Project

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QuantiCarb@Spring - processes and quantification of CaCO3 fabric-specific layering at hot springs and its environmental implications

Applicant De Boever Eva
Number 154810
Funding scheme Ambizione
Research institution Sciences de la Terre Département des Géosciences Université de Fribourg
Institution of higher education University of Fribourg - FR
Main discipline Geology
Start/End 01.07.2015 - 30.11.2018
Approved amount 526'934.00
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Keywords (4)

microfabric; CaCO3 rate law; precipitation experiment; travertine layering

Lay Summary (French)

Lead
Titre: QuantiCarb@Spring - processes and quantification of CaCO3 fabric-specific layering athot springs and its environmental implications
Lay summary

Les dépôts carbonatés laminés de sources hydrothermales peuvent constituer, de part leur rapide taux de sédimentation, un enregistrement précis des changements environnementaux en milieu continental (température, humidité, vitesse d’écoulement, …). Malgré les observations détaillées, issues d’études pétrographiques et géochimiques, la quantification des paramètres liés aux changements environnementaux ainsi que la compréhension de leurs impacts sur la précipitation et les ‘CaCO3 fabrics’ sont peu étudiés. De plus, l’impact de la diagenèse précoce sur les textures et les signatures géochimiques est peu compris et sous-estimé. Sa compréhension est cruciale pour éviter une interprétation erronée des textures laminées et de leurs signatures géochimiques dans des dépôts anciens.

Ce projet se propose de déterminer et de quantifier les effets des paramètres environnementaux sur la précipitation et l’altération des dépôts carbonatés laminés  (échelle infra-micrométrique  à métrique) dans 3 différents milieux de dépôt des sources hydrothermales en milieu continental. En combinant des observations de systèmes hydrothermales carbonatés de référence, en Hongrie et en Grèce, ce projet permettra de:

  1. Examiner les textures et les compositions géochimiques-isotopiques des travertins réparti en trois environnements clés suivant une approche multi-échelle (infra-µm à m) afin d’en déduire les mécanismes et les processus de contrôle.
  2. Quantifier à partir d’analyses de laboratoires les paramètres déterminant les processus physico-chimiques et microbiologiques de précipitation des carbonates.
  3. Actualiser les lois qui régissent la précipitation des carbonates (CaCO3) en conditions hydrothermales en prenant en compte les interactions physico-chimiques et mircobiologiques.
Direct link to Lay Summary Last update: 09.08.2016

Responsible applicant and co-applicants

Employees

Publications

Publication
An Analytical Algorithm of Porosity–Permeability for Porous and Fractured Media: Extension to Reactive Transport Conditions and Fitting via Flow-Through Experiments Within Limestone and Dolomite
Erol Selçuk, Fowler Sarah Jane, Nehler Mathias, De Boever Eva, Harcouët-Menou Virginie, Laenen Ben (2019), An Analytical Algorithm of Porosity–Permeability for Porous and Fractured Media: Extension to Reactive Transport Conditions and Fitting via Flow-Through Experiments Within Limestone and Dolomite, in Transport in Porous Media, 1-41.
Comparative study of the Pleistocene Cakmak quarry (Denizli Basin, Turkey) and modern Mammoth Hot Springs deposits (Yellowstone National Park, USA)
De Boever Eva, Foubert Anneleen, Lopez Benjamin, Swennen Rudy, Özkul Mehmet, Virgone Aurélien (2017), Comparative study of the Pleistocene Cakmak quarry (Denizli Basin, Turkey) and modern Mammoth Hot Springs deposits (Yellowstone National Park, USA), in Quaternary International, 437, 129-146.
Assessing the impact of diagenesis on foraminiferal geochemistry from a low latitude, shallow-water drift deposit
StainbankStephanie, Assessing the impact of diagenesis on foraminiferal geochemistry from a low latitude, shallow-water drift deposit, in Earth and Planetary Science Letters, 545.

Collaboration

Group / person Country
Types of collaboration
Geological Survey of Greece (I.G.M.E.) Greece (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Université de Lausanne - SwissSIMS Switzerland (Europe)
- Research Infrastructure
Institute for Geological and Geochemical Research Hungary (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure
KU Leuven, Geology Division, group of Prof. S. Fowler Belgium (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
University of Geneva Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Institute for Genomic Biology, University of Illinois at Urbana-Champaign United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
University of Bristol, School of Earth Science Great Britain and Northern Ireland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
University of Bern Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
IAS Meeting Poster The fate of travertine fabrics – Case study of early diagenesis in the Y-10 core (Mammoth Hot Springs, Yellowstone, USA) 09.10.2017 Toulouse, France De Boever Eva;
Micro-CT User Meeting Talk given at a conference Insights in the spatial and temporal heterogeneity of biofilm lithification. 12.06.2017 Brussels, Belgium De Boever Eva;
Lyell Meeting 2017: Sticking Together: microbes and their role in forming sediments Talk given at a conference Insights in the spatial and temporal heterogeneity of microbial and early diagenetic lithification 07.03.2017 London, Great Britain and Northern Ireland De Boever Eva;
14th Swiss Geosciences Meeting Poster Combined μ-CT - NMR approach to (micro)porosity quantification in continental spring carbonates 18.11.2016 Geneva, Switzerland De Boever Eva;
14th Swiss Geosciences Meeting Poster Multi-scale 3D-visualization of microbial carbonates: Insights from field and lab experiments 18.11.2016 Geneva, Switzerland De Boever Eva;
Dolomieu Conference on Carbonate Platforms and Dolomite Talk given at a conference Multi-scale approach to (micro) porosity quantification in Pleistocene continental spring carbonate facies from Cakmak quarry (Denizli, Turkey) 04.10.2016 Selva di Val Gardena, Italy De Boever Eva;
26th Goldschmidt Conference Talk given at a conference Controls on CaCO3 precipitation and diagenesis in terrestrial hot springs 26.06.2016 Yokohama, Japan De Boever Eva;
Bruker micro-CT User Meeting Talk given at a conference Multi-scale 3D-visualization of microbial carbonates: Insights from field and lab experiments 09.05.2016 Luxembourg, Luxembourg De Boever Eva;
SwissSed Poster An experimental lab set-up to address mechanisms and controls of CaCO3 precipitation at continental hot springs 27.02.2016 Fribourg, Switzerland De Boever Eva;
First International Carbonate Mound Conference Talk given at a conference An experimental lab set-up to address mechanisms and controls of CaCO3 precipitation at continental hot springs 01.11.2015 Locarno, Switzerland De Boever Eva;


Self-organised

Title Date Place
25th Meeting of Swiss Sedimentologists: Bridging Gaps and Generations in Swiss Sedimentology 25.02.2017 Fribourg, Switzerland
Twenty-fourth Meeting of Swiss Sedimentologists (SwissSed) 27.02.2016 Fribourg, Switzerland
First International Carbonate Mound Conference 01.11.2015 Locarno, Switzerland

Knowledge transfer events

Active participation

Title Type of contribution Date Place Persons involved
Women in Natural Sciences (WINS) - Workshop Diving in the Deep Blue Ocean Performances, exhibitions (e.g. for education institutions) 14.03.2016 Fribourg, Switzerland De Boever Eva;


Communication with the public

Communication Title Media Place Year
Talks/events/exhibitions Journée portes ouvertes UniFR - Explora (Interactive Geology stand) Rhaeto-Romanic Switzerland German-speaking Switzerland 2018

Awards

Title Year
Early Career Scientist Poster Award at the International Sedimentological Congress (ISC) at Québec, CA. Endowment: IAS Special Publication of choice 2018

Associated projects

Number Title Start Funding scheme
150731 Laboratory multi-scale nano-CT scanner for 3D visualization and 4D experimentation in Earth and Material Sciences 01.05.2014 R'EQUIP
164032 CLUMPING LAUSANNE: A REQUEST FOR A REGIONAL FACILITY TO MEASURE CLUMPING IN CARBONATES 01.01.2016 R'EQUIP
149247 4D-DIAGENESIS@MOUND: Understanding the temporal and spatial variability of early diagenesis in carbonate mounds 01.01.2014 Project funding
169911 Swiss membership in the International Scientific Continental Drilling Program ICDP 01.01.2017 Research Infrastructure

Abstract

Carbonate (hot) spring deposits could be sensitive records of terrestrial environmental changes due to their very fast CaCO3 precipitation rates. Different scenarios for the formation of the resulting layered carbonate deposits have emerged from petrographical and geochemical studies, but how environmental changes would exactly affect carbonate fabrics and geochemistry is less clear. The mechanisms and processes may differ within different facies along the downstream spring flow path, but also at different hierarchical scales - from the micrometer to the meter scale. In addition, the impact of early diagenesis on crystal texture and geochemical signal preservation is largely unknown. This understanding is vital to prevent erroneous interpretations in the geological record. The objective is to determine and quantify the relative importance and effects of particular environmentally controlled parameters on layered travertine precipitation and diagenetic alteration. This project will;(1)Define the nature of carbonate spring fabric and composition changes from micrometer to meter scale in 3 downstream environments and identify controlling mechanisms, processes on fabric development that could reflect environmental changes.(2)Quantify the parameters that allow describing the physico-chemical and microbial processes during carbonate precipitation in-situ and in controlled lab experiments.(3)Use these data to model carbonate precipitation within (hot) spring carbonate systems, with a focus on determining representative rates and masses. This will involve defining rate laws under static, flow conditions that account for the role of biotic processes on precipitation. To address this, a 3-stepped research approach is followed, including characterization of two natural spring systems (Part I) necessary to define the boundary conditions for laboratory and in-situ precipitation experiments in Part II. Part III will consist of the establishment of a thermodynamic-kinetic and eventually reaction transport model that accounts for the role of microbial presence/activity.Closing the loop between qualitative field- and lab-scale observations and controlled experimentation, numerical models will facilitate quantitative reconstructions of changes in environmental conditions recorded in recent to ancient spring deposits. The project will be conducted at the University of Fribourg, within the group of Prof. A. Foubert, where high-quality facilities for the different research aspects are available. It will take place in close collaboration with Swiss partner universities (Universities of Neufchatel, Bern, Lausanne and ETH Zürich) in Part I and II of the project. Active support from Prof. S. Fowler (KU Leuven) is confirmed for the modelling and parameterization of Part III of the study. Collaborations with the Institute for Geological and Geochemical Research (Hungary), the Geological Survey of Greece and the Institute for Genomic Biology at the University of Illinois (UIUC) will be crucial in the field study and experimental approaches.
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