Geology and petrology of the plutonic complexes in the Wadi Fizh area: Multiple magmatic events and segment structure in the northern Oman ophiolite

Geochemistry, Geophysics, Geosystems

Volumn 4, Issue 9, 2003, Pages

  Adachi, Yoshiko ^a   Miyashita, Sumio ^a  

^a NIIGATA UNIVERSITY   (Japan)

Author keywords

Late intrusive; Multiple magmatic events; Oman; Ophiolite; Segmentation; Wehrlite

Indexed keywords

EID: 33750336469     PISSN: 15252027     EISSN: 15252027     Source Type: Journal    
DOI: 10.1029/2001GC000272     Document Type: Article

References (74)

1. Alabaster, T., J. A. Pearce, and J. Malpas, The volcanic stratigraphy and petrogenesis of the Oman ophiolite complex, Contrib. Mineral. Petrol., 81, 168-183, 1982.
2. Beard, J. S., Characteristic mineralogy of arc-related cumulate gabbros: Implications for the tectonic setting of gabbroic plutons and for andesite genesis, Geology, 14, 848-851, 1986.
3. Bédard, J. H., and R. Hébert, The lower crust of the Bay of Islands ophiolite, Canada: Petrology, mineralogy, and the importance of syntexis in magmatic differentiation in ophiolites and at ocean ridges, J. Geophys. Res., 101, 25,105-25,124, 1996.
4. Benn, K., A. Nicolas, and I. Reuber, Mantle-crust transition zone and origin of wehrlitic magmas: Evidence from the Oman ophiolite, Tectonophysics, 151, 75-85, 1988.
5. Benoit, M., G. Ceuleneer, and M. Polve, The remelting of hydrothermally altered peridotite at mid-ocean ridges by intruding mantle diapirs, Nature, 402, 514-518, 1999.
6. Boudier, F., G. Ceuleneer, and A. Nicolas, Shear zones, thrusts and related magmatism in the Oman ophiolite: Initiation of thrusting on an oceanic ridge, Tectonophysics, 151, 275-296, 1988.
7. Boudier, F., A. Nicolas, and B. Ildefonse, Magma chambers in the Oman ophiolite: Fed from the top and the bottom, Earth Planet. Sci. Lett., 144, 239-250, 1996.
8. Boudier, F., M. Godard, and C. Armbruster, Significance of gabbronorite occurrence in the crustal section of the Semail ophiolite, Mar. Geophys. Res., 21, 307-326, 2000.
9. Browning, P., Cryptic variation within the cumulate sequence of the Oman ophiolite: Magma chamber depth and petrological implications, in Ophiolites and Oceanic Lithosphere, edited by I. G. Gass, S. J. Lippard, and A. W. Shelton, Geol. Soc. Spec. Publ., 13, 71-82, 1984.
10. Buck, W. R., Can downward flow of dense cumulate slurry through mushy upper gabbros produce lower gabbros at a fast-spreading center?, in Ophiolites and Oceanic Crust: New Insights from Field Studies and the Ocean Drilling Program, edited by Y. Dilek et al., Spec. Pap. Geol. Soc. Am., 349, 121-127, 2000.
11. Coogan, L. A., G. Thompson, and C. J. MacLeod, A textural and geochemical investigation of high level gabbros from the Oman ophiolite: Implications for the role of the axial magma chamber at fast-spreading ridges, Lithos, 63, 67-82, 2002a.
12. Coogan, L. A., G. R. T. Jenkin, and R. N. Wilson, Constraining the cooling rate of the lower oceanic crust: A new approach applied to the Oman ophiolite, Earth Planet. Sci. Lett., 199, 127-146, 2002b.
13. Einaude, F., P. Pezard, J. J. Cocheme, C. Coulon, L. Laverne, and M. Godard, Petrography, geochemistry and physical properties of continuous extrusive section from the Sarami Massif, Semail ophiolite, Mar. Geophys. Res., 21, 387-407, 2000.
14. Ernewein, M., C. Pflumio, and H. Whitechurch, The death of an accretion zone as evidenced by the magmatic history of the sumail ophiolite (Oman), Tectonophysics, 151, 247-274, 1988.
15. Gillis, K. M., and L. A. Coogan, Anatectic migmatites from the roof of an ocean ridge magma chamber, J. Petrol., 43, 2075-2095, 2002.
16. Gillis, K. M., and M. D. Roberts, Cracking at the magmahydrothermal transition: Evidence from the Troodos Ophiolite, Cyprus, Earth Planet. Sci. Lett., 169, 227-244, 1999.
17. Glennie, K. W., M. G. A. Beouf, M. W. Hughes Clark, M. Moody-Stuart, W. F. H. Pilaar, and B. M. Reinhardt, The Geology of the Oman Mountains, Verdh. Konin. Nederlands Geol. Mijnbouw. Genoot., vol.31, 423 pp., R. Geol. and Min. Soc. of the Netherlands, Utrecht, Netherlands, 1974.
18. Gomez, O., and A. Briais, Near-axis seamount distribution and its relationship with the segmentation of the East Pacific Rise and northern Pacific-Antarctic Ridge, 17°N-56°S, Earth Planet. Sci. Lett., 175, 233-246, 2000.
19. Hacker, B. R., Rapid emplacement of young oceanic lithosphere: Argon geochronology of the Oman ophiolite, Science, 265, 1563-1565, 1994.
20. Imai, N., S. Terashima, S. Itoh, and A. Ando, 1994 compilation values for GSJ reference samples, "Igneous series," Geochem. J., 19, 91-95, 1995.
21. Irvine, T. N., J. C. Andersen, and C. K. Brooks, Included blocks (and blocks within blocks) in the Skaergaard intrusion: Geologic relations and the origins of rhythmic modally graded layers, Geol. Soc. Am. Bull., 110, 1398-1447, 1998.
22. Ishikawa, T., K. Nagaishi, and S. Umino, Boninitic volcanism in the Oman ophiolite: Implications for thermal condition during transition from spreading ridge to arc, Geology, 30, 899-902, 2002.
23. Ishiwatari, A., Petrology, geochemistry, and mineralogy of the Early Cretaceous evolved N-MORB from Sites 765 and 766, eastern Indian Ocean, Gradstein, Proc. Ocean Drill. Program Sci. Results, 123, 201-213, 1992.
24. Jousselin, D., and A. Nicolas, The Moho transition zone in the Oman ophiolite-relation with wehrlites in the crust and dunites in the mantle, Mar. Geophys. Res., 21, 229-241, 2000a.
25. Jousselin, D., and A. Nicolas, Oceanic ridge off-axis deep structure in the Mansah region (Sumail massif, Oman ophiolite), Mar. Geophys. Res., 21, 243-257, 2000b.
26. Juteau, T., and R. Maury, The Oceanic Crust, From Accretion to Mantle Recycling, 390 pp., Springer-Verlag, New York, 1999.
27. Juteau, T., M. Ernewein, I. Reuber, H. Whitechurch, and R. Dahl, Duality of magmatism in the plutonic sequence of the Sumail Nappe, Oman, Tectonophysics, 151, 106-135, 1988a.
28. Juteau, T., M. Beurrier, R. Dahl, and P. Nehlig, Segmentation at a fossil spreading axis: The plutonic sequence of the Wadi Haymiliyah area (Haylayn block, Sumail Nappe, Oman), Tectonophysics, 151, 167-197, 1988b.
29. Kelemen, P., and E. Aharonov, Periodic formation of magma fractures and generation of layered gabbros in the lower crust beneath oceanic spreading ridges, in Faulting and Magmatism at Mid-Ocean Ridges, Geophys. Monogr. Ser., vol.106, edited by R. W. Buck et al., pp. 267-289, AGU, Washington, D. C., 1998.
30. Kelemen, P. B., 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, Earth Planet. Sci. Lett., 146, 475-488, 1997.
31. Koga, K. T., P. B. Kelemen, and N. Shimizu, Petrogenesis of the crust-mantle transition zone (MTZ) and the origin of lower crustal wehrlite in the Oman ophiolite, Geochem. Geophys. Geosyst., 1, Paper number 2000GC000132, 2001.
32. Lachize, M., J. P. Lorand, and T. Juteau, Calk-alkaline differentiation trend in the plutonic sequence of the Wadi Haymiliyah section, Haylayn massif, Semail ophiolite, Oman, Lithos, 38, 207-232, 1996.
33. Lippard, S. J., A. W. Shelton, and I. G. Gass, The Ophiolite of Northern Oman, Mem. Geol. Soc. London, vol.11, 178 pp., Blackwell Sci., Malden, Mass., 1986.
34. Macdonald, K. C., D. S. Scheirer, and S. M. Carbotte, Midocean ridges: Discontinuities, segments and giant cracks, Science, 253, 986-994, 1991.
35. MacLeod, C. J., 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, edited by L. M. Parson, B. J. Murton, and P. Browning, Geol. Soc. Spec. Publ., 60, 39-63, 1992.
36. MacLeod, C. J., and G. Yaouancq, A fossil melt lens in the Oman ophiolite: Implications for magma chamber processes at fast spreading ridges, Earth Planet. Sci. Lett., 176, 357-373, 2000.
37. Ministry of Petroleum and Minerals, Geological map of Wadi Bani Umar, sheet NG40-14E-II, Muscat, Sultanate of Oman, 1987.
38. Miyashita, S., Y. Adachi, and S. Umino, Along-axis magmatic system in the northern Oman ophiolite: Implications of compositional variation of the sheeted dike complex, Geochem. Geophys. Geosyst., 4, doi:10.1029/2001GC000235, in press, 2003.
39. Nehling, P., and T. Juteau, Flow porosities, permeabilities and preliminary data on fluid inclusions and fossil thermal gradients in the crustal sequence of the Samail Ophiolite (Oman), Tectonophysics, 151, 199-221, 1988.
40. Nicolas, A., Structures of Ophiolites and Dynamics of Oceanic Lithosphere, 367 pp., Kluwer Acad., Norwell, Mass., 1989.
41. Nicolas, A., Kinematics in magmatic rocks in special reference to gabbros, J. Petrol., 33, 891-915, 1992.
42. Nicolas, A., and F. Boudier, Rooting of the sheeted dike complex in the Oman ophiolite, in Ophiolite Genesis and Evolution of the Oceanic Lithosphere, edited by T. Peters, A. Nicolas, and R. Colman, pp. 39-54, Kluwer Acad., Norwell, Mass., 1991.
43. Nicolas, A., G. Ceuleneer, F. Boudier, and M. Misseri, Structural mapping in the Oman ophiolites: Mantle diapirism along an ocean ridge, Tectonophysics, 151, 27-55, 1988.
44. Nicolas, A., F. Boudier, and B. Ildefonse, Variable crustal thickness in the Oman ophiolite: Implications for oceanic crust, J. Geophys. Res., 101, 17,941-17,950, 1996.
45. Nicolas, A., F. Boudier, B. Ildefonse, and E. Ball, Accretion of Oman and United Arab Emirates ophiolite-Discussion of a new structural map, Mar. Geophys. Res., 21, 147-180, 2000.
46. Niu, Y., and R. Batiza, Trace element evidence from seamounts for recycled oceanic crust in the Eastern Pacific mantle, Earth Planet. Sci. Lett., 148, 471-484, 1997.
47. Pallister, J. S., and C. Hopson, Samail ophiolite 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.
48. Pearce, J. A., Trace element characteristics of lavas from destructive plate boundaries, in Andesite: Orogenic Andesites and Related Rocks, edited by R. S. Thorpe, pp. 525-548, John Wiley, New York, 1982.
49. Pelumio, C., Evidence for polyphased oceanic alteration of the extrusive sequence of the Semail ophiolite from the Salahi block (Northern Oman), in Ophiolite Genesis and Evolution of the Oceanic Lithosphere, edited by T. Peters, A. Nicolas, and R. Colman, pp. 313 -351, Kluwer Acad., Norwell, Mass., 1991.
50. Perfit, M. R., and W. W. Chadwick Jr., Magmatism at midocean ridges: Constraints from volcanological and geochemical investigations, in Faulting and Magmatism atMid-Ocean Ridges, Geophys. Monogr. Ser., vol.106, edited by R. W. Buck et al., pp. 59-115, AGU, Washington, D. C., 1998.
51. Perfit, M. R., D. J. Fornari, M. C. Smith, J. F. Bender, C. H. Langmuir, and R. M. Haymon, Small-scale spatial and temporal variations in mid-ocean ridge crest magmatic processes, Geology, 22, 375-379, 1994.
52. Quick, J. E., and R. P. Denlinger, Ductile deformation and the origin of layered gabbro in ophiolites, J. Geophys. Res., 98, 14,015-14,028, 1993.
53. Reinhardt, B. M., On the genesis and emplacement of ophiolites in the Oman Mountains geosyncline, Schweiz. Min. Petrol. Mitt., 49, 1-39, 1969.
54. Reuber, I., Complexity of the crustal sequence in the northern Oman ophiolite (Fizh and southern Aswad blocks): The effect of early slicing?, Tectonophysics, 151, 137-165, 1988.
55. Reuber, I., Geometry and flow pattern of the plutonic sequence of the Salahi massif (northern Oman ophiolite)-A key to decipher successive magmatic events, in Ophiolite Genesis and Evolution of the Oceanic Lithosphere, edited by T. Peters, A. Nicolas, and R. Colman, pp. 83-103, Kluwer Acad., Norwell, Mass., 1991.
56. Reynolds, J. R., C. H. Langmuir, J. F. Bender, K. A. Kastens, and W. B. F. Ryan, Spatial and temporal variability in the geochemistry of basalts from the East Pacific Rise, Nature, 359, 493-499, 1992.
57. Rochette, P., L. Jenatton, C. Dupuy, F. Boudier, and I. Reuber, Diabase dikes emplacement in the Oman ophiolite: A magnetic fabric study with reference to geochemistry, in Ophiolite Genesis and Evolution of the Oceanic Lithosphere, edited by T. Peters, A. Nicolas, and R. Colman, pp. 82-88, Kluwer Acad., Norwell, Mass., 1991.
58. Ross, K., and D. Elthon, Cumulates from strongly depleted mid-ocean-ridge basalt, Nature, 365, 826-829, 1993.
59. Rothery, D. A., The base of a sheeted dyke complex, Oman ophiolite: Implications for magma chambers at oceanic spreading axes, J. Geol. Soc. London, 140, 287-296, 1983.
60. Schaaf, A., and V. Thomas, Les radiolaires campaniens du wadi Ragmi (nappe de Semail, Oman): Un nouveau reperè chronologique de l'obduction omanaise, C. R. Acad. Sci., Ser. II, 303, 1593-1598, 1986.
61. Scholz, C. H., The brittle-plastic transition and the depth of seismic faulting, Geol. Rundsch., 77, 319-328, 1988.
62. Searle, M., and J. Cox, Tectonic setting, origin, and obduction of theOmanophiolite, Geol. Soc. Am.Bull., 111, 104-122, 1999.
63. Shervais, J. W., Ti-V plots and the petrogenesis of modern and ophiolitic lavas, Earth Planet. Sci. Lett., 59, 101-118, 1982.
64. Smewing, J. D., An Upper Cretaceous ridge-transform intersection in the Oman ophiolite, in Ophiolites: Proceedings of the International Ophiolite Symposium, edited by A. Panayiotou, pp. 407-413, Geol. Surv. Dep., Nicosia, Cyprus, 1980.
65. Smewing, J. D., Mixing characteristics and compositional differences in the mantle-derived melts beneath spreading axes: Evidence from cyclically layered rocks in the ophiolite of North Oman, J. Geophys. Res., 86, 2645-2659, 1981.
66. Sun, S. S., and W. F. McDonough, Chemical and isotopic systematics of oceanic basalts: Implications for mantle composition and processes, in Magmatism in the Ocean Basins, edited by A. D. Saunders and M. J. Norry, Geol. Soc. Spec. Publ., 42, 313-345, 1989.
67. Takahashi, T., and K. Shuto, Major and trace element analyses of silicate rocks using X-ray fluorescence spectrometry RIX3000 (in Japanese), Rigaku-Denki J., 28, 25-37, 1997.
68. Thompson, G., Metamorphic and hydrothermal processes: Basalts-seawater interactions, in Oceanic Basalt, edited by P. A. Floyd, pp. 148-173, Blackie Acad. and Prof., New York, 1991.
69. Thy, P., Petrogenetic implications of mineral crystallization trends of Troodos cumulates, Cyprus, Geol. Mag., 124(1), 1-11, 1987.
70. Tilton, G. R., C. A. Hopson, and J. E. Wright, Uranium-lead isotopic ages of the Samail ophiolite, Oman, with applications to Tethyan ocean ridge tectonics, J. Geophys. Res., 86, 2763-2775, 1981.
71. Tippit, P. R., E. A. Pessagno Jr., and J. D. Smewing, The biostratigraphy of sediments in the volcanic unit of the Samail ophiolite, J. Geophys. Res., 86, 2756-2762, 1981.
72. Umino, S., S. Yanai, A. R. Jaman, Y. Nakamura, and J. T. Iiyama, The transition from spreading to subduction: Evidence from the Semail ophiolite, northern Oman mountains, in Ophiolites: Oceanic Crust Analogues, edited by J. Malpas et al., pp. 375-384, Geol. Surv. Dep., Minist. of Agric. and Nat. Resour., Nicosia, Cyprus, 1990.
73. Umino, S., S. Miyashita, F. Hotta, and Y. Adachi, Alongstrike variation of the sheeted dike complex in the Oman Ophiolite: Insights into subaxial ridge segment structures and the magma plumbing system, Geochem. Geophys. Geosyst., 4, doi:10.1029/2001GC000272, in press, 2003.
74. Wager, L. R., and G. M. Brown, Layered Igneous Rock, Oliver and Boyd, 588 pp., White Plains, N. Y., 1968.