Basalts, underplated gabbros and pyroxenites record the rifting process of the West Iberian margin

Mineralogy and Petrology

Volumn 67, Issue 3-4, 1999, Pages 111-142

  Cornen, G ^a   Girardeau, J ^a   Monnier, C ^a  

^a UNIVERSITÉ DE NANTES   (France)

Author keywords

[No Author keywords available]

Indexed keywords

BASALT; CONTINENTAL CRUST; GABBRO; LITHOLOGY; MAGMA; MANTLE SOURCE; PYROXENITE; RIFTING; SPINEL; UNDERPLATING;

ATLANTIC OCEAN; IBERIAN MARGIN;

EID: 1542605618     PISSN: 09300708     EISSN: None     Source Type: Journal    
DOI: 10.1007/BF01161518     Document Type: Article

References (98)

1. Agrinier P, Mével C, Girardeau J (1988) Hydrothermal alteration of the peridotites cored at the ocean/continent boundary of the Iberian margin: petrologic and stable isotope evidence. Proc Ocean Drill Program Sci Results 103: 225-234
2. Agrinier P, Mével C, Bosch D, Javoy M (1993) Metasomatic hydrous fluids in amphibole peridotites from Zabargad Island (Red Sea). Earth Planet Sci Lett 120: 187-205
3. Alibert C (1985) A Sr-Nd isotope and REE study of late Triassic dolerites from the Pyrenees (France) and the Messejana Dyke (Spain and Portugal). Earth Planet Sci Lett 73: 81-90
4. Al'mukhamedov AI, Sborshikov IM, Lobkoskiy LI (1991) New data on the structure of the Gorringe ridge in the North Atlantic. Trans USSR Acad Sci Earth Sci (Doklady) 309: 131-133
5. Aoki K, Shiba I (1973) Pyroxenes from lherzolite inclusions of Itinome-gata, Japan. Lithos 6: 41-51
6. Arai S, Matsukage K, Isobe E, Vysotskiy S (1997) Concentration of incompatible elements in oceanic mantle: effect of melt/wall interaction in stagnant or failed melt conduits within peridotite. Geochim Cosmochim Acta 61: 671-675
7. Arndt NT, Czamanske GK, Wooden JL, Fedorenko VA (1993) Mantle and crustal contributions to continental flood volcanism. Tectonophysics 223: 39-52
8. Auzende J-M, Olivet J-M, Charvet J, Le Lann A, Le Pichon X, Monteiro JH, Nicolas A, Ribeiro A (1978) Sampling and observation of mantle and crust on Gorringe Bank. Nature 273: 45-49
9. Auzende J-M, Charvet J, Le Lann A, Le Pichon X, Monteiro JH, Nicolas A, Olivet J-M, Ribeiro A (1979) Le Banc de Gorringe: résultats de la campagne CYAGOR (Août 1977). Bull Soc Géol fr XXI 5: 545-556
10. Benoit M, Polvé M, Ceuleneer G (1996) Trace element and isotopic characterization of mafic cumulates in a fossil mantle diapir (Oman Ophiolite). Chem Geol 134: 199-214
11. Bernard-Griffith J, Gruau G, Cornen G, Azambre B, Macé J (1997) Continental lithospheric contribution to alkaline magmatism: isotopic (Nd, Sr, Pb) and geochemical (REE) evidence from Serra de Monchique and Mount Ormonde complexes. J Petrol 38: 115-132
12. Bertrand H, Dostal J, Dupuy C (1982) Geochemistry of early mesozoic tholeiites from Morocco. Earth Planet Sci Lett 58: 225-239
13. Beslier M-O, Girardeau J, Boillot G (1990) Structure and kinematics of emplacement of peridotites uplifted during continental rifting: results of the Galinaute dives on Galicia margin (Spain). Tectonophysics 184: 321-343
14. Beslier M-O, Ask M, Boillot G (1993) Ocean-continent boundary in the Iberia Abyssal Plain from multichannel seismic data. Tectonophysics 218: 383-393
15. Bloomer SH, Natland JH, Fisher RJ (1989) Mineral relationships in gabbroic rocks from fracture zones of Indian Ocean ridges: evidence for extensive fractionation, parental diversity and boundary-layer recrystallization. In: Saunders AD, Norry MJ (eds) Magmatism in the ocean basins. Geol Soc Sp Publ 42: 107-124
16. Bodinier JL (1989) Distribution des Terres Rares dans le Massif de Lanzo et de l'Ariège. Doc and Trav CGG Montpellier 22, 177pp
17. Bodinier JL, Lorand JP, Dostal J, Dupuy C (1987) Geochemistry of amphibole pyroxenite veins from the Lherz and Freychinède ultramafic bodies (Ariège, French Pyrénées). Bull Mineral 110: 345-358
18. Boillot, G, Grimaud S, Mauffret A, Mougenot D, Kornprobst J (1980) Ocean-continent boundary off the Iberia margin: a serpentinite diapir west of the Galicia Bank. Earth Planet Sci Lett 48: 23-34
19. Boillot G, Girardeau J, Kornprobst J (1988) The rifting of the Galicia margin: crustal thinning and emplacement of mantle rocks on the sea floor. Proc Ocean Drill Program Sci Results 103: 741-756
20. Boillot, G, Agrinier P, Beslier M-O, Cornen G, Froitzheim N, Gardien V, Girardeau J, Gil-Ibarguchi J-I, Kornprobst J, Moullade M, Schärer U, Vanney J-R (1995) A lithospheric syn-rift shear zone at the ocean-continent transition: preliminary results of the Galinaute II cruise (Nautile dives on the Galicia Bank, Spain). CR Acad Sci Paris, 321, IIa: 1171-1178
21. Bonatti E, Michael PJ (1989) Mantle peridotites from continental rifts to ocean basins to subduction zones. Earth Planet Sci Lett 91: 297-311
22. Bonatti E, Seyler M (1987) Crustal underplating and evolution in the Red Sea rift; uplifted gabbro/gneiss crustal complexes on Zabargad and Brothers islands. J Geophys Res 92 12,803-12,821
23. Boudier F, Nicolas A, Ji S, Kienast JR, Mével C (1988) The gneiss of Zabargad Island: deep crust of a rift. Tectonophysics 150: 209-227
24. Bougault H, Joron JL, Treuil M, Maury R (1985) Local versus regional mantle heterogeneities: evidence from hygromagmaphile elements. Proc Ocean Drill Program Initial Rep 82: 459-482
25. Cannat M, Seyler M (1995) Transform tectonics, metamorphic plagioclase and amphibolitization in ultramafic rocks of the Vema transform fault (Atlantic Ocean). Earth Planet Sci Lett 133: 283-298
26. Charpentier S, Kornprobst J, Chazot G, Cornen G, Boillot G (1998) Interaction entre lithosphére et asthénosphère au cours de l'ouverture océanique: données isotopiques préliminaires sur la marge passive de Galice (Atlantique-Nord). CR Acad Sci Paris 326: 757-762
27. Comas MC, Sánchez-Gómez M, Cornen G, de Kaenel E (1996) Serpentinized peridotite breccia and olistostrome on basement highs of the Iberia Abyssal Plain: implications for tectonic margin evolution. Proc Ocean Drill Program Sci Results 149: 577-591
28. Cornen G (1982) Petrology of the alkaline volcanism of Gorringe Bank (Southwest Portugal). Marine Geol 47: 101-130
29. Cornen G, Beslier M-O, Girardeau J (1996) Petrologic characteristics of the ultramafic rocks from the Ocean/continent transition in the Iberia Abyssal Plain. Proc Ocean Drill Program Sci Results 149, 21: 377-395
30. Cotten J, Le Dez A, Bau M, Caroff M, Maury RC, Dulski P, Fourcade S, Bohn M, Brousse R (1995) Origin of anomalous rare-earth element and yttrium enrichments in subaerially exposed basalts: evidence from French Polynesia. Chem Geol 119: 115-138
31. Cyagor I Group (1979) Campagne CYAGOR 25 Juillet-26 Août 1977 Résultats des campagnes à la mer. Pub CNEXO 17, 75pp
32. Cyagor II Group (1984a) Géologie du Banc de Gorringe Campagne GYAGOR II 25 Mai-18 Juin 1981 Résultats des campagnes à la mer. Pub CNEXO 27, 73pp
33. Cyagor II Group (1984b) Intraoceanic tectonism of the Gorringe Bank: observation by submersible. In: Gass JG, Lippard SJ, Shelton AW (eds) Ophiolite and oceanic lithosphere. Geol Soc London, Spec Public, pp 113-120
34. Dautria JM, Liotard JM, Cabanes N, Girod M, Briqueu L (1987) Amphibole-rich xenoliths and host alkali basalts: petrogenetic constraints and implications on the recent evolution of the upper mantle beneath Ahaggar (Central Sahara, Southern Algeria). Contrib Mineral Petrol 95: 133-144
35. Dick HJB, Bullen T (1984) Chromian spinel as a petrogenetic indicator in abyssal and alpine type peridotites and spatially associated lavas. Contrib Mineral Petrol 86: 54-76
36. Dosso L, Bougault H, Joron JL (1993) Geochemical morphology of the North Mid-Atlantic ridge, 10-24° N: trace element-isotope complementarity. Earth Planet Sci Lett 120: 443-462
37. Dupuy C, Dostal J (1984) Trace element geochemistry of some continental tholeiites. Earth Planet Sci Lett 67: 61-69
38. Ellam RM (1992) Lithospheric thickness as a control on basalt geochemistry. Geology 20: 153-156
39. Essaifi A, Capdevila R, Lagarde JL (1995) Transformation de leucogabbros en chloritoschistes sous l'effet de l'altération hydrothermale et de la déformation dans l'intrusion de Kettara (Jebilet, Maroc). CR Acad Sci Paris, 320, IIa: 189-196
40. Evans CA, Girardeau J (1988) Galicia margin peridotites: undepleted abyssal peridotites from the North Atlantic. Proc Ocean Drill Program Sci Results 103: 195-207
41. 39Ar ages for the alkaline volcanism and basement of the Gorringe Bank, North Atlantic Ocean. Earth Planet Sci Lett 57: 211-226
42. 39Ar dating of the basement and alkaline volcanism of the Gorringe Bank (Atlantic Ocean). Earth Planet Sci Lett 79: 255-269
43. 39Ar de la mise en place des péridotites bordant la marge de Galice (Espagne). CR Acad Sci Paris II, 307: 49-55
44. 39Ar dating of gabbros from the ocean/ continent transition of the West Iberia margin: preliminary results. Proc Ocean Drill Program Sci Results 149: 489-495
45. Frost BR (1991) Stability of oxide minerals in metamorphic rocks. In: Lindsley DH (ed) Oxides minerals, petrologic and magnetic significance. Min Soc Am, Paul H Ribbe Ser, 25: 469-487
46. Fram MS, Lesher CE, Volpe AM (1998) Mantle melting, systematics: transition from continental to oceanic volcanism on the southeast Greenland margin. Proc Ocean Drill Program Sci Results 152: 373-386
47. Froitzheim N, Manatschal G (1996) Kinematics of Jurassic rifting, mantle exhumation, and passive margin formation in the Austroalpine and Penninic nappes (eastern Switzerland). Geol Soc Am Bull 108, 9: 1120-1133
48. Gavasci AT, Fox PJ, Ryan WBF (1973) Petrography of rocks from the crestal area of the Gorringe Bank. Proc Deep Sea Drill Program Initial Rep 13: 749-752
49. Girardeau J, Evans CA, Beslier M-O (1988) Structural analysis of plagioclase-bearing peridotites emplaced at the end of continental rifting: Hole 637A, ODP Leg 103 on the Galicia Margin. Proc Ocean Drill Program Sci Results 103: 209-223
50. Girardeau J, Cornen G, Agrinier P, Beslier M-O, Dubuisson G, Le Gall B, Monnier C, Pinheiro L, Ribeiro A, Whitechurch H (1998) Premiers résultats des plongées du Nautile sur le banc de Gorringe (Ouest Portugal). CR Acad Sci Paris 326: 247-254
51. Hébert R, Constantin M, Robinson PT (1991) Primary mineralogy of Leg 118 gabbroic rocks and their place in the spectrum of oceanic mafic igneous rocks. Proc Ocean Drill Program Sci Results 118: 3-20
52. Helmstaedt H, Allen JM (1977) Metagabbronorite from DSDP Hole 334: an example of high-temperature deformation and recrystallization near the Mid-Atlantic Ridge. Can J Earth Sci 14: 886-898
53. Holland T, Blundy J (1994) Non-ideal interactions in calcic amphiboles and their bearing on amphibole-plagioclase thermometry. Contrib Mineral Petrol 116: 453-447
54. Honnorez J, Fox PJ (1973) Petrography of the Gorringe Bank 'basement'. Proc Deep Sea Drill Program Initial Rep 13: 747-749
55. Honnorez J, Mével C, Montigny R (1984) Geotectonic significance of gneissic amphibolites from the Vema fracture Zone, Equatorial Mid-Atlantic Ridge. J Geophys Res 89: 11,379-11,400
56. Ionov DA, Hofmann AW (1995) Nb-Ta-rich mantle amphiboles and micas: implications for subduction-related metasomatic trace element fractionations. Earth Planet Sci Lett 131: 341-356
57. Irving AJ, Frey FA (1984) Trace element abundances in megacrysts and their host basalts: constraints on partition coefficients and megacryst genesis. Geochim Cosmochim Acta 48: 1201-1221
58. Ito E, Anderson AT Jr (1983) Submarine metamorphism of gabbros from the Mid-Cayman Rise: petrographic and mineralogic constraints on hydrothermal processes at slow-spreading ridges. Contrib Mineral Petrol 82: 371-388
59. Kornprobst J, Tabit A (1988) Plagioclase bearing ultramafic tectonites from the Galicia margin (Leg 103 Site 637): comparison of their origin and evolution with low-pressure ultramafic bodies in Western Europe. Proc Ocean Drill Program Sci Results 103: 253-268
60. Kornprobst J, Vidal P, Malod J (1988) Les basaltes de la marge de Galice (NO de la Péninsule Ibérique): hétérogénéité des spectres de terres rares à la transition continent/ océan. Données géochimiques préliminaires. CR Acad Sci fr 306, II: 1359-1364
61. Lécuyer C, Brouxel M, Lapierre H (1991) Petrogenesis of magmas at a fossil slow-spreading center: the Trinity ophiolite (northern California, USA). Bull Soc Geol fr 162: 795-809
62. Louden KE, Sibuet JC, Harmegnies F (1997) Variations in heat flow across the ocean-continent transition in the Iberia abyssal plain.Earth Planet Sci Lett 151: 233-254
63. Mével C (1984) Le métamorphisme dans la croûte océanique: apport de la pétrologie à la compréhension des phénomènes de circulation hydrothermale et de déformation. Université P et M Curie, Paris, 434pp
64. Mével C (1988) Metamorphism in oceanic layer 3, Gorringe Bank, Eastern Atlantic. Contrib Mineral Petrol 100: 496-509
65. Montigny R (1975) Géochimie comparée des roches océaniques et ophiolitiques. Problèmes de leur genèse. Univ Paris 6 and 7, Paris, 288pp
66. ODP Leg 149 Shipboard Scientific party (1994) Sites 897, 899, 900. Proc Ocean Drill Program Initial Rep 149: 41-268
67. ODP Leg 152 Shipboard Scientific party (1994) Site 917. Proc Ocean Drill Program Initial Rep 152: 107-158
68. ODP Leg 163 Shipboard Scientific party (1996) Site 988. Proc Ocean Drill Program Initial Rep 163: 23-30
69. Olivet J-L (1996) La cinématique de la plaque Ibérique. Bull Centres Rech Explor Prod Elf Aquitaine 20: 131-195
70. Papezik VS, Hodych JP (1980) Early Mesozoic diabase dikes of the Avalon Peninsula, Newfoundland: petrochemistry, mineralogy and origin. Can J Earth Sci 17: 1417-1430
71. Pedersen RB, Malpas J (1984) The origin of oceanic plagiogranites from the Karmoy ophiolite, Western Norway. Contrib Mineral Petrol 88: 36-52
72. Petrini R, Joron JL, Ottonello G, Bonatti E, Seyler M (1988) Basaltic dykes from Zabargad island, Red Sea: petrology and geochemistry. Tectonophysics 150: 229-248
73. Piccardo GB, Messiga B, Vannucci R (1988a) The Zabargad peridotite-pyroxenite association: petrological constraints on its evolution. Tectonophysics 150: 209-227
74. Piccardo GB, Rampona E, Scambellori M (1988b) The Alpine evolution of the Erro-Tobbio peridotites (Voltri massif, Ligurian Alps); some field and petrographic constraints. Ofioliti 13: 169-174
75. Pickup SLB, Whitmarsh RB, Fowler CMR, Reston TJ (1996) Insight into the nature of the ocean-continent transition off West Iberia from a deep multichannel seismic reflection profile. Geology 24: 1070-1082
76. Prichard H, Cann JR (1982) Petrology and mineralogy of dredged gabbro from Gettysburg Bank, Eastern Atlantic. Contrib Mineral Petrol 79: 46-55
77. Prichard H, Mitchell JG (1979) K-Ar data for the age and evolution of Gettysburg Bank, North Atlantic Ocean. Earth Planet Sci Lett 44: 261-268
78. Remaïdi M (1993) Etude pétrologique et géochimique d'une association péridotites réfractaires-pyroxénites dans le massif de Ronda (Espagne). Thesis, Univ of Montpellier, France, 437pp
79. Rudnick R, Fountain DM (1995) Nature and composition of the continental crust; a lower crustal perspective. Geophys Rev 33: 267-309
80. Schärer U, Kornprobst J, Beslier M-O, Boillot G, Girardeau J (1995) Gabbro and related rock emplacement beneath rifting continental crust: U-Pb geochronological and geochemical constraints for the Galicia passive margin (Spain). Earth Planet Sci Lett 130: 187-200
81. Schmidt MW (1992) Amphibole composition in tonalite as a fonction of pressure: an experimental calibration of the Al-in-hornblende barometer. Contrib Mineral Petrol 110: 304-310
82. 39Ar dating and geochemistry of tholeiitic magmatism related to the early opening of the Central Atlantic rift. Earth Planet Sci Lett 104: 455-472
83. Seifert K, Brunotte D (1996) Geochemistry of serpentinized mantle peridotite from Site 897 in the Iberia Abyssal Plain. Proc Ocean Drill Program Sci Results 149: 413-424
84. Seifert K, Gibson I, Weis D, Brunotte D (1996) Geochemistry of metamorphosed cumulate gabbros from Hole 900A, Iberia Abyssal Plain. Proc Ocean Drill Program Sci Results 149: 471-485
85. Serri G, Hébert R, Hékinian R (1988) Petrology of a plagioclase-bearing olivine websterite from Gorringe Bank (northeastern Atlantic Ocean). Can J Earth Sci 25: 557-569
86. VI in clinopyroxenes of subcontinental and suboceanic ridge peridotites: a clue to different melting processes in the mantle? Earth Planet Sci Lett 122: 281-289
87. Sun S-s, McDonough WF (1989) Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. In: Saunders AD, Norry MJ (eds) Magmatism in the ocean basins. Geol Soc Sp Pub 42: 313-342
88. Sweeney RJ, Thompson AB Ulmer P (1993) Phase relations of a natural MARID composition and implications for MARID genesis, lithospheric melting and mantle metasomatism. Contrib Mineral Petrol 115: 225-241
89. Tarney J, Saunders AD, Weaver SD, Donnellan NCB, Hendry GL (1978) Minor element geochemistry of basalts from Leg 49, North Atlantic Ocean. Proc Deep Sea Drill Program Initial Rep 49: 657-691
90. Tiezzi LJ, Scott RB (1980) Crystal fractionation in a cumulate gabbro, Mid Atlantic ridge, 26° N. J Geophys Res 85: 5438-5454
91. Tribuzio R, Messiga B, Vannucci R, Bottazzi P (1996) Rare earth element redistribution during high-pressure-low-temperature metamorphism in ophiolitic Fe-gabbros (Liguria, northwestern Italy): implications for light REE mobility in subduction zones. Geology 24: 711-714
92. Weaver BL, Tarney J, Saunders AD (1985) Geochemistry and mineralogy of basalts recovered from the Central North Atlantic. Proc ODP Init Repts 82: 395-419
93. White WM, Hofmann AW (1982) Sr and Nd isotope geochemistry of oceanic basalts and mantle evolution. Nature 296: 821-825
94. Whitmarsh RB, Miles PR, Mauffret A (1990) The ocean-continent boundary off the western continental margin of Iberia I Crustal structure at 40°30° N. Geophys J Intern 103: 509-531
95. Whitmarsh RB, Pinheiro LM, Miles PR, Recq M, Sibuet J-C (1993) Thin crust at the western Iberia ocean-continent transition and ophiolites. Tectonics 12: 1230-1239
96. Whitmarsh RB, Sawyer DS, Klaus A et al. (1996) Proc ODP Init Repts 149, 403pp
97. Whitmarsh RB, Beslier M-O, Wallace PJ et al. (1998) Proc ODP Init Repts 173, 403pp
98. Whitney PR (1972) Spinel inclusions in plagioclase of metagabbros from Adirondack Highlands. Am Mineral 57: 1429-1436