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Scientific article
English

Lithology of the long sediment record recovered by the ICDP Dead Sea Deep Drilling Project (DSDDP)

Published inQuaternary science reviews, vol. 102, p. 149-165
Publication date2014
Abstract

The sedimentary sections that were deposited from the Holocene Dead Sea and its Pleistocene precursors are excellent archives of the climatic, environmental and seismic history of the Levant region. Yet, most of the previous work has been carried out on sequences of lacustrine sediments exposed at the margins of the present-day Dead Sea, which were deposited only when the lake surface level rose above these terraces (e.g. during the Last Glacial period) and typically are discontinuous due to major lake level variations in the past. Continuous sedimentation can only be expected in the deepest part of the basin and, therefore, a deep drilling has been accomplished in the northern basin of the Dead Sea during winter of 2010e2011 within the Dead Sea Deep Drilling Project (DSDDP) in the framework of the ICDP program. Approximately 720 m of sediment cores have been retrieved from two deep and several short boreholes. The longest profile (5017-1), revealed at awater depth of ~300m, reaches 455mbelow the lake floor (blf, i.e. to ~1175m below global mean sea level) and comprises approximately the last 220e240 ka. The record covers the upper part of the Amora (penultimate glacial), the Last Interglacial Samra, the Last Glacial Lisan and the Holocene Ze'elim Formations and, therewith, two entire glacialeinterglacial cycles. Thereby, for the first time, consecutive sediments deposited during theMIS 6/5, 5/4 and 2/1 transitions were recovered from the Dead Sea basin, which are not represented in sediments outcropping on the present-day lake shores. In this paper, wepresent essential lithological data including continuousmagnetic susceptibility and geochemical scanning data and the basic stratigraphy including first chronological data of the long profile (5017-1) from the deep basin. The results presented here (a) focus on the correlation of the deep basin deposits with main on-shore stratigraphic units, thus providing a unique comprehensive stratigraphic framework for regional paleoenvironmental reconstruction, and (b) highlight the outstanding potential of the Dead Sea deep sedimentary archive to record hydrological changes during interglacial, glacial and transitional intervals.

Keywords
  • Sediment facies
  • Laminated sediments
  • Hypersaline lakes
  • ICDP Dead Sea Deep Drilling Project
  • Levant paleoclimate
Funding
  • Swiss National Science Foundation - Projects 200021-132529 and 200020-149221/1.
  • Autre - ICDP
Citation (ISO format)
NEUGEBAUER, Ina et al. Lithology of the long sediment record recovered by the ICDP Dead Sea Deep Drilling Project (DSDDP). In: Quaternary science reviews, 2014, vol. 102, p. 149–165. doi: 10.1016/j.quascirev.2014.08.013
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ISSN of the journal0277-3791
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