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Köhler, Cornelia M; Krijgsman, Wout; van Hinsbergen, Douwe J J; Heslop, David; Dupont-Nivet, Guillaume (2010): (Appendix A) Sedimentation rate, geochemical and environmental magnetic proxies of the samples of the Metochia section, on the island of Gavdos, south of Crete. PANGAEA,, Supplement to: Köhler, CM et al. (2010): Concurrent tectonic and climatic changes recorded in upper Tortonian sediments from the Eastern Mediterranean. Terra Nova, 22(1), 52-63,

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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.
Related to:
Köhler, Cornelia M; Heslop, David; Dekkers, Mark J; Krijgsman, Wout; van Hinsbergen, Douwe J J; von Dobeneck, Tilo (2008): Tracking provenance change during the late Miocene in the eastern Mediterranean using geochemical and environmental magnetic parameters. Geochemistry, Geophysics, Geosystems, 9(12), Q12018,
Latitude: 34.850000 * Longitude: 24.090000
Metochia-section * Latitude: 34.850000 * Longitude: 24.090000 * Location: Gavdos * Method/Device: Sampling by hand (HAND)
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1AGEAgeka BPGeocode
2Sedimentation rateSRcm/kaKöhler, Cornelia M
3CalciumCa2+mg/kgKöhler, Cornelia M
4Calcium carbonateCaCO3%Köhler, Cornelia M
5AluminiumAlmg/kgKöhler, Cornelia M
6Accumulation rate, massMARg/cm2/kaKöhler, Cornelia MAl-mass accumulation rate
7NickelNimg/kgKöhler, Cornelia M
8Accumulation rate, massMARg/cm2/kaKöhler, Cornelia MNi-mass accumulation rate
9ChromiumCrmg/kgKöhler, Cornelia M
10Accumulation rate, massMARg/cm2/kaKöhler, Cornelia MCr-mass accumulation rate
11Manganese/Aluminium ratioMn/AlKöhler, Cornelia M
12Titanium/Aluminium ratioTi/AlKöhler, Cornelia M
13Hard isothermal remanent magnetizationHIRMmA/mKöhler, Cornelia MCalculated, see reference(s)HIRM cfb
14ARM, Intensity after demagnetizationARMmA/mKöhler, Cornelia Msee reference(s)ARM cfb
2702 data points

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