SCRATCH

Type Oceanographic cruise
Ship Marion Dufresne
Ship owner TAAF
Dates 01/07/2021 - 22/07/2021
Chief scientist(s) BERTHOD Carole , ZARAGOSI Sébastien ORCID, FAMIN Vincent

UNIVERSITE DE CLERMONT AUVERGNE

34 avenue Carnot

BP 185

63006 CLERMONT-FERRAND

+33(0)4 73.40.63.63

https://www.uca.fr/
DOI 10.17600/18002274
Objective

SCRATCH is a sampling campaign on board the oceanographic vessel Marion Dufresne in the French Exclusive Economic Zones (Mayotte, Glorieuses, Tromelin and Réunion). During this mission, we carried out 35 CTD rosettes, 19 plankton nets, 12 coring and 12 dredges. The samples collected will be used by nine laboratories (LMV-UCA-OPGC, EPOC, ENTROPIE, LGSR, IPGP, BRGM, IFREMER-GM, CEREGE, LSCE) supported by seven national to international scientific programs (Coyotes, Phenomap, iMonsoon ANRs, FRB COCCACE, LEFE IndSO and LEFE / EC2CO CHEMICAL INSU projects and the EU Interreg grant « HATARI »). Analyzes carried on the collected material will allow us to meet the following goals: 

  • Characterize the planktonic flora and fauna;

  • Determine the impact of the islands on the functioning and anthropization of the surrounding marine ecosystems;

  • Study the evolution of the Indian Ocean dipole during the Pleistocene

  • Improve knowledge of the regional geodynamics of the archipelagos of Comoros and Glorioso

  • Characterize sediment transfers on the slopes of coral islands

In order to meet these multiple scientific aims, our SCRATCH campaign is multidisciplinary by bringing together many scientific fields and by combining different methodologies and analyzes which are mutually enriched.

Data managed by SISMER

Sampling operations

Bibliography

Publications

Boymond P., Feuillet N., Thinon Isabelle, Scholtès L., Zaragosi S., Leroy S., Lemoine A. (2025). En‐échelon Rifting and Origin of the Volcanism in the Comoros. Geochemistry, Geophysics, Geosystems, 26(2), e2024GC011576 (27p.). Publisher's official version : https://doi.org/10.1029/2024GC011576 , Open Access version : https://archimer.ifremer.fr/doc/00937/104848/


Dournaux Meredith, Tulet Pierre, Pianezze Joris, Brioude Jérome, Metzger Jean-Marc, Thyssen Melilotus. Origin, size distribution and hygroscopic properties of marine aerosols in the south-western Indian Ocean: report of 6 campaigns of shipborne observations. EGUsphere IN PRESS. Publisher's official version : https://doi.org/10.5194/egusphere-2024-3747 , Open Access version : https://archimer.ifremer.fr/doc/00931/104297/


Rusquet Anaïs, Famin Vincent, Michon Laurent, Quidelleur Xavier, Nauret François, Danišík Martin, Ruffet Gilles, Berthod Carole, Revillon Sidonie, Bachèlery Patrick, Thinon Isabelle, Lemoine Anne, Leroy Sylvie, Zaragosi Sébastien, Thivet Simon, Bernard Julien, Gourbet Loraine, Médard Etienne, Toulier Alix (2025). Phases of Magmatism and Tectonics Along the Madagascar‐Comoros Volcanic Chain, and Synchronous Changes in the Kinematics of the Lwandle and Somalia Plates. Journal Of Geophysical Research-solid Earth, 130(1), e2024JB029488 (28p.). Publisher's official version : https://doi.org/10.1029/2024JB029488 , Open Access version : https://archimer.ifremer.fr/doc/00929/104058/


Rusquet Anaïs, Famin Vincent, Quidelleur Xavier, Michon Laurent, Nauret François, Danišík Martin, Thinon Isabelle, Leroy Sylvie, Lemoine Anne (2023). Pliocene-to-Holocene volcano-tectonic activity on Mohéli Island (Comoros archipelago) constrained by new K-Ar ages. Journal Of Volcanology And Geothermal Research, 442, 107896 (14p.). Publisher's official version : https://doi.org/10.1016/j.jvolgeores.2023.107896 , Open Access version : https://archimer.ifremer.fr/doc/00850/96233/


Pressé Guillaume (2023). Les Terres australes et antarctiques françaises : des territoires au cœur des enjeux de la planète. Civitas Europa, 1(48), 281-312. Publisher's official version : https://doi.org/10.3917/civit.048.0281 , Open Access version : https://archimer.ifremer.fr/doc/00824/93605/


Van Der Woerd Jérôme, Famin Vincent, Humler Eric (2022). Special issue Comptes-Rendus Geoscience: The Mayotte seismo-volcanic crisis of 2018–2021 in the eastern Comoros archipelago (Mozambique channel). Comptes Rendus Geoscience, 354(S2), 1-6. Publisher's official version : https://doi.org/10.5802/crgeos.196 , Open Access version : https://archimer.ifremer.fr/doc/00817/92895/


Berthod Carole, Komorowski Jean-Christophe, Gurioli Lucia, Médard Etienne, Bachèlery Patrick, Besson Pascale, Verdurme Pauline, Chevrel Oryaëlle, Di Muro Andrea, Peltier Aline, Devidal Jean-Luc, Nowak Sophie, Thinon Isabelle, Burckel Pierre, Hidalgo Samia, Deplus Christine, Loubrieu Benoit, Pierre Delphine, Bermell Sylvain, Pitel-Roudaut MathildeORCID, Réaud Yvan, Fouchard Sacha, Bickert ManonORCID, Le Friant Anne, Paquet Fabien, Feuillet Nathalie, Jorry StephanORCID, Fouquet Yves, Rinnert EmmanuelORCID, Cathalot CecileORCID, Lebas Elodie (2022). Temporal magmatic evolution of the Fani Maoré submarine eruption 50 km east of Mayotte revealed by in situ sampling and petrological monitoring. Comptes Rendus Geoscience, 354(S2), 195-223. Publisher's official version : https://doi.org/10.5802/crgeos.155 , Open Access version : https://archimer.ifremer.fr/doc/00810/92192/


References of Technical Reports

Berthod Carole, Zaragosi Sebastien, Famin Vincent, Et L'Équipe Scratch (2021). Rapport de la campagne océanographique MD233 – SCRATCH. N/O Marion Dufresne. La Réunion 30 juin 2021 – 22 juillet 2021. https://archimer.ifremer.fr/doc/00759/87131/


Thesis using campaign data

Boymond Pierre (2024). Volcano-tectonic interactions in the Comoros archipelago. PhD Thesis, Université Paris Cité.


Chandelier Guillaume (2024). Etude de l'influence des îles océaniques sur les écosystèmes hauturiers : contribution à la production océanique et anthropisation du milieu marin. PhD Thesis, Université de La Réunion.


Rusquet, A. (2024). Volcanisme et tectonique de l'archipel des Comores. Thèse de doctorat de l'université Paris Cité, 200 pp.

Mercury Nicolas (2023). Analyse et contexte de la sismicité des 10 premiers mois de la crise sismo-volcanique de Mayotte (2018-2019). PhD Thesis, Université de Strasbourg.


Masquelet Charles (2023). Magmatisme, héritage et déformation autour de l’archipel des Comores, dans le bassin de Somalie. Implications géodynamiques. PhD Thesis, Université Sorbonne.