Production of carbon-containing pyrite spherules induced by hyperthermophilic Thermococcales: a biosignature?

Autor: Chloé Truong, Sylvain Bernard, Pierre Le Pape, Guillaume Morin, Camille Baya, Pauline Merrot, Aurore Gorlas, François Guyot

Publikováno v: Frontiers in Microbiology, Vol 14 (2023)

Thermococcales, a major order of hyperthermophilic archaea inhabiting iron- and sulfur-rich anaerobic parts of hydrothermal deep-sea vents, are known to induce the formation of iron phosphates, greigite (Fe3S4) and abundant quantities of pyrite (FeS2

Externí odkaz: https://doaj.org/article/0168ddf19c834a2e9c21cd52adf3291b

Geochemical Controls on the Uranium Cycle in a Lake Watershed

Autor: Pierre Lefebvre, Arnaud Mangeret, Alkiviadis Gourgiotis, Pascale Louvat, Pierre Le Pape, Pierre Sabatier, Olivier Diez, Charlotte Cazala, Jérôme Gaillardet, Guillaume Morin

Publikováno v: ACS Earth and Space Chemistry
ACS Earth and Space Chemistry, 2023, 7 (5), pp.972-985. ⟨10.1021/acsearthspacechem.2c00348⟩

International audience; Understanding the uranium (U) cycle – reservoirs and processes – at the watershed scale is key to manage contaminated areas, to elucidate ore formation processes as well as to implement paleoenvironmental research. Here, w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a751b382e67dea87f69a1b24cfea3338
https://hal.science/hal-04117087/file/Postprint_Lefebvreetal_ACS-ESC_2023.pdf

Legacy (Pb, Cu, Zn) and emerging (Sb) trace metal contaminants in the road - highway stormwater pond continuum: a focus on geochemistry and speciation of antimony

Autor: Maëva Philippe, Pierre Le Pape, Eléonore Resongles, Rémi Freydier, Gautier Landrot, Corinne Casiot, Sophie Ayrault, Camille Baya

Publikováno v: Goldschmidt2022 abstracts.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::120a41abcc8993feaf0597f50db6eb1e
https://doi.org/10.46427/gold2022.10931

Bioavailability of chromium, nickel, iron and manganese in relation to their speciation in coastal sediments downstream of ultramafic catchments: A case study in New Caledonia

Autor: Pauline Merrot, Farid Juillot, Léonore Flipo, Mickaël Tharaud, Eric Viollier, Vincent Noël, Pierre Le Pape, Jean-Michel Fernandez, Benjamin Moreton, Guillaume Morin

Publikováno v: Chemosphere. 302:134643

Coastal sediments downstream of ultramafic catchments can show Ni and Cr concentration well above sediment quality guidelines. Despite their potential ecological impact, the bioavailability of these trace metals in such sedimentary settings has been

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d01a119cccb5232a764f24dc8dd76c4
https://doi.org/10.1016/j.chemosphere.2022.134643

Diagenetic formation of uranium-silica polymers in lake sediments over 3,300 years

Autor: Mathilde Zebracki, Pascale Louvat, Emmanuel Malet, Pierre Lefebvre, Didier Jézéquel, Pierre Le Pape, Alkiviadis Gourgiotis, John R. Bargar, Pascale Blanchart, Nicolas Menguy, Jean-Louis Reyss, Guillaume Morin, Pauline Merrot, Camille Baya, Charlotte Cazala, Pierre Sabatier, Jérôme Gaillardet, Arnaud Mangeret, Olivier Diez

Publikováno v: Proceedings of the National Academy of Sciences of the United States of America
Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 2021, 118 (4), pp.e2021844118. ⟨10.1073/pnas.2021844118⟩
Proceedings of the National Academy of Sciences of the United States of America, 2021, 118 (4), ⟨10.1073/pnas.2021844118⟩
Proceedings of the National Academy of Sciences of the United States of America, 2021, 118 (4), pp.e2021844118. ⟨10.1073/pnas.2021844118⟩
Proc Natl Acad Sci U S A

The long-term fate of uranium-contaminated sediments, especially downstream former mining areas, is a widespread environmental challenge. Essential for their management is the proper understanding of uranium (U) immobilization mechanisms in reducing

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::787926163059acf0215eb25bcf80a234
https://hal.archives-ouvertes.fr/hal-03151596