REFRAMARGE (LEG 1)

Name: REFRAMARGE (LEG 1)
Start: 1987-03-30
End: 1987-04-14
Location: Northeast Atlantic Ocean (40W)

Type	Oceanographic cruise
Ship	Le Suroît
Ship owner	Ifremer
Dates	30/03/1987 - 14/04/1987
Chief scientist(s)	SIBUET Jean-Claude
	GEO-OCEAN - UMR 6538 Univ. Brest, CNRS, Ifremer, Univ. Bretagne Sud Place Nicolas Copernic 29280 Plouzané https://www.geo-ocean.fr/
DOI	10.17600/87002011
Objective	Seismic profiles on the continental margin of Goban spur and West of Wales to determine the speed of Earth crust and mantle.

Sea/Ocean

Northeast Atlantic Ocean (40W)

Ports

Port of departure : Brest (France)

Port of return : Vigo (Spain)

Project

EUROSEISMIC EUROPEAN SEISMIC METADATA AND INFORMATION CENTRE

Scientific Authority

GÉOSCIENCES MARINES

Centre Ifremer Bretagne

ZI Pointe du Diable

29280 Plouzané

+33(0)2 98.22.42.24

Participating bodie(s)

IFREMER, UNIVERSITE (BREST, PARIS 6), IOS (USA), GSI (DUBLIN)

Discipline(s)

PHYSICAL OCEANOGRAPHY
MARINE GEOSCIENCES

Code	Label	Quantity	PI
G26	Seismic refraction IOS digital OBS	8	SIBUET Jean-Claude
G28	Magnetic measurements	65	SIBUET Jean-Claude
G73	Single-beam echosounding	-	SIBUET Jean-Claude
G75	Single channel seismic reflection 4-tracks + 3.5 kHz	65	SIBUET Jean-Claude
H13	Bathythermograph	2 profiles	SIBUET Jean-Claude

Summary of measurements

-8 refraction profiles with 4 OBS (IOS WORMLEY, digital); Source: 8 airguns of 16 l, shots every 2 min, speed 5 knots.
-65 profiles: seismic reflection at 10 knots with 2 TWG and 4-trace streamer, magnetism, 3.5 kHz.
-2 Sippican XBT probes released.

Location map

Positionning system

Geodetic system : WORLD GEODETIC SYSTEM 1972 = WGS72

Positioning system : Sat Transit + GPS (Sercel) en WGS72 pblt

Data managed by SISMER

Bibliography

Publications

Sibuet Jean-Claude, Tucholke Brian E. (2012). The geodynamic province of transitional lithosphere adjacent to magma-poor continental margins. Geological Society, London, Special Publications, 369. https://doi.org/10.1144/SP369.15

Welford J. Kim, Hall Jeremy, Sibuet Jean-Claude, Srivastava Shiri P. (2010). Structure across the northeastern margin of Flemish Cap, offshore Newfoundland from Erable multichannel seismic reflection profiles: evidence for a transtensional rifting environment. Geophysical Journal International, 183(2), 572-U51. Publisher's official version : https://doi.org/10.1111/j.1365-246X.2010.04779.x , Open Access version : https://archimer.ifremer.fr/doc/00017/12776/

Sibuet Jean-Claude (1992). New constraints on the formation of the non-volcanic continental Galicia–Flemish Cap conjugate margins. Journal Of The Geological Society, 149, 829-840. https://doi.org/10.1144/gsjgs.149.5.0829

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

Recq Maurice, Whitmarsh Robert B, Sibuet Jean-Claude, White Robert S, Lyness David (1996). Structure sismique de la ride de péridotite a l'Ouest du Banc de Galice (Ouest Ibérie). Comptes Rendus de l'Academie des Sciences Serie Ii Fascicule A-sciences de la Terre et des Planetes, 322(7), 571-578.

Louvel Veronique, Sibuet Jean-Claude, Whitmarsh Robert B, Horsefield Susan J, White Robert S (1992). Modélisation gravimétrique de la marge de l'Éperon de Goban (SW Irlande) : Conséquences sur les modèles de formation des marges continentales stables. Comptes Rendus de l'Academie des Sciences Serie II, 315(11), 1333-1340.

References of Technical Reports

(1987) Compte-rendu de Campagne. Réframarge.