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. €

0

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.

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

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

Map

 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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