clusters to 'North African climate' clusters. The tectonic signature, traced by the starvation of the Cretan sediment, now enables to date the late Tortonian basin foundering on Crete, related to the tectonic break-up of the Aegean landmass, at c. 8.2 Ma. The synchronous decrease in the North African climate proxies is interpreted to indicate a change in the depositional conditions of the sink rather than a climatic change in the African source. This illustrates that interpretations of climate proxies require a multiproxy approach which also assesses possible contributions of regional tectonism. |
| title | (Appendix A) Sedimentation rate, geochemical and environmental magnetic proxies of the samples of the Metochia section, on the island of Gavdos, south of Crete |
| topic | Accumulation rate, mass; AGE; Aluminium; ARM, Intensity after demagnetization; Calcium; Calcium carbonate; Calculated, see reference(s); Center for Marine Environmental Sciences; Chromium; Gavdos; HAND; Hard isothermal remanent magnetization; Manganese/Aluminium ratio; MARUM; Metochia-section; Nickel; Sampling by hand; Sedimentation rate; see reference(s); Titanium/Aluminium ratio |
| url | https://doi.org/10.1594/PANGAEA.733305 |