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, recycling and evolution of continents through time. Sediments are mixtures of detrital 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 the geological processes acting on continents as well as on the composition and mechanisms involved in the formation of crustal rocks.
At the scale of the global sedimentary system, I also study 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 the crust compositions.
I am currently involved in several projects looking at both modern and ancient detrital sediments from different locations. This includes modern sediments from the Himalayan river system, loess deposits, Archean sedimentary rocks from South Africa and Canada, and oceanic sediments entering the Nankai through in Japan.
Scientific activities and responsabilities:
- Reviewer for Chemical Geology, Earth and Planetary Science Letters, Geology, Environmental Science and Technology, Journal of Geology, Palaeogeography Palaeoclimatology and Palaeoecology.
- Participation to programs of the Smithonian Science Education for Teachers (SSEAT), Washington DC, USA (2014-2015)
- Main convener and chairman of a session entitled “Using sediments to understand the evolution of the Earth” at AGU, San Francisco, USA (2014)
- Organization of a scientific outreach events: “Les Tribulations Savantes”, Grenoble, France (2011-2012)
- President and Vice-president of the Earth Science PhD student Association of Grenoble (2009-2011)
- Sedimentary petrology (1st year students)
- Inorganic Geochemistry (3rd year students)
- Magmatism (4th year students)
- Field Trips in Volcanology
Previous and Current employments
Nov 2015 – Present Postdoctoral Fellowship, ClerVolc-Laboratoire Magmas et Volcans, Clermont-Ferrand, France
Sept 2013 – Sept 2015 Postdoctoral Fellowship, Carnegie Institution of Washington, USA
Jan–July 2013 Lab Engineer in Geochemistry, University of Grenoble, France
Oct 2009 – Nov 2012 PhD in Earth Sciences – Geochemistry, University of Grenoble, France
Sept 2007 – Sept 2009 M.Sc. in Earth Sciences, University of Grenoble, France
Sept 2004 – Sept 2007 B.Sc. in Physics, major Physics and Chemistry, University of Grenoble, France
Rang A :
- 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., 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.
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