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From Satellites to Molecules (SAM): Strategies and tools for reconstructing Late Pleistocene climate in northeastern Patagonia

English title From Satellites to Molecules (SAM): Strategies and tools for reconstructing Late Pleistocene climate in northeastern Patagonia
Applicant Ariztegui Daniel
Number 155927
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 01.04.2015 - 31.03.2019
Approved amount 328'293.00
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All Disciplines (3)

Discipline
Geology
Geochemistry
Geochronology

Keywords (5)

Lakes; Stromatolites; Late Pleistocene; Paleoclimate; Patagonia

Lay Summary (French)

Lead
La question sur le fait que le climat de l'Amérique du Sud aurait varié en phase et dans la même direction que le climat dans l'hémisphère Nord durant la déglaciation et l'Holocène est toujours ouverte et a besoin d'être approfondie. Pour établir la synchronicité ou son absence parmi les données paléoclimatiques disponibles il est necessaire de développer une bonne chronologie et surtout une compréhension complète des signaux des changements climatiques. Une solide comprehension des ces signaux, ainsi que leur transfert de la source à l'archive sédimentaire est crucial pour une bonne interprétation dans les séquences continentales du passe.
Lay summary

Contenue et objectifs du travail de recherche

Les stromatolites sont des structures sédimentaires organiques laminés construits par le piégeage et la fixation et / ou la précipitation des minéraux par des procédés microbiens. En raison de la variété des milieux naturels où ils se produisent, leur attribution à des conditions environnementales particulières a sa formation n'est pas toujours simple. Ce projet aborde des questions clés, relatives à la compréhension du climat mondial actuel et passé, en analysant les enregistrements sédimentaires terrestres du bassin de Carri Laufquen (41 ° S) situé dans l'avant-pays de la Patagonie du nord (Argentine). Ce bassin fermé contenant des stromatolites vivants et fossiles qui offrent une occasion unique de comprendre les facteurs environnementaux contrôlant leur formation ainsi que de développer une meilleure chronologie de la déglaciation.

Contexte scientifique et social du projet de recherche

Pour atteindre ces objectifs, nous allons combiner une approche géomorphologique, hydrologique et géomicrobiologique pour:
- Générer une reconstruction à haute résolution des variations du niveau du lac en quantifiant la variation des volumes d'eau à Laguna Carri Laufquen au cours de la fin du Pléistocène-Holocène.
- Déterminer les conditions environnementales dans la formation des stromatolites modernes  en suivant (in situ) les paramètres physico-chimiques et hydrologiques  à une échelle local et du bassin.
- Mener des experiences en laboratoire dans des conditions contrôlées.

Ces résultats aideront à mieux comprendre la formation des stromatolites et de développer des nouveaux proxies pour des reconstitutions paléoenvironnementales plus précises.

 

 

Direct link to Lay Summary Last update: 12.02.2015

Responsible applicant and co-applicants

Employees

Name Institute

Collaboration

Group / person Country
Types of collaboration
Prof. Stefano Bernasconi/ETH-Zürich Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure
Prof. Gabriela CUSMINSKY/Universidad Nacional del Comahue Argentina (South America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Dr. Andrés BILMES/UNLP-CONICET Argentina (South America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Prof. Timothy Eglington/ETH-Zürich Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure
Dr. Maria del Pilar ALVAREZ/CONICET-UNLP Argentina (South America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Prof. Trinidad de Torres Perez Hidalgo/Universidad Politecnica de Madrid Spain (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Prof. Jan PAWLOWSKI/Université de Genève Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Dr. Muriel PACTON/Université Lyon I France (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Prof. Bastiaan IBELINGS/Université de Genève 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
Swissed Poster Growth morphologies and plausible stressors ruling the formation of Late Pleistocene lacustrine carbonate buildups in the Maquinchao Basin (Argentina) 23.02.2019 Fribourg, Switzerland Ariztegui Daniel; EYMARD Inès; Vasconcelos Crisogono;
International Association of Sedimentologists Summer School Talk given at a conference Stromatolites, ooids and other biomineralization products 22.10.2018 Zapala, Argentina Ariztegui Daniel;
Invited talk Individual talk Intracellular Amorphous Carbonate Inclusions (micropearls) in unicellular eukaryotes: A previously unknown type of non-skeletal biomineralization 13.02.2018 GFZ, Potsdam, Germany Ariztegui Daniel;
IAS Regional Meeting Talk given at a conference Tubular microporosity in fossil fluviatile microbialites of the Maquinchao Basin (Argentina) 09.10.2017 Toulouse, France EYMARD Inès; Vasconcelos Crisogono; Ariztegui Daniel;
VII Congreso Latinoamericano de Sedimentología Talk given at a conference Stromatolites from the Maquinchao Basin in Northeastern Patagonia (Argentina): Key deposits to reconstruct the evolution of the Carri Laufquen lacustrine system. 20.09.2017 Santa Rosa, Argentina Ariztegui Daniel; Vasconcelos Crisogono; EYMARD Inès;
Goldschmidt Conference Poster Unraveling Fossil and Living Microbialite Formation in the Maquinchao Basin (Argentina) 14.08.2017 Paris, France Ariztegui Daniel; Vasconcelos Crisogono; EYMARD Inès;
20th International Sedimentological Congress Talk given at a conference Fossil and living freshwater microbialites in Northeastern Patagonia (Argentina) 14.08.2017 Quebec City, Canada Vasconcelos Crisogono; EYMARD Inès; Ariztegui Daniel;
V Jornadas de las Ciencias de la Tierra Dr. Eduardo Musacchio Poster MODELADO DIGITAL DE AFLORAMIENTOS EN 3D USANDO LA TÉCNICA “STRUCTURE FROM MOTION”: APLICACIONES A PROBLEMAS SEDIMENTOLÓGICOS Y TECTOESTRATIGRÁFICOS 08.06.2017 Comodoro Rivadavia, Argentina Ariztegui Daniel; EYMARD Inès;
Swiss Geoscience Meeting Poster Stromatolites growth in a freshwater environment from Northeastern Patagonia (Argentina) 18.11.2016 Geneva, Switzerland Vasconcelos Crisogono; EYMARD Inès; Ariztegui Daniel;
SPP Day Talk given at a conference Quaternary microbial construction in the Maquinchao Basin, northeastern Patagonia (Argentina) 28.10.2016 Lausanne, Switzerland EYMARD Inès; Vasconcelos Crisogono; Ariztegui Daniel;
Swissed 2016 Talk given at a conference Quaternary microbial construction in the Maquinchao Basin, northeastern Patagonia (Argentina) 27.02.2016 Fribourg, Switzerland EYMARD Inès; Ariztegui Daniel; Vasconcelos Crisogono;


Knowledge transfer events

Active participation

Title Type of contribution Date Place Persons involved
20 International Sedimentological Congress Poster 13.08.2018 Quebec City, Canada Ariztegui Daniel;


Communication with the public

Communication Title Media Place Year
Talks/events/exhibitions Des bactéries recyclent la biomasse des archées pour survivre dans les sédiments profonds de la Mer International 2018

Awards

Title Year
Creation of the "Daniel Ariztegui Grant Program" for graduate students and early career scientists from South America in the framework of the Microbialites: formation, evolution, diagenesis (M-fed 2021) meeting (https://www.microbialites.com/meeting-2021/daniel-ariztegui-grant-program/) 2021
Premio Promocion de la Geomorfologia y Geologia del Cuaternario en Argentina 2018

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)
191614 ClimatiZENs - Climats du passé pour citoyens de demain 01.01.2021 Agora
163048 Using New Geochemical and Nanotechnological Approaches to Study Biomineralization in Microbialites III 01.01.2016 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)
100668 Environmental Change Down South (ENDS): The climate record of Lago Fagnano, Tierra del Fuego 01.03.2004 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)
169911 Swiss membership in the International Scientific Continental Drilling Program ICDP 01.01.2017 Research Infrastructure

Abstract

Whether southern South American climate varied in phase and in the same direction as climate in the Northern Hemisphere during deglaciation and Holocene times is still a contentious issue and one that needs further exploration. There are currently three different hypothesis about the onset of climate change associated with deglaciation: 1) Changes in the water balance of the North Atlantic, the source region for much of the global thermohaline circulation, serve to propagate the deglacial signal worldwide; 2) Changes in the Southern Ocean, as recorded in some ice cores, lead deglaciation as seen in Greenland ice; and 3) Synchronicity in the timing of high-latitude climate change in both hemispheres as well as with some tropical records is suggestive of tropical forcing as a key initiator of deglaciation. It may seem surprising that this controversy has not already been settled. The most important confound for establishing synchronicity or its absence among the available paleoclimate records revolves around chronology development and often a fully comprehension of the recorded signals of climate change. Crucial to the accurate interpretation of proxies in continental sequences is a robust understanding of these signals, as well as the timescales associated with their transfer from biological source to the sedimentary archive. Stromatolites are commonly defined as laminated organo sedimentary structures built by the trapping and binding and/or precipitation of minerals via microbial processes. Due to the variety of natural environments where they occur, their ascription to particular environmental conditions of formation is not always straightforward. The emphasis of this proposal is to address key questions concerning the understanding of modern and past global climate, by analyzing terrestrial sedimentary records of the Carri Laufquen Basin (41°S) located in the northeastern Patagonia foreland. This closed-basin contains living and fossil stromatolites offering a unique opportunity to understand the environmental factors controlling their formation as well as to develop a better chronology for the deglaciation, respectively. To achieve these goals we will combine a geomorphological, hydrological and geomicrobiological approach to: - Generate a high-resolution reconstruction of lake level changes by quantifying the variation of water volumes in Laguna Carri Laufquen during the Late Pleistocene-Holocene.- Determine the natural environmental conditions were present day stromatolites are growing by monitoring (in situ) physicochemical and hydrological parameters from a local- to a basin-scale.- Carry out experimental investigations in the laboratory under controlled conditions, from a nanometric- to a mm-scale. These results will help to better understand the biogeochemistry ruling stromatolites formation and to develop new proxies for paleoenvironmental reconstructionsThe outcome of these investigations will allow firstly to identify and quantify lake level changes, and secondly to distinguish plausible causes behind these changes. Blending these results will provide a robust and convincing reconstruction of climate change in an area of the world with a clear paucity of well constrained paleoclimatic records. Furthermore, the direct comparison between several sites using similar approaches and methodology will provide a unique opportunity to address regional paleoclimatic issues. Only a detailed comparison among records combined with an inner understanding of the local systems will provide the integrated overview of environmental changes necessary to either validate or reject the different scenarios proposed by current climatic models. This is a critical issue in any attempt to develop predictive patterns of climate change of major societal interest.
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