Timing of arrival of the Danube to the Black Sea: Provenance of sediments from DSDP Site 380/380A

de Leeuw, Arjan and Morton, Andrew C. and van Baak, Christian G. C. and Vincent, Stephen J. (2017) Timing of arrival of the Danube to the Black Sea: Provenance of sediments from DSDP Site 380/380A. Terra Nova. ISSN 0954-4879, ESSN: 1365-3121 DOI https://doi.org/10.1111/ter.12314

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Abstract

Estimates for the timing of the arrival of Danube sediment to the Black Sea range from Messinian to Pleistocene; the river is currently the largest sediment contributor, supplying 88 MT/yr. We identify two changes in siltstone provenance‐sensitive heavy mineral abundances at DSDP site 380/380A in the southwest Black Sea. Comparison with modern river sediment compositions indicates that siltstones above 571.5 mbsf (metres below sea floor) were supplied by the Danube, while sediments below 651.0 m were sourced by other supply systems. Palaeo‐magnetic, 40Ar/39Ar and biostratigraphic data reveal that the influx of Danube‐supplied sediment to the southwest Black Sea began between 4.36 ± 0.19 Ma and 1 Ma ago (Zanclean–Calabrian). Our results provide an independent time constraint on palaeogeographic reconstructions of the Pannonian and Dacian basins, which acted as upstream sediment sinks, and suggest that significant volumes of Danube‐supplied sediment only started to reach the Black Sea at least 1 Ma after the Messinian Salinity Crisis (5.971–5.33 Ma) had ended.

Item Type:	Article
Uncontrolled Keywords:	2017AREP; IA73
Subjects:	02 - Geodynamics, Geophysics and Tectonics
Divisions:	02 - Geodynamics, Geophysics and Tectonics
Journal or Publication Title:	Terra Nova
Identification Number:	https://doi.org/10.1111/ter.12314
Depositing User:	Sarah Humbert
Date Deposited:	01 Sep 2017 10:20
Last Modified:	10 Mar 2021 22:13
URI:	http://eprints.esc.cam.ac.uk/id/eprint/4048

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