WALVIS CH86

Name: WALVIS CH86
Start: 1979-02-23
End: 1979-03-17
Location: Southeast Atlantic Ocean (20W)

Type	Oceanographic cruise
Ship	Jean Charcot
Ship owner	Ifremer
Dates	23/02/1979 - 17/03/1979
Chief scientist(s)	NEEDHAM Hubert David
	GEO-OCEAN - UMR 6538 Univ. Brest, CNRS, Ifremer, Univ. Bretagne Sud Place Nicolas Copernic 29280 Plouzané https://www.geo-ocean.fr/
DOI	10.17600/79000212
Objective	Structural study of the Walvis Ridge whose origin is poorly known: in particular, to better understand the contribution of fracture zones to the geometry of the ridge and to recognize other fossil structures of the Mid-Oceanic Ridge. In addition, the cruise aimed to contribute to the definition of the drilling sites planned in the framework of IPOD. The different scientific objectives of the cruise: see cruise report.

Sea/Ocean

Southeast Atlantic Ocean (20W)

(ATLANTIQUE SUD EST)

Ports

Port of departure : Cape Town (South Africa)

Port of return : Cape Town (South Africa)

Scientific Authority

GÉOSCIENCES MARINES

Centre Ifremer Bretagne

ZI Pointe du Diable

29280 Plouzané

+33(0)2 98.22.42.24

Participating bodie(s)

CENTRE OCEANOLOGIQUE DE BRETAGNE BREST

Discipline(s)

METEOROLOGY
MARINE GEOSCIENCES
PHYSICAL OCEANOGRAPHY

Code	Label	Quantity	PI
D90	Other physical oceanographic meas. Mesures isolees de temperature en surface	4 measurements	NEEDHAM Hubert David
G01	Dredge	6 hauls	NEEDHAM Hubert David
G04	Core soft bottom	7 cores	NEEDHAM Hubert David
G08	Bottom photography	1 images	NEEDHAM Hubert David
G24	Long to short range side scan sonar GLORIA	-	NEEDHAM Hubert David
G27	Gravity measurements	-	NEEDHAM Hubert David
G28	Magnetic measurements	6000	NEEDHAM Hubert David
G73	Single-beam echosounding	6000	NEEDHAM Hubert David
G74	Multi-beam echosounding Sea Beam	7000	NEEDHAM Hubert David
G75	Single channel seismic reflection 50.000 tirs sismique + sondeur 3.5 kHz	-	NEEDHAM Hubert David
M06	Routine standard measurements Toutes les 4 heures	-	NEEDHAM Hubert David

Summary of measurements

-AT STATION :
-8 dredging stations including 6 successful ones.
-7 coring stations and water temperature profiles.
-2 spot camera stations including one success story.
-UNDERWAY :
-Continuous use of magnetometer, gravimeter, and 3.5 kHz sounder.
-Light reflection seismic data recording (114 hours).
-7,427 miles travelled.

Location map

Positionning system

Geodetic system : WORLD GEODETIC SYSTEM 1966 = WGS66

Positioning system : SATELLITE (recept ITT: WGS 66 pblt)

Sampling operations

Name	Dive	Equipement	Date	Location	Depth(m)
WV3-DR01	-	Drague à roche (TYPE NON PRECISE)	19790301 00:00:0001/03/1979 00:00:00	26° 25.600' S 6° 14.500' E	2567
WV3-DR02	-	Drague à roche (TYPE NON PRECISE)	19790301 00:00:0001/03/1979 00:00:00	26° 25.600' S 6° 14.500' E	2567
WV3-DR03	-	Drague à roche (TYPE NON PRECISE)	19790301 00:00:0001/03/1979 00:00:00	26° 29.800' S 6° 11.900' E	2368
WV3-DR04	-	Drague à roche (TYPE NON PRECISE)	19790303 00:00:0003/03/1979 00:00:00	27° 15.500' S 4° 23.500' E	3295
WV3-DR05	-	Drague à roche (TYPE NON PRECISE)	19790306 00:00:0006/03/1979 00:00:00	29° 8.500' S 3° 8.300' E	2720
WV3-DR06	-	Drague à roche (TYPE NON PRECISE)	19790306 00:00:0006/03/1979 00:00:00	29° 5.800' S 3° 5.600' E	2560
WV3-DR07	-	Drague à roche (TYPE NON PRECISE)	19790311 00:00:0011/03/1979 00:00:00	30° 46.500' S 3° 19.000' E	2200
WV3-KS01	-	Carottier KULLENBERG	19790304 00:00:0004/03/1979 00:00:00	28° 5.005' S 1° 34.400' E	4446
WV3-KS02	-	Carottier KULLENBERG	19790305 00:00:0005/03/1979 00:00:00	28° 26.000' S 2° 5.000' E	4017
WV3-KS03	-	Carottier KULLENBERG	19790305 00:00:0005/03/1979 00:00:00	28° 40.100' S 2° 23.000' E	3750
WV3-KS04	-	Carottier KULLENBERG	19790306 00:00:0006/03/1979 00:00:00	29° 3.800' S 2° 56.700' E	2450
WV3-KS05	-	Carottier KULLENBERG	19790307 00:00:0007/03/1979 00:00:00	29° 11.500' S 3° 11.500' E	3970
WV3-KS06	-	Carottier KULLENBERG	19790308 00:00:0008/03/1979 00:00:00	29° 24.400' S 3° 32.700' E	4857
WV3-KS07	-	Carottier KULLENBERG	19790312 00:00:0012/03/1979 00:00:00	31° 14.100' S 4° 37.400' E	4880

Bibliography

Publications

Sibuet Myriam, Lambert Claude E., Chesselet Roger, Laubier Lucien (1989). Density of the major size groups of benthic fauna and trophic input in deep basins of the Atlantic Ocean. Journal Of Marine Research, 47(4), 851-867. https://doi.org/10.1357/002224089785076064

References of Articles published in other Periodicals or Scientific Works acclaimed in the Field

Macpherson E, Segonzac Michel (2005). Species of the genus Munidopsis (Crustacea, Decapoda, Galatheidae) from the deep Atlantic Ocean, including cold-seep and hydrothermal vent areas. Zootaxa, 1095(0), 3-60.

Auffret Gerard, Sichler Bertrand, Coleno B (1981). Deep-sea sediments texture and magnetic fabric, indicators of bottom currents regime. Oceanologica Acta, 4(4), 475-488. Open Access version : https://archimer.ifremer.fr/doc/00000/5358/

References of Technical Reports

(1979) Quarts. Walvis 3 du 24 février 1979 au 15 mars 1979.

(1979) Compte-rendu. Campagne WALVIS : Géologie-Géophysique (Opération Marge Africaine).

French Oceanographic Cruises

WALVIS CH86

Data managed by SISMER

Sampling operations

Bibliography