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Dead Sea Deep Drilling Project: The Swiss contribution (DSDDP-CH) - Phase II

Applicant Ariztegui Daniel
Number 149221
Funding scheme Project funding (Div. I-III)
Research institution Département des sciences de la Terre Université de Genève
Institution of higher education University of Geneva - GE
Main discipline Geology
Start/End 01.12.2013 - 28.02.2015
Approved amount 75'600.00
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Keywords (5)

lacustrine sediments; subsurface biosphere; evaporites; fluid inclusions; deep drilling

Lay Summary (French)

Lead
La mer Morte est le plus grand et le plus profond des bassins du Levant. Avec la montée du niveau des mers, la mer Méditerranée a pénétré dans le bassin, formant une lagune. Lorsque la lagune s’est séparée de la mer, une étendue lacustre s’est formée et a occupé le bassin. Le lac Lisan de la dernière glaciation et la mer Morte de l’Holocène ont été largement étudiés. On sait peu de choses de leurs prédécesseurs glaciaires et interglaciaires exposés de façon fragmentaire le long des rives.
Lay summary

Contenu et objectifs du travail de recherche

Ces lacunes dans l’histoire du bassin devraient être comblées grâce aux informations

sur les changements paléoenvironnementaux

fournies par les sondages extraites des zones centrales plus profondes du lac actuel. 

La mer Morte constitue un lac qualifié de « mort », parce que sa salinité est telle que les organismes aquatiques macroscopiques ne peuvent y vivre. Cependant, des micro-organismes adaptés à la très haute salinité sont présents. À l’aide de techniques particulières nous avons détecté une activité microbienne dans les 130 premiers mètres de sédiments de la carotte prélevée au centre du lac. Il reste à déterminer s’il s’agit de microbes encore vivants, ou d’une activité microbienne passée. Les intervalles interglaciaires riches en sels contiennent de petites inclusions fluides qui sont en cours d’étude. On espère ainsi reconstruire la température et d’autres paramètres physicochimiques ayant prévalu lors de la précipitation des cristaux de sel.


Contexte scientifique et social du projet de recherche

Notre travail générera des informations inédites et essentielles quant aux sources et risques du changement des niveaux de la mer Morte. Nos résultats permettront d’émettre des recommandations destinées aux monde politique, afin d’améliorer le monitoring environnemental et de protéger la population contre les risques environnementaux associés  aux variations de niveau de la Mer Morte.

 

Direct link to Lay Summary Last update: 26.09.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
Microbial sedimentary imprint on the deep Dead Sea sediment
Thomas Camille, Ebert Yael, Kiro Yael, Stein Mordechai, Ariztegui Daniel (2016), Microbial sedimentary imprint on the deep Dead Sea sediment, in The Depositional Record, 2(1), 118-138.
Scientific drilling projects in ancient lakes: Integrating geological and biological histories
Wilke Thomas, Wagner Bernd, Van Bocxlaer Bert, Albrecht Christian, Ariztegui Daniel, Delicado Diana, Francke Alexander, Harzhauser Mathias, Hauffe Torsten, Holtvoeth Jens, Just Janna, Leng Melanie J., Levkov Zlatko, Penkman Kirsty, Sadori Laura, Skinner Alister, Stelbrink Björn, Vogel Hendrik, Wesselingh Frank, Wonik Thomas (2016), Scientific drilling projects in ancient lakes: Integrating geological and biological histories, in Global and Planetary Change, 143, 118-151.
Dead Sea drawdown and monsoonal impacts in the Levant during the last interglacial
Torfstein A., Goldstein S.L., Kushnir Y., Enzel Y., Haug G., Stein M. (2015), Dead Sea drawdown and monsoonal impacts in the Levant during the last interglacial, in Earth and Planetary Science Letters, 412, 235-244.
Impact of paleoclimate on the distribution of microbial communities in the subsurface sediment of the Dead Sea
Thomas C., Ionescu D., Ariztegui D. (2015), Impact of paleoclimate on the distribution of microbial communities in the subsurface sediment of the Dead Sea, in Geobiology, 13(6), 546-561.
Present and future of subsurface biosphere studies in lacustrine sediments through scientific drilling
Ariztegui Daniel, Thomas Camille, Vuillemin Aurèle (2015), Present and future of subsurface biosphere studies in lacustrine sediments through scientific drilling, in International Journal of Earth Sciences, 104(6), 1655-1665.
Archaeal populations in two distinct sedimentary facies of the subsurface of the Dead Sea
Thomas C., Ionescu D., Ariztegui D. (2014), Archaeal populations in two distinct sedimentary facies of the subsurface of the Dead Sea, in MARINE GENOMICS, 17, 53-62.
Archaeal populations in two distinct sedimentary facies of the subsurface of the Dead Sea
Thomas C., Ionescu D., Ariztegui D. (2014), Archaeal populations in two distinct sedimentary facies of the subsurface of the Dead Sea, in Marine Genomics, 17, 53-62.
Influence of Methanogenic Populations in Holocene Lacustrine Sediments Revealed by Clone Libraries and Fatty Acid Biogeochemistry
Vuillemin A., Ariztegui D., Nobbe G., Schubert C. J. (2014), Influence of Methanogenic Populations in Holocene Lacustrine Sediments Revealed by Clone Libraries and Fatty Acid Biogeochemistry, in GEOMICROBIOLOGY JOURNAL, 31(4), 285-298.
Lithology of the long sediment record recovered by the ICDP Dead Sea Deep Drilling Project (DSDDP)
Neugebauer Ina, Brauer Achim, Schwab Markus J., Waldmann Nicolas D., Enzel Yehouda, Kitagawa Hiroyuki, Torfstein Adi, Frank Ute, Dulski Peter, Agnon Amotz, Ariztegui Daniel, Ben-Avraham Zvi, Goldstein Steven L., Stein Mordechai (2014), Lithology of the long sediment record recovered by the ICDP Dead Sea Deep Drilling Project (DSDDP), in Quaternary Science Reviews, 102, 149-165.
Lithology of the long sediment record recovered by the ICDP Dead Sea Deep Drilling Project (DSDDP)
Neugebauer Ina, Brauer Achim, Schwab Markus J., Waldmann Nicolas D., Enzel Yehouda, Kitagawa Hiroyuki, Torfstein Adi, Frank Ute, Dulski Peter, Agnon Amotz, Ariztegui Daniel, Ben-Avraham Zvi, Goldstein Steven L., Stein Mordechai (2014), Lithology of the long sediment record recovered by the ICDP Dead Sea Deep Drilling Project (DSDDP), in QUATERNARY SCIENCE REVIEWS, 102, 149-165.
Paleoenvironmental conditions define current sustainability of microbial populations in Laguna Potrok Aike sediments, Argentina
Vuillemin Aurele, Ariztegui Daniel, Luecke Andreas, Mayr Christoph (2014), Paleoenvironmental conditions define current sustainability of microbial populations in Laguna Potrok Aike sediments, Argentina, in AQUATIC SCIENCES, 76(1), 101-114.
Geomicrobiological investigations in subsaline maar lake sediments over the last 1500 years
Vuillemin Aurele, Ariztegui Daniel (2013), Geomicrobiological investigations in subsaline maar lake sediments over the last 1500 years, in QUATERNARY SCIENCE REVIEWS, 71, 119-130.
Origin and significance of diagenetic concretions in sediments of Laguna Potrok Aike, southern Argentina
Vuillemin A., Ariztegui D., De Coninck A. S., Lucke A., Mayr C., Schubert C. J. (2013), Origin and significance of diagenetic concretions in sediments of Laguna Potrok Aike, southern Argentina, in JOURNAL OF PALEOLIMNOLOGY, 50(3), 275-291.
Present and future of subsurface biosphere studies in lacustrine sediments through scientific drilling
Ariztegui Daniel, Thomas Camille, Vuillemin Aurèle, Present and future of subsurface biosphere studies in lacustrine sediments through scientific drilling, in International Journal of Earth Sciences.

Collaboration

Group / person Country
Types of collaboration
Dr. N. Waldmann Israel (Asia)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Prof. S L Goldstein/ Lamont-Doherty Earth Observatory United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Prof. A. Brauer/GFZ Potsdam Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Dr. Mordechai Stein/Geological Survey Israel (Asia)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Dr. V. Gardien/University Lyon-I France (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Geomicrobiology Group/ETHZ, Eawag Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Prof. T. Vennemann/Université de Lausanne Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
AGU Fall Meeting Poster Hypersaline subsurface microbial communities from the Dead Sea viewed from their metagenomes 15.12.2014 San Francisco, United States of America Ariztegui Daniel; Thomas Camille;
AGU Fall Meeting Poster Organic Proxy Disturbance in the Dead Sea Basin at the Beginning of the Holocene. 15.12.2014 San Francisco, United States of America Thomas Camille; Ariztegui Daniel;
12th Swiss Geoscience Meeting Poster Microbial Influence on Organic Proxy in the Dead Sea Sediment at the Beginning of the Holocene 21.11.2014 Fribourg, Switzerland Thomas Camille; Ariztegui Daniel;
International Congress of Sedimentology Talk given at a conference The Dead Sea subsurface biosphere: identifying specific microbial assemblages and their metabolic potential in an extreme environment. 18.08.2014 Geneva, Switzerland Thomas Camille; Ariztegui Daniel;


Communication with the public

Communication Title Media Place Year
Media relations: print media, online media La mer Morte racontée par ses fonds Pour la science vol. 423 International 2013

Associated projects

Number Title Start Funding scheme
119931 Potrok Aike Maar Lake Sediment Archive Drilling Project - The Swiss contribution (PASADO-CH) 01.04.2008 Project funding (Div. I-III)
188571 Origin And SIgnificance of Stromatolites of the Dead Sea (OASIS) 01.01.2020 Project funding (Div. I-III)
132529 Dead Sea Deep Drilling Project: The Swiss contribution (DSDDP-CH) - Science Section 01.12.2010 Project funding (Div. I-III)
153053 Climate history of the Indo-Pacific region and subsurface biosphere of Lake Towuti: The Swiss contribution to the ICDP Towuti Drilling Project (research part) 01.01.2015 Project funding (Div. I-III)
153054 Climate history of the Indo-Pacific region and subsurface biosphere of Lake Towuti: The Swiss contribution to the ICDP Towuti Drilling Project (drilling part) 01.06.2014 Research Infrastructure
132529 Dead Sea Deep Drilling Project: The Swiss contribution (DSDDP-CH) - Science Section 01.12.2010 Project funding (Div. I-III)

Abstract

The present Dead Sea is located in the lowest continental elevation on Earth that has been intermittently filled by several water bodies during the Neogene-Quaternary periods. Thus, the sedimentary fill of the Dead Sea Basin (DSB) comprises an archive of the limnological-hydrological-seismic histories of the region, which have been modulated by global climate and rift transform fault tectonics. An international team of scientists is cooperating in the Dead Sea Deep Drilling Project (DSDDP) within the framework of an International Continental Scientific Drilling Program (ICDP) initiative. The combination of the data obtained from the exposed (onshore) sedimentary sections and the cores is providing high-resolution paleo-climatic and paleo- seismic records of the DSB for at least the last ca. 200 ka BP. The existing seismic information will be amalgamated with that of basin development and rift tectonics, and these new paleohydrological and paleoclimate datasets will be integrated and evaluated in the framework of global climate modeling.The retrieved cores are the result of several decades of extensive study in the DBS. The activity of the various research groups involved in this ICDP project has led to the development of new geochemical approaches, absolute dating methods, lake level reconstruction, paleomagnetism and cosmogenic isotope studies, as well as pioneering paleoseismic investigations. Within the framework of this project these scientific groups are leading the research on the sediment cores using their excellent analytical facilities. Additionally, the DSB has been a major route of human migration and development, and the modern Dead Sea has enormous economic importance. Thus, the proposed research is providing an important contribution to the understanding of the environmental conditions that accompanied human development during the middle to late Quaternary and will help shaping the future of the DSB. The Swiss research contribution to this international project is centered in investigating the living microbial communities within the sediments to characterize the subsurface biosphere in such a unique extreme environment. It emphasizes integrated studies of microbiology, geochemistry (interstitial waters), and mineral authigenesis/diagenesis. It combines a novel approach in lacustrine systems analyzing the 16S rRNA gene and other functional genes as well as fluid inclusions in the evaporite intervals.This proposal follows on previous SNF-funded ICDP projects and is part of the long-term Swiss scientific efforts to reconstruct Quaternary climates using continental records. It seeks resources to cover the salary and laboratory costs of a PhD student thesis centered on investigations of the subsurface biosphere in this extreme environment.
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