RIDA - MD39

Name: RIDA - MD39
Start: 1984-04-30
End: 1984-05-25
Location: Mozambique Channel

Type	Oceanographic cruise
Ship	Marion Dufresne
Ship owner	IPEV
Dates	30/04/1984 - 25/05/1984
Chief scientist(s)	LECLAIRE LUCIEN
	INSTITUT DE PHYSIQUE DU GLOBE DE PARIS - UMR 7154, UMS 3454 1 rue Jussieu 75005 Paris +33 (0)1 83 95 74 00 https://www.ipgp.fr/
DOI	10.17600/84010511
Objective	Complete the geological study of the Davie Ridge in the Mozambique Channel. 2 approaches were implemented: geophysics: bathymetric, gravimetric and magnetic signature of the ridge, sedimentological and petrological: sampling of the rocky skeleton of the ridge and the top of its sedimentary cover. From 30/04/84 to 7/05/84: valorisation of the Djibouti transit at Mombasa from where the RIDA mission departs (MD 39).

Sea/Ocean

Mozambique Channel

(OCEAN INDIEN,CANAL DU MOZAMBIQUE)

Ports

Port of departure : Djibouti (Djibouti)

Port of return : Toliara (Madagascar)

Scientific Authority

INSTITUT DE PHYSIQUE DU GLOBE DE PARIS - UMR 7154, UMS 3454

1 rue Jussieu

75005 Paris

+33 (0)1 83 95 74 00

https://www.ipgp.fr/

Participating bodie(s)

TERRES AUSTRALES ET ANTARCTIQUES FRANCAISES

Discipline(s)

METEOROLOGY
MARINE GEOSCIENCES
PHYSICAL OCEANOGRAPHY

Code	Label	Quantity	PI
D03	Currents measured from ship drift	-	LECLAIRE LUCIEN
G01	Dredge	14 hauls	LECLAIRE LUCIEN
G04	Core soft bottom	30 cores	LECLAIRE LUCIEN
G27	Gravity measurements	5000	LECLAIRE LUCIEN
G28	Magnetic measurements	5000	LECLAIRE LUCIEN
G73	Single-beam echosounding Sondage par faisceau large	5000	LECLAIRE LUCIEN
H13	Bathythermograph	71 profiles	LECLAIRE LUCIEN
H71	Surface measurements underway (T,S)	-	LECLAIRE LUCIEN

Summary of measurements

-Measurements done during the Djibouti-Mombasa transit.
-1,850 miles: bathymetry, magnetism, gravimetry and temperature and salinity measurements.
-37 XBTs (Sippican).
-RIDA (MD 39).
-3,200 miles: bathymetry, magnetism, gravimetry and temperature and salinity measurements.
-34 XBTs (Sippican).
-30 piston cores (large diameter), i.e. about 125 m of sediment.
-14 dredging operations, i.e. 2 tons of rocks and sediments.
-4 colour shooting sessions.

Location map

Positionning system

Geodetic system : VALEUR INDEFINIE

Bibliography

Publications

Charles Claire, Pelleter Ewan , Révillon Sidonie, Nonnotte Philippe, Jorry Stephan , Kluska Jean-Michel (2020). Intermediate and deep ocean current circulation in the Mozambique Channel: New insights from ferromanganese crust Nd isotopes. Marine Geology, 430, 106356 (13p.). Publisher's official version : https://doi.org/10.1016/j.margeo.2020.106356 , Open Access version : https://archimer.ifremer.fr/doc/00653/76488/

Thesis using campaign data

Charles Claire (2022). Reconstructions paléocéanographiques et paléogéographiques du Canal du Mozambique (Océan Indien) : apport de l'étude isotopique des encroûtements Fe-Mn / Paleoceanographic and paleogeographic reconstructions of the Mozambique Channel (Indian Ocean) : contribution of the isotopic study of Fe-Mn crusts. PhD Thesis, Université de Bretagne Occidentale.