Opendata, web and dolomites

STROMATA SIGNED

Micro-pyrites associated with organic material in ancient stromatolites: a new proxy attesting for their biogenicity

Total Cost €

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EC-Contrib. €

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Partnership

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 STROMATA project word cloud

Explore the words cloud of the STROMATA project. It provides you a very rough idea of what is the project "STROMATA" about.

metabolisms    stromatolite    record    interpreted    earliest    assessing    respiration    earth    pyrites    identifying    form    reaching    situ    isotope    modern    ancient    outstanding    biosphere    proposes    microbially    feg    stromata    stromatolites    experiment    attached    variations    away    scientific    first    influence    sims    accretionary    abiotic    samples    microbial    found    criteria    time    combining    pyrite    question    bigger    initiation    original    techniques    composition    fossils    tem    prevail    xanes    sulfides    mats    miss    origin    geological    ga    fossil    laminated    morphology    experimentally    small    proxies    morphological    structure    stable    sulfate    iron    determined    quest    traces    isotopic    archean    structures    biogenicity    metabolic    precipitation    contain    actual    life    nano    submicrometer    biological    shown    point    reflecting    history    sedimentary    compare    emblematic    nanosims    experimental    recorded   

Project "STROMATA" data sheet

The following table provides information about the project.

Coordinator
UNIVERSITE JEAN MONNET SAINT-ETIENNE 

Organization address
address: RUE TREFILERIE 10
city: SAINT ETIENNE
postcode: 42023
website: www.portail.univ-st-etienne.fr

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country France [FR]
 Total cost 1˙060˙250 €
 EC max contribution 1˙060˙250 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2017-STG
 Funding Scheme ERC-STG
 Starting year 2018
 Duration (year-month-day) from 2018-02-01   to  2023-01-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    UNIVERSITE JEAN MONNET SAINT-ETIENNE FR (SAINT ETIENNE) coordinator 1˙060˙250.00

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 Project objective

Identifying Archean fossil remains from the Earth’s early biosphere is ambitious and determining the biological origin and the associated metabolic pathways present in these fossils is one outstanding question in the bigger quest of how life evolved on Earth. Stromatolites and Microbially Induced Sedimentary Structures (MISS) are considered as one of the earliest evidence of Life in Earth’s history, and can be found from the Archean to the present time. Stromatolites are “attached laminated, sedimentary growth structure accretionary away from a point of initiation”, and their morphological comparison with actual structure prevail for assessing the microbial origin of ancient stromatolite in the geological record. However, experimental studies have shown that abiotic precipitation can also form structures with a similar morphology. Therefore stable isotope proxies have been used to identify past microbial metabolisms even if abiotic processes can also produce similar isotope composition. Therefore new biogenicity criteria are needed to be determined by studying modern and ancient stromatolites and by comparing them to abiotic experiment. Stromatolites and MISS contain submicrometer sulfides (pyrite) that can have recorded large isotopic variations, interpreted as reflecting the influence of various microbial metabolisms like microbial sulfate reduction and iron respiration. STROMATA proposes to define new criteria based on actual stromatolite and to test the earliest traces of life by studying in situ these nano-pyrites in various emblematic and well-characterized samples from the Archean. STROMATA will be the first far-reaching scientific in situ study of nano-pyrite in ancient (3.4 to 1.9 Ga) and modern microbial mats and stromatolites and will compare the results with experimentally produced abiotic pyrite. Due to the small scale of the pyrite, STROMATA will develop an original in situ approach by combining state of art techniques, SIMS, NanoSIMS, FEG-TEM, XANES.

 Publications

year authors and title journal last update
List of publications.
2020 Johanna Marin‐Carbonne, Vincent Busigny, Jennyfer Miot, Claire Rollion‐Bard, Elodie Muller, Nadja Drabon, Damien Jacob, Sylvain Pont, Martin Robyr, Tomaso R. R. Bontognali, Camille François, Stephanie Reynaud, Mark Van Zuilen, Pascal Philippot
In Situ Fe and S isotope analyses in pyrite from the 3.2 Ga Mendon Formation (Barberton Greenstone Belt, South Africa): Evidence for early microbial iron reduction
published pages: , ISSN: 1472-4677, DOI: 10.1111/gbi.12385
Geobiology 2020-03-11

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