Regional-scale melt-rock interaction in lherzolitic mantle in the Romanche Fracture Zone ( Atlantic Ocean)

Earth and Planetary Science Letters

Volumn 146, Issue 1-2, 1997, Pages 273-287

  Seyler, Monique ^a   Bonatti, Enrico ^b,c  

^a CNRS   (France)

^b CNR   (Italy)

^c Department of Earth and Environmental Sciences   (United States)

Author keywords

Geochemistry; Magmas; Melting; Peridotite; Romanche fracture zone

Indexed keywords

IGNEOUS GEOCHEMISTRY; LHERZOLITE; MANTLE PROCESSES; MELTING; PERIDOTITE;

ATLANTIC, ROMANCHE FRACTURE ZONE;

EID: 0030748225     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/s0012-821x(96)00220-8     Document Type: Article

References (44)

1. H.J.B. Dick, Abyssal peridotites, very slow spreading ridges and ocean ridge magmatism, in: Magmatism in the Ocean Basins, A.D. Saunders and M.J. Morris, eds,. Geol. Soc. London Spec. Publ. 42, 71-105, 1989.
2. M. Cannat and M. Seyler, Transform tectonics, metamorphic plagioclase and amphibolitization in ultramafic rocks of the Vema transform fault (Atlantic Ocean), Earth Planet. Sci. Lett. 133, 283-298, 1995.
3. M. Cannat, D. Bideau and R. Hébert, Plastic deformation and magmatic impregnation in serpentinized ultramafic rocks from the Garett Transform Fault (East Pacific Rise), Earth Planet. Sci. Lett. 101, 216-232, 1990.
4. P.R. Hamlyn and E. Bonatti, Petrology of mantle-derived ultramafics from the Owen Fracture Zone, northwest Indian Ocean: Implications for the nature of the oceanic upper mantle, Earth Planet. Sci. Lett. 48, 65-79, 1980.
5. E. Bonatti, M. Seyler and N. Sushevskaya, A cold suboceanic mantle belt at the Earth's equator, Science 261, 315-320, 1994.
6. E. Bonatti, A. Peyve, P. Kepezhinskas, N. Kurentsova, M. Seyler, S. Skolotnev and G. Udintsev, Upper mantle heterogeneity below the Mid-Atlantic Ridge, 0-15 N, J. Geophys. Res. 97, 4461-4476, 1992.
7. F. Boudier and A. Nicolas, Harzburgite and Iherzolite subtypes in ophiolitic and oceanic environments, Earth Planet. Sci. Lett. 76, 84-92, 1986.
8. E. Bonatti, G. Ottonello and P.R. Hamlyn, Peridotites from the island of Zabargad (St. John), Red Sea: Petrology and geochemistry, J. Geophys. Res. 91, 385-401, 1986.
9. H. Downes, Shear zones in the upper mantle - Relation between geochemical enrichment and deformation in mantle peridotites, Geology 18, 374-377, 1990.
10. Y.S. Zhang and T. Tanimoto, Ridges, hotspots and their interaction as observed in seismic velocity maps. Nature 355, 45-49, 1992.
11. Y.S. Zhang and T. Tanimoto, High-resolution global upper mantle structure and plate tectonics, J. Geophys. Res. 98, 9793-9824, 1993.
12. J.G. Schilling, A.N. Davis, D. Fontagnie and B. McCully, Equatorial MAR segmentation from 3°5 to 5°N: petrological and geochemical relationships, EOS Trans. AGU 71, 624, 1990.
13. H.J.B. Dick and T.B. Bullen, Chromian spinel as a petrogenetic indicator in abyssal and alpine-type peridotites and spatially associated lavas, Contrib. Mineral. Petrol. 86, 54-76, 1984.
14. K.T.M. Johnson, H.J.B. Dick and N. Shimizu, Melting in the oceanic upper mantle: An ion microprobe study of diopsides in abyssal peridotites, J. Geophys. Res. 95, 2661-2678, 1990.
15. D. Elthon, Chemical trends in abyssal peridotites: refertilization of depleted suboceanic mantle, J. Geophys. Res. 97, 9015-9025, 1992.
16. N Shimizu, M.P. Semet and C.J. Allègre, Geochemical applications of quantitative ion-microprobe analysis, Geochim. Cosmochim. Acta 42, 1321-1334, 1978.
17. K.T.M. Johnson and H.J.B. Dick, Open system melting and temporal and spatial variation of peridotite and basalt at the Atlantis II Fracture Zone, J. Geophys. Res. 97, 9219-9241, 1992.
18. J.L. Bodinier, M.A. Menzies and M.F. Thirlwall, Continental to oceanic mantle transition - REE and Sr-Nd isotopic geochemistry of the Lanzo Iherzolite massif, in: Orogenic Lherzolites and Mantle Processes, J. Petrol. Spec. Issue, 191-210, 1991.
19. E. Takazawa, F.A. Frey, N. Shimizu, M. Obata and J.L. Bodinier, Geochemical evidence for melt migration and reaction in the upper mantle, Nature 359, 55-58, 1992.
20. J.L. Bodinier, G. Vasseur, J. Verrieres, C. Dupuy and J. Fabries, Mechanisms of mantle metasomatism: Geochemical evidence from the Lherz orogenic peridotite, J. Petrol. 31, 597-628, 1990.
21. O. Navon and E. Stolper, Geochemical consequences of melt percolation: The upper mantle as a chromotographic column, J. Geol. 95, 285-307, 1987.
22. P.B. Kelemen, N. Shimizu and V.J.M. Salters, Extraction of mid-ocean ridge basalt from the upwelling mantle by focused flow of melt in dunite channels, Nature 375, 747-753, 1995.
23. P.B. Kelemen, Reaction between ultramafic rock and fractionating basaltic magma I. Phase relations, the origin of calc-alkaline magma series, and the formation of discordant dunite, J. Petrol. 31, 51-98, 1990.
24. P.B. Kelemen, D.B. Joyce, J.D. Webster and J.R. Holloway, Reaction between ultramafic rock and fractionating basaltic magma II. Experimental investigation of reaction between olivine tholeiite and harzburgite at 1150-1050°C and 5 kb, J. Petrol. 31,99-134, 1990.
25. A. Nicolas, Structures of Ophiolites and Dynamics of Oceanic Lithosphere, 367 pp., Kluwer, Dordrecht, 1989.
26. P.B. Kelemen, H.J.B. Dick and J.E. Quick, Formation of harzburgite by pervasive melt/rock reaction in the upper mantle, Nature 358, 635-641, 1992.
27. P.B. Kelemen, J.A. Whitehead, E. Aharonov and K. Jordahl, Experiments on flow focusing in soluble porous media, with applications to melt extraction from the mantle, J. Geophys. Res. 100, 475-496, 1995.
28. D. Van der Wal and J.L. Bodinier, Origin of the recrystallization front in the Ronda peridotite by km-scale pervasive porous melt flow, Contrib. Mineral. Petrol. 122, 387-405, 1996.
29. H. Sirgudsson and J.G. Schilling, Spinels in Mid-Atlantic Ridge basalts: chemistry and occurrence, Earth Planet. Sci. Lett. 29, 7-20, 1976.
30. S. Arai, Compositional variation of olivine-chromian spinel in Mg-rich magmas as a guide to their residual spinel peridotites, J. Volcanol. Geotherm. Res. 59, 279-293, 1994.
31. R.J. Kinzler and T.L. Grove, Primary magmas of mid-ocean ridge basalts 2. Applications, J. Geophys. Res. 97, 6907-6926, 1992.
32. K. Hirose and I. Kushiro, Partial melting of dry peridotites at high pressures: Determination of compositions of melts segregated from peridotite using aggregates of diamond, Earth Planet. Sci. Lett. 114, 477-489, 1993.
33. M.B. Baker and E.M. Stolper, Determining the composition of high-pressure mantle melts using diamond aggregates, Geochim. Cosmochim. Acta 58, 2811-2827, 1994.
34. A. Nicolas, Melt extraction model based on structural studies in mantle peridotites, J. Petrol. 27, 999-1022, 1986.
35. G. Ceuleneer and M. Rabinowicz, Mantle flow and melt migration beneath oceanic reidges: Models derived from observations in ophiolites, AGU Geophys. Monogr. 71, 123-154, 1992.
36. A. Nicolas and A. Prinzhofer, Cumulative or residual origin for the transition zone in ophiolites: Structural evidence, J. Petrol. 24, 188-206, 1983.
37. P. Tapponnier and J. Francheteau, Necking of the lithosphere and the mechanics of slowly accreting plate boundaries, J. Geophys. Res. 83, 3955-3970, 1978.
38. J. Phipps-Morgan, E.M. Parmentier and J. Lin, Mechanisms for the origin of mid-ocean ridge axial topography: Implications for the thermal and mechanical structure of accreting plate boundaries, J. Geophys. Res. 92, 12,823-12,836, 1987.
39. P.R. Shaw and J. Lin, Causes and consequences of variations in faulting style at the Mid-Atlantic Ridge, J. Geophys. Res. 98, 21,839-21,852, 1993.
40. J. Phipps Morgan and D.W. Forsyth, Three-dimensional flow and temperature pertubations due to a transform offset: effects on oceanic crustal and upper mantle structure, J. Geophys. Res. 93, 2955-2966, 1988.
41. P.J. Fox and D.G. Gallo, A tectonic model for ridge-transform-ridge-plate boundaries: Implications for the structure of oceanic lithosphere, Tectonophysics 104, 205-242, 1984.
42. I. Ghose, M. Cannat and M. Seyler, Transform fault effect on mantle melting in the MARK area (Mid-Atlantic Ridge south of the Kane Transform), Geology, submitted, 1996.
43. A. Toramaru and N. Fujii, Connectivity of melt phase in a partially molten peridotite, J. Geophys. Res. 91, 9239-9252, 1986.
44. N. Van Bargen and H.S. Waff, Wetting of enstatite by basaltic melt at 1350°C and 1-25 GPa pressure, J. Geophys. Res. 93, 1153-1158, 1988.