Magma chambers in the oman ophiolite: Fed from the top and the bottom

Earth and Planetary Science Letters

Volumn 144, Issue 1-2, 1996, Pages 239-250

  Boudier, Françoise ^a   Nicolas, Adolphe ^a   Ildefonse, Benoît ^a  

^a CNRS   (France)

Author keywords

Gabbros; Magma chambers; Oman; Semail ophiolite; Spreading centers

Indexed keywords

GABBRO; MAGMA CHAMBER; MID OCEAN RIDGE; OPHIOLITE; SILL;

OMAN;

EID: 0030436652     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/0012-821x(96)00167-7     Document Type: Article

References (38)

1. J.M. Sinton and R.S. Detrick, Mid-ocean ridge magma chambers, J. Geophys. Res. 97, 197-216, 1992.
2. J. Phipps Morgan, A. Harding, J. Orcutt, Kent and Y.J. Chen, An observational and theoretical synthesis of magma chamber geometry and crustal genesis along a Mid-ocean Ridge Spreading Center, in: Magmatic Systems, M.P. Ryan, ed., pp. 139-178, Academic Press, San Diego, 1994.
3. A. Nicolas, F. Boudier and B. Ildefonse, Evidence from the Oman ophiolite for active mantle upwelling beneath a fast-spreading ridge, Nature 370, 51-53, 1994.
4. A. Nicolas and F. Boudier, Mapping oceanic ridge segments in Oman ophiolites, J. Geophys. Res. 100, 6179-6197, 1995.
5. T.J. Henstock, A.W. Woods and R.S. White, The accretion of oceanic crust by episodic sill intrusion, J. Geophys. Res. 98, 4143-4161, 1993.
6. J.E. Quick and R.P. Denlinger, Ductile deformation and the origin of layered gabbro in ophiolites, J. Geophys. Res. 98, 14015-14027, 1993.
7. J. Phipps Morgan and Y.J. Chen, The genesis of oceanic crust: magma injection, hydrothermal circulation and crustal flow, J. Geophys. Res. 98, 6283-6297, 1993.
8. A. Nicolas, C.L. Freydier, M. Godard and A. Vauchez, Magma chambers at oceanic ridges: how large?, Geology 21, 53-56, 1993.
9. A. Nicolas, F. Boudier and B. Ildefonse, Variable Moho depth in the Oman ophiolite - Implication for oceanic ridges, J. Geophys. Res., in press.
10. K. Benn, A. Nicolas and I. Reuber, Mantle-crust transition zone and origin of wehrlitic magmas: evidence from the Oman ophiolite, Tectonophysics 151, 75-85, 1988.
11. J.H. Bédard, Oceanic crust as a reactive filter: Synkinematic intrusion, hybridization, and assimilation in an ophiolitic magma chamber, western Newfoundland, Geology 21, 77-80, 1993.
12. F. Boudier and A. Nicolas, Nature of the Moho transition zone in the Oman ophiolite, J. Petrol. 36, 777-796, 1995.
13. J.S. Pallister and C.A. Hopson, Samail ophiolite plutonic suite: field relations, phase variation, cryptic variation and layering, and a model of a spreading ridge magma chamber, J. Geophys. Res. 86, 2593-2644, 1981.
14. J.D. Smewing, Mixing characteristics and compositional differences in mantle-derived melts beneath spreading axes: evidence from cyclically layered rocks in the ophiolite of North Oman, J. Geophys. Res. 86, 2645-2660, 1981.
15. J.S. Pallister, Parent magmas of the Semail ophiolite, Oman, in: Ophiolites and Oceanic Lithosphere, I.G. Gass, S.J. Lippard and A.W. Shelton, eds., Geol. Soc. London. Spec. Publ. 13, 63-70, 1984.
16. P. Browning, Cryptic variation within the cumulate sequence of the Oman ophiolite: magma chamber depth and petrological implications, in: Ophiolites and Oceanic Lithosphere, I.G. Gass, S.J. Lippard and A.W. Shelton, eds., Geol. Soc. London. Spec. Publ. 13, 71-82, 1984.
17. A. Nicolas, I. Reuber and K. Benn, A new magma chamber model based on structural studies in the Oman ophiolite, Tectonophysics 151, 87-105, 1988.
18. A. Nicolas, Kinematics in magmatic rocks with special reference to gabbros, J. Petrol. 33, 891-915, 1992.
19. T. Juteau, M. Ernewein, I. Reuber, H. Whitechurch and R. Dahl, Duality of magmatism in the plutonic sequence of the Sumail nappe, Oman, Tectonophysics 151, 107-135, 1988.
20. K. Benn and B. Allard, Preferred mineral orientations related to magmatic flow in ophiolite layered gabbros, J. Petrol. 30, 925-946, 1989.
21. C.J. MacLeod and D.A. Rothery, Ridge axial segmentation in the Oman ophiolite: evidence from along-strike variations in the sheeted dyke complex, in: Ophiolites and their Modern Oceanic Analogues, L.M. Parson, B.J. Murton and P. Browning, eds., Geol. Soc. London. Spec. Publ. 60, 39-63, 1992.
22. A. Nicolas and B. Ildefonse, Flow mechanism and viscosity in basaltic magma chambers, Geophys. Res. Lett., in press.
23. D. Mainprice and P.G. Silver, Interpretation of SKS-waves using samples from the subcontinental lithosphere, Phys. Earth Planet. Inter. 78, 257-280, 1993.
24. J.P. Poirier and A. Nicolas, Deformation-induced recrystallization by progressive misorientation of subgrain-boundaries, with special reference to mantle peridotites, J. Geol. 83, 707-720, 1975.
25. L.R. Wager and G.M. Brown, Layered Igneous Rocks, 558 pp., Oliver and Boyd, Edinburgh, 1968.
26. A.R. McBirney and R.M. Noyes, Crystallization and layering of the Skaergard intrusion, J. Petrol. 20, 487-554, 1979.
27. G. Brandeis and C. Jaupart, On the interaction between convection and crystallization in cooling magma chambers, Earth Planet. Sci. Lett., 77, 345-361, 1986.
28. T.N. Irvine, Layering and related structures in the Duke Island and Skaergard intrusions: similarities, differences and origins. In: Origin of Igneous Layering, I. Parson, ed., NATO ASI Ser. C 196, 185-245, 1987.
29. C.J. MacLeod, F. Boudier, G. Yaouancq and C. Richter, Gabbro fabrics from site 894, Hess Deep: implications for magma chamber processes at the East Pacific Rise, Ocean Drill. Prog. Sci. Results 147, 1995.
30. 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 at accreting plate boundaries, J. Geophys. Res. 92, 12823-12836, 1987.
31. B. Ildefonse, F. Nicolas and F. Boudier, Evidence from the Oman ophiolite for sudden stress changes during melt injection at oceanic spreading centres, Nature 366, 673-675, 1993.
32. A. Nicolas, F. Boudier and B. Ildefonse, Dike patterns in diapirs beneath oceanic ridges: the Oman ophiolite, in: Magmatic Systems, M.P. Ryan, ed., pp. 77-95, Academic Press, Orlando, Fla., 1994.
33. A. Gudmundson, Infrastructure and mechanics of volcanic systems in Iceland, J. Volcanol. Geotherm. Res. 64, 1-22, 1995.
34. P.B. Kelemen, K. Koga and N. Shimizu, Geochemistry of gabbro sills in the crust/mantle transition zone of the Oman ophiolite: Implications for the origin of the oceanic lower crust, submitted.
35. A. Nicolas, Melt extraction from mantle peridotites: hydrofracturing or porous flow consequence on oceanic ridge activity. In: Magma Transport and Storage, M.P. Ryan, ed., pp. 160-174, Wiley, Chichester, 1990.
36. J. Garmany, Accumulations of melt at the base of young oceanic crust, Nature 340, 628-632, 1989.
37. J. Garmany, Y. Nakamura and Y. Hello, Widespread occurence of melt intrusions at the base of young ocean crust near 9°30'N on the East Pacific Rise, EOS Trans. Am. Geophys. Union 74, 660, 1993.
38. G.A. Barth and J.C. Mutter, Variability in oceanic crustal thickness and structure: Multichannel seismic reflexion results from the northern East Pacific Rise, J. Geophys. Res., in press.