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Establishing stable IRON isotopes of laminated LAKE sediments as novel palaeoclimate proxy (IRONLAKE)

English title Establishing stable IRON isotopes of laminated LAKE sediments as novel palaeoclimate proxy (IRONLAKE)
Applicant Ariztegui Daniel
Number 166308
Funding scheme Project funding (Div. I-III)
Research institution Section des Sciences de la Terre et de l'environnement Université de Genève
Institution of higher education University of Geneva - GE
Main discipline Geology
Start/End 01.12.2016 - 30.11.2018
Approved amount 243'614.00
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All Disciplines (2)

Discipline
Geology
Geochemistry

Keywords (8)

Sedimentology; Limnogeology; Redox conditions; Fe isotopes; micro-stratigraphy; Paleoclimate; Lake Fagnano; diagenesis

Lay Summary (French)

Lead
Pour comprendre les changements climatiques induits par l'homme, il est essentiel de mieux comprendre la variabilité naturelle du climat dans le passé. Une couverture géographique globale plus ample que celle dont nous disposons actuellement et des « proxies » ou indicateurs paléoclimatiques de haute résolution temporelle sont nécessaires impérativement pour améliorer les projections climatiques et planifier des stratégies d'adaptation au changement climatique et au stress environnemental.
Lay summary

Contenu et objectifs du travail de recherche

Notre principal objectif est de contribuer à une meilleure compréhension de la variabilité naturelle du climat. Les sédiments lacustres laminés fournissent des informations paléoclimatiques précieuses. Ce projet vise à développer la mesure des isotopes stables du fer dans des sédiments lacustres laminés et parallèlement de développer un nouveau proxy pour reconstruire des changements de la température et du vent dans le passé. Le projet sera réalisé sur du matériel sédimentaire du lac Fagnano (Terre du Feu, Argentine) déjà échantillonné. Ses sédiments  se caractérisent par des laminations riches en fer donc très appropriés pour appliquer cette méthode.

 

Contexte scientifique et social du projet de recherche

Notre travail générera des informations inédites et essentielles sur la variabilité naturelle du climat.  La perspective interdisciplinaire de ce projet est conçu pour faire avancer le domaine innovateur des isotopes de fer et de fournir un nouveau proxy vent / température qui pourra être utile dans des autres reconstructions paléoclimatiques ainsi que  pour la modélisation climatique.

 

Direct link to Lay Summary Last update: 11.08.2016

Responsible applicant and co-applicants

Employees

Publications

Publication
Weak Influence of Paleoenvironmental Conditions on the Subsurface Biosphere of Lake Ohrid over the Last 515 ka
Thomas Camille, Francke Alexander, Vogel Hendrik, Wagner Bernd, Ariztegui Daniel (2020), Weak Influence of Paleoenvironmental Conditions on the Subsurface Biosphere of Lake Ohrid over the Last 515 ka, in Microorganisms, 8(11), 1736-1736.
Banded Iron Travertines at the Ilia Hot Spring (Greece): An interplay of biotic and abiotic factors leading to a modern Banded Iron Formation analog?
Kanellopoulos Christos, Thomas Camille, Xirokostas Nikolaos, Ariztegui Daniel (2018), Banded Iron Travertines at the Ilia Hot Spring (Greece): An interplay of biotic and abiotic factors leading to a modern Banded Iron Formation analog?, in The Depositional Record, 1-23.
Cyclic preservation of Fe/Mn-redox fronts in sediments of an oligotrophic, ventilated deep-water lake (Lago Fagnano, Tierra del Fuego)
NeugebauerIna, ThomasCamille, WaldmannNicolas D, RecasensCristina, ArizteguiDaniel (2018), Cyclic preservation of Fe/Mn-redox fronts in sediments of an oligotrophic, ventilated deep-water lake (Lago Fagnano, Tierra del Fuego), in EarthArXiv, 1-41.
Fluid inclusions from the deep Dead Sea sediment provide new insights on Holocene extreme microbial life.
ThomasCamille, ArizteguiDaniel (2018), Fluid inclusions from the deep Dead Sea sediment provide new insights on Holocene extreme microbial life., in EarthArXiv.
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Bacterial recycling of archaeal biomass as a new strategy for extreme life in Dead Sea deep sediments
Thomas Camille, Grossi Vincent, Antheaume Ingrid, Ariztegui Daniel, Bacterial recycling of archaeal biomass as a new strategy for extreme life in Dead Sea deep sediments, in EarthArXiv.

Collaboration

Group / person Country
Types of collaboration
Dr. Sabine Wulf/U. of Heidelberg Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Prof. Flavio S. Anselmetti/UNIBE Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Prof. Achim Brauer/GFZ Germany (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
Argentinean Congress of Geomorphology and Quaternary Geology Talk given at a conference Earth, Wind and Fire: The main components of South American Climate 19.09.2018 Puerto Madryn, Argentina Ariztegui Daniel; Thomas Camille;
International Sedimentology Congress Talk given at a conference The investigation of microbial communities from lake sediments and their relevance in paleoclimatic studies 13.08.2018 Quebec, Canada Ariztegui Daniel; Thomas Camille;
International Sedimentology Congress Poster Bacteria Recycle Archaeal Biomass to Survive in the Deep Dead Sea Sediments 13.08.2018 Quebec, Canada Ariztegui Daniel; Thomas Camille;
IPA-IAL Joint Meeting Talk given at a conference Cyclic burial of pale-oxidation fronts in sediments from Lago Fagnano, Tierra del Fuego, potentially triggered by oscillations of the Southern Westerlies 18.06.2018 Stockholm, Sweden Thomas Camille; Ariztegui Daniel;
EUG Annual Conference Poster Preservation and climatic forcing of non-annual Fe-Mn sediment laminae in Lago Fagnano, Tierra del Fuego 09.04.2018 Vienna, Austria Thomas Camille; Ariztegui Daniel;
EUG Annual Conference Talk given at a conference Integrating microbial community analysis in lacustrine sediments to paleoclimatic studies 08.04.2018 Vienna, Austria Thomas Camille; Ariztegui Daniel;
EUG Annual Conference Talk given at a conference Bacterial Recycling of Archaeal Biomass in the Deep Hypersaline Sediment of the Dead Sea 08.04.2018 Vienna, Austria Ariztegui Daniel; Thomas Camille;
IAS Regional meeting Talk given at a conference The Dead Sea subsurface biosphere as analog of microbial activity in salt giant deposits 16.10.2017 Toulouse, France Ariztegui Daniel; Thomas Camille;
IAS Regional Meeting Talk given at a conference Biotic and abiotic processes involved in the formation of banded iron travertine 16.10.2017 Toulouse, France Thomas Camille; Ariztegui Daniel;


Awards

Title Year
Best Poster for an Early Career Researcher - International Sedimentology Congress, Quebec (Canada) 2018
Distinguished Scientist - Argentinean Association of Geomorphology and Quaternary Geology. Puerto Madryn, Argentina 2018
Poster to early career scientist - IAS Regional Sedimentology Meeting, Toulouse (France) 2017

Associated projects

Number Title Start Funding scheme
191614 ClimatiZENs - Climats du passé pour citoyens de demain 01.01.2021 Agora
162810 Paleoecological indicators in lake sediments based on a multidisciplinary approach of endospore-forming Firmicutes and the chemical and isotopic composition of sediments and organic matter 01.12.2015 Interdisciplinary projects
119931 Potrok Aike Maar Lake Sediment Archive Drilling Project - The Swiss contribution (PASADO-CH) 01.04.2008 Project funding (Div. I-III)
50862 The Patagonia Lake Transect (PaLaTra): Reconstructing Late Quaternary Paleoenvironmental Changes in the Southern Hemisphere 01.01.1998 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)

Abstract

Under the pressure of human-induced climate change, it is essential to better understand the past natural climate variability. A broader global coverage of high-resolution palaeoclimatic proxy (indicator) data is urgently needed to improve climate projections and adaptation strategies to changing climate and environmental stress. Laminated lake sediments provide valuable palaeoclimatic information. This project aims to develop the innovative methodology of stable iron isotope measurements of laminated lake sediments as a novel proxy for past changes in temperature and wind and/or dominant diagenetic paths. Only recently, first studies have hinted that variations in stable iron isotopes of marine and lake sediments reflect changing redox conditions in oceans and lakes, possibly linked to variations in past wind and/or temperature. This project aims to test the hypothesis of a redox-climate-relationship mirrored in iron isotopes. The project will be carried out on existing sediment cores from Lago Fagnano (Tierra del Fuego, Argentina) exhibiting characteristic iron-rich laminae that are most suitable for the approach. In a multidisciplinary perspective, a combination of ultrahigh-resolution micro-facies analysis by thin section microscopy and micro-X-ray-fluorescence elemental scanning will be applied to fullyunderstand the general sedimentological and geochemical processes and, specifically, possible seasonal/climatic variations influencing the formation and deposition of iron-bearing minerals in the lake. Additionally, specific microbial communities will be investigated to constrain the effects of syngenetic and diagenetic processes on iron isotopes.The gained knowledge will then be linked with mineral-selective iron isotope measurements to infer the sensitivity of stable iron isotopes to capture climatic variations. The interdisciplinary perspective of this project is designed to advance the innovative field of iron isotope geochemistry and its application to paleoclimate reconstruction.
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