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Chargé(e) de Recherche,
CNRS |
Research interests:
I use chemical and isotopic compositions (mainly Sm-Nd, Lu-Hf, Rb-Sr, and U-Th-Pb isotopic systems) of modern sediments or ancient sedimentary rocks to study the origin, composition, and evolution of the continents and the oceans through time.
Detrital sediments and sedimentary rocks such as sandstone or shale are mixtures of mineral grains derived from the erosion of continents. I am interested in the chemical and isotopic signatures of these minerals because they record precious information on geological and sedimentary processes acting on continents as well as on the composition and the formation of crustal rocks.
Chemical sedimentary rocks such as banded iron formation, carbonate, or chert that formed in seawater can trap complementary information on the composition of seawater, the oxygenation of the atmosphere and oceans, and the interactions between oceans and continents. In my research, I use chemical sedimentary rocks to better understand past environmental conditions at the beginning of Earth history.
At the scale of the global sedimentary system, I am also interested in the recycling of sedimentary materials in subduction zones and the effects that such a process may have on the long-term evolution of the mantle and crust compositions.
I am currently involved in several projects looking at ancient detrital and chemical sediments from different Archean cratons worldwide. Most of my current researches are however focused on banded iron formations as part of my ERC Starting grant project.
Current employment
2019 – Chargé de Recherche CNRS, Laboratoire Magmas et Volcans, Clermont-Ferrand, France
Previous employments
2016 – 2019 Ambizione Fellowship, ETH Zürich, Switzerland
2015 – 2016 Auvergne Fellowship, Laboratoire Magmas et Volcans, Clermont-Ferrand, France
2013 – 2015 Postdoctoral Fellowship, Carnegie Institution of Washington, USA
2013 Lab Engineer in Geochemistry, University of Grenoble, France
Academics
2009 – 2012 PhD in Earth Sciences – Geochemistry, University of Grenoble, France – Advisor: Catherine Chauvel
2007 – 2009 M.Sc. in Earth Sciences, University of Grenoble, France
2004 – 2007 B.Sc. in Physics, major Physics and Chemistry, University of Grenoble, France
Publications LMV:
Rang A :
- Carlson R.W., Garçon M., O'neil J., Reimink J., Rizo H. (2019). The Nature of Earth’s First Crust. Chemical Geology DOI:10.1016/j.chemgeo.2019.119321 .
- Garçon M., Boyet M., Carlson R.W., Horan M.F., Auclair D., Mock T.D. (2018). Factors influencing the precision and accuracy of Nd isotope measurements by thermal ionization mass spectrometry. Chemical Geology vol.476, p.493-514, DOI:10.1016/j.chemgeo.2017.12.003 .
Rang B et C :
- Garçon M. (2019). Crustal growth and composition: a new model based on the Nd-Hf isotopic composition of detrital sedimentary rocks. AGU Fall Meeting, V33B-04, San-Francisco, Etats-Unis, 9-13 decembre 2019.
- Garçon M., Boyet M., Carlson R.W., Shirey S.B., Vance D. (2018). Using Archean sedimentary rocks from the Superior Province to decipher the crustal history and composition of the Canadian Shield. EGU, Vienna, Austria.
- Boyet M., Bouvier A., Hammouda T., Garçon M. (2017). Nucleosynthetic anomalies in chondrites relative to the Earth: the debate over the 146Sm-142Nd systematics. Goldschmidt, Paris, France.
- Garçon M., Boyet M., Carlson R.W., Shirey S.B., Horan M.F. (2017). 142Nd anomalies in Mid-to Late Archean sedimentary Rocks: Large scale recycling of Hadean crust?. Goldschmidt, Paris, France.
Previous Publications:
Boyet M., Bouvier A., Frossard P., Hammouda T., Garçon M., Gannoun A., Enstatite chondrites EL3 as building blocks for the Earth: the debate over the 146Sm-142Nd systematics. Earth and Planetary Science Letters, 488, 68-78. DOI: 10.1016/j.epsl.2018.02.004
Henshall T., Cook D.L., Garçon M., Schönbächler M., High-precision Strontium isotope analysis of geological samples by thermal ionisation mass spectrometry. Chemical Geology, 482, 113-120. DOI: 10.1016/j.chemgeo.2018.02.010
Horan M.F., Carlson R.W., Walker R.J., Jackson M., Garçon M., Norman M., Tracking Hadean processes in modern basalts with 142-Neodymium. Earth and Planetary Science Letters, 484, 184-191 (2018). DOI: 10.1016/j.epsl.2017.12.017
Garçon M., Carlson R.W., Shirey S.B., Arndt N.T., Horan M.F., Mock T.D., Erosion of Archean continents: The Sm-Nd and Lu-Hf isotopic record of Barberton sedimentary rocks. Geochimica et Cosmochimica Acta, 206, 216-235 (2017). DOI: 10.1016/j.gca.2017.03.006
Garçon M., Sauzéat L., Carlson R.W., Shirey S.B., Simon M., Balter V., Boyet M., Nitrile, Latex, Neoprene and Vinyl Gloves: A Primary Source of Contamination for Trace Element and Zn Isotopic Analyses in Geological and Biological Samples. Geostandards and Geoanalytical Research, 41, 3, 367-380 (2017). DOI: 10.1111/ggr.12161
Sauzéat L., Rudnick R.L., Chauvel C., Garçon M., Tang M., New perspectives on the Li isotopic composition of the upper continental crust and its weathering signature (2015). Earth and Planetary Science Letters, 428, 181-192.
Guillot S., Garçon M., Weinman B., Gajurel A., Tisserand D., France-Lanord C., Geen A., Chakraborty S., Huyghe P., Upreti B.N., Charlet L., Origin of Arsenic anomalies in Late Pleistocene to Holocene sediments in the Nawalparasi District (Terai, Nepal) (2015). Environmental Earth Sciences, doi: 10.1007/s12665-015-4277-y
Garçon M., Chauvel C., Where is basalt in river sediments and why does it matters? (2014). Earth and Planetary Science Letters, 407, 61-69.
Garçon M., Chauvel C., France-Lanord C., Limonta M., Garzanti E., Which minerals control Nd-Hf-Sr-Pb isotopic compositions of river sediments? (2014). Chemical Geology, 364, 42-55.
Chauvel C., Garçon M., Bureau S., Besnault A., Jahn B.-M., Ding Z., Constraints from loess on the Hf-Nd isotopic composition of the upper continental crust (2014). Earth and Planetary Science Letters, 388, 48-58.
Simonneau A., Chapron E., Garçon M., Winiarski T., Graz Y., Chauvel C., Debret M., Motellica-Heino M., Desmet M., Di Giovanni C., Tracking Holocene glacial and high-altitude alpine environments fluctuations from minerogenic and organic markers in proglacial lake sediments (Lake Blanc Huez, Western French Alps) (2014).Quaternary Science Reviews, 89, 27-43.
Garçon M., Chauvel C., France-Lanord C., Limonta M., Garzanti E., Removing the “heavy mineral effect” to obtain a new Pb isotopic value for the upper crust (2013). Geochemistry Geophysics Geosystems, 14, 9, doi: 10.1002/ggge.20219
Garçon M., Chauvel C., France-Lanord C., Huyghe P., Lave J., Sedimentary processes decouple Nd-Hf isotopes in river sediments on continents (2013). Geochimica et Cosmochimica Acta 121, 177-195.
Garçon M., Chauvel C., Chapron E., Fain X., Lin M., Campillo S., Bureau S., Desmet M., Bailly-Maitre M.-C., Charlet L., Silver and lead in high-altitude lake sediments: Proxies for climate changes and human activities(2012). Applied Geochemistry, 27,3, 760-773
Garçon M., Chauvel C., Bureau S. Beach placer, a proxy for the average Nd and Hf isotopic composition of a continental area (2011). Chemical Geology, 287, 3-4, 182-192
Expedition 333 Scientists, including Garçon M.. NanTroSEIZE Stage 2: subduction inputs 2 and heat flow. IODP Prel. Rept., 333(2011). doi:10.2204/iodp.pr.333.2011
