Structure of modern oceanic crust and ophiolites and implications for faulting and magmatism at oceanic spreading centers

Geophysical Monograph Series

Volumn 106, Issue , 1998, Pages 219-265

  Dilek, Yildirim ^a   Moores, Eldridge M ^b   Fumes, Harald ^c  

^a MIAMI UNIVERSITY   (United States)

^b UNIVERSITY OF CALIFORNIA   (United States)

^c UNIVERSITY OF BERGEN   (Norway)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 85040248784     PISSN: 00658448     EISSN: 23288779     Source Type: Book Series    
DOI: 10.1029/GM106p0219     Document Type: Chapter

References (195)

1. Abbate, E., V. Bortolotti, and G. Principi, Apennine ophiolite: a peculiar oceanic crust, Ofioliti, 1, 59-96, 1980.
2. Adamson, A.C., Basement lithostratigraphy, Deep Sea Drilling Project Hole 504B, Init. Repts. DSDP, 83, 121-128, 1985.
3. Agar, S.M., Fracture evolution in the upper oceanic crust: evidence from DSDP Hole 504B, in Deformation Mechanisms, Rheology and Tectonics, edited by R.J. Knipe and E.H. Rutter, Geol. Soc. London Spec. Publ., 54, 41-50, 1990.
4. Agar, S.M., Microstructural evolution of a deformation zone in the upper ocean crust: evidence from DSDP Hole 504B, J. Geodynamics, 13, 119-140, 1991.
5. Agar, S.M., and F.C. Marton, Microstructural Controls on strain localization in ocean crust diabases: evidence from Hole 504B, Proc. Ocean Drilling Program Sci. Results, 137/140, 219-229, 1995.
6. Allerton, S., and F.J. Vine, Spreading evolution of the Troodos ophiolite, Cyprus, Geology, 19, 637-640, 1991.
7. Allerton, S., H.-U. Worm, and L.B. Stokking, Paleomagnetic and rock magnetic properties of Hole 896A, in Proc. Ocean Drilling Program, Sci. Results, 148, 217-226, 1996.
8. Alt, J.C., and H. Kinoshita, L.B. Stokking, et al., Proc. ODP, Init. Repts., 148: College Station, TX (Ocean Drilling Program), 1993.
9. Anderson, R.N., J. Honnorrez, and K. Becker, et al., Init. Repts. DSDP, 83: Washington (U.S. Govt. Printing Office), 1985.
10. Aumento, F., and H. Loubat, The Mid-Atlantic Ridge Near 45°N, XVI, Serpentinized ultramafic intrusions, Can. J. Earth Sci., 8, 631-663, 1971.
11. Auzende, J.M., M. Cannat, P. Gente, J.P. Henriet, T. Juetau, J.A. Karson, Y. Lagabrielle, and M.A. Tivey, Deep layers of mantie and oceanic crust exposed along the southem wall of the Kane Fracture Zone: Submersible observations, C.R. Acad. Sci. Ser. 2,317, 1641-1648, 1993.
12. Baker, N., P. Fryer, and F. Martinex, Rifting history of the northern Mariana Trough: SeaMARC II and seismic reflection surveys, J. Geophys. Res., 101, 11,427-11, 455, 1996.
13. Ballard R.D., R.T. Holcomb, and T.H. van Andel, The Galapagos Rift at 86°W: 3. Sheet flows, collapse pits, and lava lakes of the rift valley, J. Geophys. Res., 84, 5406-5422, 1979.
14. Ballard R.D., S. Francheteau, T. Juteau, C. Rangan, and W. Normark, The East Pacific Rise at 21 °N: The volcanic, tectonic, and hydrothermal processes of the central axis, Earth Planet. Sci. Lett., 55, 1-10, 1981.
15. Barth, G.A., Ocean crust thickens approaching the Clipperton fracture zone, Mar. Geophys. Res., 16, 51-64, 1994.
16. Becker, K., and H. Sakai, et al., Proceedings of the Ocean Drilling Program, Scientific Results, 111: College Station, TX (Ocean Drilling Program), 1988.
17. Becker, K., et al., Drilling deep into young oceanic crust, Hole 504B, Costa Rica Rift, Rev. Geophys., 27, 79-101, 1989.
18. Blackman, D.K., and D.W. Forsyth, Isostatic compensation of tectonic features of the Mid-Atlantic Ridge: 25°-27°30'S, J. Geophys. Res., 96, 11741-11758, 1991.
19. Bonatti, E., and J. Honnorez, Sections of the Earth's crust in the Equatorial Atlantic, J. Geophys. Res., 81, 4087-4103, 1976.
20. Bonatti, E., and C.G.A. Harrison, Eruption styles of basalt in oceanic spreading ridges and seamounts: effect of magma temperature and viscosity, J. Geophys. Res., 93, 2967-2980, 1988.
21. Borsi, L., U. Schärer, L. Gaggero, and L. Crispini, Age, origin, and geodynamic significance of plagiogranites in lherzolites and gabbros of the Piedmont-Ligurian ocean basin, Earth Planet. Sci. Lett., 140, 227-241, 1996.
22. Boudier, F., and R.G. Coleman, Cross-section through the peridotite in the Samail ophiolite, southeastern Oman Mountains, J. Geophys. Res., 86, 2573-2592, 1981.
23. Boudier, F., and A. Nicolas, Nature of the Moho transition zone in the Oman ophiolite, J. Petrol., 36, 777-790, 1995.
24. Boudier, F., C.J. MacLeod, and L. Bolou, Structures in peridotites from Site 895, Hess Deep: Implications for the geometry of mantie flow beneath the East Pacific Rise, Proc. Ocean Drilling Program Sci. Results, 147, 347-356, 1996.
25. Bown, J.W., and R.S. White, Variation with spreading rate of oceanic crustal thickness and geochemistry, Earth Planet. Sci. Lett., 121, 435-439, 1994.
26. Brown, J.R., and J.A. Karson, Variations in axial processes on the Mid-Atlantic Ridge: the median valley of the MARK area, Mar. Geophys. Res., 10, 109-138, 1988.
27. Cann, J.R., M.G. Langseth, et al., Init. Repts. DSDP, 69: Washington (U.S. Govt. Printing Office), 1983.
28. Cann, J.R., D.K. Blackman, D.K. Smith, E. McAllister, B. Janssen, S. Mello, E. Avgerinos, A.R. Pascoe, and J. Escartin, Corrugated slip surfaces formed at ridge-transform intersections on the Mid-Atlantic Ridge, Nature, 385, 329-332, 1997.
29. Cannat, M., Emplacement of mantie rocks in the seafloor at mid-ocean ridges, J. Geophys. Res., 98, 4163-4172, 1993.
30. Cannat, M., T. Juteau, and E. Berger, Petrostructural analysis of the Leg 109 serpentinized peridotites, in Proc. ODP, Sci. Results, 106/109, 47-56, 1990.
31. Cannat, M., C. Mevel, and D. Stakes, Stretching of the deep crust at the slow-spreading Southwest Indian Ridge, Tectonophysics, 190, 73-94, 1991.
32. Cannat, M., D. Bideau, and H. Bougault, Serpentinized peridotites and gabbros in the Mid-Atlantic Ridge axial valley at 57°37'N and 16°52'N, Earth Planet. Sci. Lett., 109, 87-106, 1992.
33. Cannat, M., J.A. Karson, D.J. Miller, et al., Proc. ODP, Init. Repts., 153: College Station, TX (Ocean Drilling Program), 798 pp, 1995a.
34. Cannat, M., and ten others, Thin crust, ultramafic exposures, and rugged faulting at the Mid-Atlantic Ridge (22°-24°N), Geology, 23, 49-52, 1995b.
35. Cannat, M., How thick is the magmatic crust at slow spreading oceanic ridges?, J. Geophys. Res., 101, 2847-2857, 1996.
36. Carbotte, S., and K.C. Macdonald, Comparison of seafloor tectonic fabric at intermediate, fast, and super fast spreading ridges: Influence of spreading rate, plate motions, and ridge segmentation on fault patterns, J. Geophys. Res., 99, 13609-13631, 1994.
37. Casey, J.F., J.A. Karson, D. Elthon, E. Rosencrantz, and M. Titus, Reconstruction of the geometry of accretion during formation of the Bay of Islands ophiolite complex, Tectonics, 2, 509-528, 1983.
38. Ceuleneer, G., Evidences for paleo-spreading centers in the Oman ophiolite: mantie structures in the Maqsad area, in Ophiolite Genesis and Evolution of the Oceanic Lithosphere, edited by Tj. Peters, A. Nicolas, and R.G. Coleman, Kluwer Academic Publishers, The Netherlands, 147-174, 1991.
39. Christensen, N.I., The abundance of serpentinites in the oceanic crust, J. Geol., 80, 709-719, 1972.
40. Christensen, N.I., and Salisbury, M.H., Structure and constitution of the lower oceanic crust, Rev. Geophys. Space Phys., 13, 57-86, 1975.
41. Christensen, N.I., and J.D. Smewing, Geology and seismic structure of the northem section of the Oman ophiolite, J. Geophys. Res., 86, 2545-2555, 1981.
42. Coleman, R.G., Plate tectonic emplacement of upper mantie peridotites along continental edges, J. Geophys. Res., 76, 1212-1222, 1971.
43. Collier, J., and M. Sinha, Seismic images of a magma chamber beneath the Lau Basin backarc spreading center, Nature, 348, 646-648, 1990.
44. Cortesogno, L., B. Galbiati, and G. Principi, Note alia "Carta geologica delle ofioliti del Bracco" e ricostruzione della paleogeografia giurassico-cretacica, Ofioliti, 12, 261-342, 1987.
45. Detrick, R., P. Buhi, J. Mutter, E. Vera, J. Orcutt, J. Madsen, and T. Brocher, Multichannel seismic imaging of magma chamber along the East Pacific Rise, Nature, 326, 35-41, 1987.
46. Detrick, R.S., J.C. Mutter, P. Buhi, and I.I. Kim, No evidence from multichannel reflection data for a crustal magma chamber in the MARK area on the Mid-Atlantic Ridge, Nature, 347, 61-64, 1990.
47. Detrick, R.S., R.S. White, and G.M. Purdy, Crustal structure of north Atlantic fracture zones, Rev. Geophys., 31, 439-458, 1993.
48. Detrick, R.S., J. Collins, R. Stephen, and S. Swift, In situ evidence for the nature of the seismic layer 2/3 boundary in oceanic crust, Nature, 370, 288-290, 1994.
49. Detrick, R.S., H.D. Needham, and V. Renard, Gravity anomalies and crustal thiekness variations along the Mid-Atlantic Ridge between 33°N and 40°N, J. Geophys. Res., 100, 3767-3787, 1995.
50. Dewey, J.F., and J.M. Bird, Origin and emplacement of the ophiolite suite: Appalachian ophiolites in Newfoundland, J. Geophys. Res., 76, 3179-3206, 1971.
51. Dick, H.J B., Abyssal peridotites, very slow spreading ridges and ocean ridge magmatism, in Magmatism in the Ocean Basins, edited by A.D. Saunders and M.J. Norry, Geol. Soc. London Spec. Pub., 42, 71-105, 1989.
52. Dick, H.B.J., Lithostratigraphic constraints on oceanic crustal structure, EOS Transactions, Am. Geophys. Union, 77, 748, 1996.
53. Dick, H.B.J., G. Thompson, and W.B. Bryan, Low angle faulting and steady state emplacement of plutonic rocks at ridge-transform intersections, EOS Transactions, Am. Geophys. Union, 62, 406, 1981.
54. Dick, H.J.B., P.S. Meyer, S. Bloomer, S. Kirby, D. Stakes, and C. Mawer, Lithostratigraphic evolution of an in-situ section of oceanic crust, Proc. Ocean Drilling Program, Sci. Results, 118, 439-538, 1991.
55. Dick, H.J.B., P.T. Robinson, and P.S. Meyer, The plutonic foundation of a slow-spreading ridge, Am. Geophys. Union, Geophysical Monograph 70, 1-39, 1992.
56. Dick, H.J.B., J.A. Erzinger, L.B. Stokking, et al., Proc. ODP, Init. Repts., 140: College Station, TX (Ocean Drilling Program), 1992.
57. Dilek, Y., and E.M. Moores, Structure, petrology, and origin of Kizil Dagh ophiolite, Southern Turkey: Comparison with Troodos, EOS Transactions, Am. Geophys. Union, 66, 1129, 1985.
58. Dilek, Y., Seafloor spreading structure of the Kizildag ophiolite, Turkey, in Proceedings of the International Earth Sciences Congress on Aegean Regions, IESCA 1995, edited by O. Piskin, M. Ergiin, M.Y. Savasţin, and G. Tarcan, Izmir-Turkey, 1, 37-52, 1997.
59. Dilek, Y., Structure and tectonics of intermediate-spread oceanic crust drilled at DSDP/ODP Sites 504B-896A, Costa Rica Rift, in Geological Evolution of Ocean Basins: Results from the Ocean Drilling Program-, edited by A. Cramp, C.J. McLeod, S.V. Lee, and E.J.W. Jones, Geological Society of London Special Publication, 131, 179-197, 1998.
60. Dilek, Y., and E.M. Moores, Regional tectonics of the eastern Mediterranean ophiolites, in Ophiolites, Oceanic Crustal Analogues, edited by J. Malpas, E.M. Moores, A. Panayiotou, and C. Xenophontos, Geol. Survey Dept. Cyprus, Nicosia, 295-309, 1990.
61. Dilek, Y., P. Thy, E.M. Moores, and T.W. Ramsden, Tectonic evolution of the Troodos ophiolite within the Tethyan framework, Tectonics, 9, 811-823, 1990.
62. Dilek, Y., E.M. Moores, M. Deleloye, and J.A. Karson, A magmatic extension and tectonic denudation in the Kizildag ophiolite, southem Turkey: Implications for the evolution of Neotethyan oceanic crust, in Ophiolite Genesis and Evolution of the Oceanic Lithosphere, edited by Tj.Peters, A. Nicolas, and R.G. Coleman, Kluwer Academic Publishers, The Netherlands, 487-502, 1991.
63. Dilek, Y., and M. Delaloye, Structure of the Kizildag ophiolite, a slow-spread Cretaceous ridge segment north of the Arabian promontory, Geology, 20, 19-22, 1992.
64. Dilek, Y., and C.A. Eddy, The Troodos (Cyprus) and Kizildag (S. Turkey) ophiolites as structural models for slow-spreading ridge segments, J. Geology, 100, 305-322, 1992.
65. Dilek, Y., G.D. Harper, P. Pezard, and P. Tartarotti, Structure of the lower sheeted dike complex in Hole-504B (Leg 148), in Proc. Ocean Drilling Program, Sci. Results, 148, 229-243, 1996a.
66. Dilek, Y, G.D. Harper, J. Walker, S. Allerton, and P. Tartarotti, Structure of upper layer 2 in Hole 896A, in Proc. Ocean Drilling Program, Sci. Results, 148, 261-279, 1996b.
67. Dilek, Y., Coulton, A., and Hurst, S., Serpentinization and hydrothermal veining in peridotites at Site 920 in the MARK area (Leg 153), in Proc. Ocean Drilling Program, Sci. Results, 153, 35-59, 1997a.
68. Dilek, Y., Kempton, P.D., Thy, P., Hurst, S.D., Whitney, D. L., and Kelley, D., Structure and petrology of hydrothermal veins in gabbroic rocks from Sites 921 to 924, MARK Area (Leg 153): Alteration history of slow-spread lower oceanic crust, in Proc. Ocean Drilling Program, Sci. Results, 153, 155-178, 1997b.
69. Dilek, Y., H. Furnes, and K.P. Skjerlie, Propagating rift tectonics of a Caledonian marginal basin: Multi-stage seafloor spreading history of the Solund-Stavfjord ophiolite in western Norway, Tectonophysics, 280, 213-238, 1997c.
70. Dilek, Y., and P. Thy, Structure, petrology, and seafloor spreading tectonics of the Kizildag ophiolite (Turkey), in Modem Ocean Floor Processes and the Geological Record, edited by K. Harrison and R. Mills, Geol. Soc. London Spec. Publ., 1998 (in press).
71. Dimitriev, B.R., J. Heirtzler, et al., Iniţial Reports of the Deep Sea Drilling Project, 46: Washington (U.S. Government Printing Office), 1978.
72. Dubertret, L., Géologie des roches vertes du nort-ouest de la Sýrie et du Hatay (Turquie), Notes Mém. Moyen-Orient, 6, 227, 1955.
73. Erendil, M., Petrology and structure of the upper crustal units of the Kizildag ophiolite, in Geology of the Taurus Belt, edited by O. Tekeli and M.C. Gonciioglu, Proceedings, Min. Res. Expl. lnst. Turkey, Ankara, 269-284, 1984.
74. Forslund, T., and A. Gudmundsson, Structure of Tertiary and Pleistocene normal faults in Iceland, Tectonics, 57-68, 1992.
75. Fox, P.J., R. S. Detrick, and G.M. Purdy, Evidence for crustal thinning near fracture zones: Implications for ophiolites, in Proceedings of the International Ophiolite Symposium, edited by A. Panayiotou, Geological Survey of Cyprus, Nicosia, 161-168, 1980.
76. Francheteau, J., R. Armijo, J.L. Cheminée, R. Hekinian, P. Lonsdale, and N. Blum, 1 Ma East Pacific Rise oceanic crust and uppermost mantie exposed by rifting in Hess Deep (equatorial Pacific Ocean), Earth Planet. Sci. Lett, 101, 281-295, 1990.
77. Francheteau, J., R. Armijo, J.L. Cheminée, R. Hekinian, P. Lonsdale, and N. Blum, Dike complex of the East Pacific Rise exposed in the walls of Hess Deep and the structure of the upper oceanic crust, Earth Planet. Sci. Lett., 111, 109-121, 1992.
78. Friih-Green, G.L., A. Plas, L.N. Dell Angelo, and C. Lécuyer, Multi-stage hydrothermal alteration of the EPR lower crust and shallow mantie at Hess Deep: mineralogical and stable isotope constraints, EOS Transactions, Am. Geophys. Union, 75, 649-650, 1994.
79. Friih-Green, G.L. A. Plas, L.N. Dell'Angelo, Mineralogic and stable isotope record of polyphase alteration of upper crustal gabbros of the East Pacific Rise (Hess Deep, Site 894), Proc. Ocean Drilling Program Sci. Results, 147, 235-291, 1996.
80. Furnes, H., K.P. Skjerlie, R.B. Pedersen, T.B. Anderson, C.J. Stillman, R. Suthren, M. Tysseland, and L.B. Garmann, The Solund-Stavfjord Ophiolite Complex and associated rocks, west Norwegian Caledonides: Geology, geochemistry and tectonic environment, Geol. Mag., 127, 209-289, 1990.
81. Furnes, H., R.J. Johansen, and K.P. Skjerlie, FeTi-poor and FeTi-rich basalts in the Solund-Stavfjord ophiolite complex, west Norwegian Caledonides: Relationships and genesis, N. Jb. Miner. Mh„ 4, 153-168, 1992.
82. Gass, I.G., The ultramafic volcanic assemblage of the Troodos Massif, Cyprus, in Ultramafic and Related Rocks: John Wiley, New York, 121-134, 1967.
83. Gass, I.G., and J.D. Smewing, Intrusion, extrusion and metamorphism at constructive margins: evidence from the Troodos massif, Cyprus, Nature, 242, 26-29, 1973.
84. Gente, P., R. Pockalny, C. Durand, C. Deplus, M. Maia, G. Ceuleneer, C. Meevel, M. Cannat, and C. Laverne, Characteristics and evolution of the segmentation of the Mid-Atlantic Ridge between 20°N and 24°N during the last 10 million years, Earth Planet. Sci. Lett., 129, 55-71, 1995.
85. Gillis, K., C. Mével, J. Allan, et al., Proc. ODP, Init. Repts., 147: College Station, TX (Ocean Drilling Program), 1993a.
86. Gillis, K.M., G. Thompson, and D.S. Kelley, A view of the lower crustal component of hydrothermal systems at the Mid-Atlantic Ridge, J Geophys. Res., 98, 19597-19619, 1993b.
87. Gudmundsson, A., Formation and growth of normál faults at the divergent plate boundary in Iceland, Terra Nova, 4, 464-471, 1992.
88. Harding, A.J., J.A. Orcutt, M.E. Kappus, E.E. Vera, J.C. Mutter, P. Buhl, R.S. Detrick, and T.M. Brocher, Structure of young oceanic crust at 13°N on the East Pacific Rise from expanding spread profiles, J. Geophys. Res., 94, 12613-12196, 1989.
89. Hawkins, J. W., S.H. Bloomer, C.A. Evans, and J.T. Melchior, Evolution of intra-oceanic arc-trench systems, Tectonophysics, 102, 175-205, 1984.
90. Hébert, R., A.C. Adamson, and S.C. Komor, Metamorphic petrology of ODP Leg 109, Hole 670A serpentinized peridotites: serpentinization processes at a slow spreading ridge environment, in Proc. Ocean Drilling Program, Sci. Results, 106/109, 103-115, 1990.
91. Hekinian, R., D. Bideau, J. Francheteau, J.L. Chéminée, R. Armijo, P. Lonsdale, and N. Blum, Petrology of the East Pacific Rise crust and upper mantie exposed in the Hess Deep (eastern equatorial Pacific), J. Geophys. Res., 98, 8069-8094, 1993.
92. Henstock, T.J., A.W. Woods, and R.S. White, The accretion of oceanic crust by episodic sili intrusion, J. Geophys. Res., 98, 4143-4161, 1993.
93. Hess, H.H., The history of the ocean basins, Geol. Soc. Am. Buddington Vol., 599-620, 1962.
94. Hey, R., Tectonic evolution of the Cocos-Nazca spreading center, Geol. Soc. Am. Bull., 88, 1404-1420, 1977.
95. Hey, R., L. Johnson, and A. Lowrie, Recent plate motion in the Galapagos “Area, Geol. Soc. Am. Bull., 88, 1385-1403, 1977.
96. Hill, M.N., Recent geophysical exploration of the ocean floor, Phys. Chem. Earth, 2, 129-163, 1957.
97. Honnorez, J., J.C. Alt, B.-M. Honnorez-Guerstein, C. Laverne, K. Muehlenbachs, J. Ruiz, and E. Saltzaman, Stockwork-like sulfide mineralization in young oceanic crust: Deep Sea Drilling Project Hole 504B, DSDP, 83, Washington (U.S. Govt. Printing Office), 263-245, 1985.
98. Hopson, C.A., R.G. Coleman, R.T. Gregory, J.S. Pallister, and E.H. Bailey, Geologic section through the Samail ophiolite and associated rocks along a Muscat-Ibra transect, southeastem Oman Mountains, J. Geophys. Res., 86, 2527-2544, 1981.
99. Hurst, S.D., and J.A. Karson, Paleomagnetism of tilted dikes in fast spread oceanic crust exposed in the Hess Deep Rift: Implications for spreading and rift propagation, Tectonics, 13, 789-802, 1994.
100. Hurst, S.D., E.M. Moores, and R.J. Varga, Structure and geophysical expression of the Solea graben, Troodos ophiolite, Cyprus, Tectonics, 13, 139-156, 1994.
101. Juteau, T., M. Ernewien, I. Reuber, H. Whitechurch, and R. Dahl, Duality of magmatism in the plutonic sequence of the Semail Nappe, Oman, Tectonophysics, 151, 107-135, 1988.
102. Juteau, T., E. Berger, and M. Cannat, Serpentinized, residual mantie peridotites from the M.A.R. Median valley, ODP Hole 670A (21°10'N, 45°02'W, Leg 109): Primary mineralogy and geothermometry, in Proc. ODP, Sci. Results, 106/109, 27-45, 1990.
103. Karson, J.A., Seafloor spreading on the Mid-Atlantic Ridge: implications for the structure of ophiolites and oceanic lithosphere produced in slow-spreading environments, in Ophiolites, Oceanic Crustal Analogues, edited by J. Malpas, E.M. Moores, A. Panayiotou, and C. Xenophontos, Geol. Survey Dept. Cyprus, Nicosia, 547-555, 1990.
104. Karson, J.A., and H.J.B. Dick, Tectonics of ridge-transform intersections at the Kane Fracture Zone, Mar. Geophys. Res., 6, 51-98, 1983.
105. Karson, J.A., G. Thompson, S.E. Humpris, J.M. Edmond, W.B. Bryan, J.B. Brown, A.T. Winters, R.A. Pockalny, J.F. Casey, A.C. Campbell, G.P. Klinkhammer, M.R. Palmer, R.J. Kinzler, and M.M. Sulanowska, Along-axis variations in seafloor spreading in the MARK area, Nature, 328, 681-685, 1987.
106. Karson, J.A., S.D. Hurst, and P. Lonsdale, Tectonic rotations of dikes in fast-spread oceanic crust exposed near Hess Deep, Geology, 20, 685-688, 1992.
107. Karson, J.A., Lawrence, R.M., Tectonic setting of serpentinite exposures on the westem median valley wall of the MARK area in the vicinity of Site 920, in Proc. Ocean Drilling Program, Sci. Results, 153, 3-21, 1997a.
108. Karson, J.A., Lawrence, R.M., Tectonic window into gabbroic rocks of the middle oceanic crust in the MARK area near Sites 921-924, in Proc. Ocean Drilling Program, Sci. Results, 153, 61-76, 1997b.
109. Kelley, D.S., and J.R. Delaney, Two-phase separation and fracturing in mid-ocean ridge gabbros at temperatures greater than 700’C, Earth Planet. Sci. Lett., 83, 53-66, 1987.
110. Kelley, D.S., K.M. Gillis, and G. Thompson, Fluid evolution in submarine magma-hydrothermal systems at the Mid-Atlantic Ridge, J. Geophys. Res., 98, 195-79-195-96, 1993.
111. Kempner, W.C., and J.F. Geetrust, Ophiolites, synthetic seismograms, and ocean crustal structure. 1. Comparison of ocean bottom seismometer data and synthetic seismograms for the Bay of Islands ophiolite, J. Geophys. Res., 87, 8447-8462, 1982.
112. Kent, G.M., S.A. Swift, R.S. Detrick, J.A. Collins, and R.A. Stephen, Evidence for active normal faulting on 5.9 Ma crust near Hole 504B on the southem flank of the Costa Rica Rift, Geology, 24, 83-86, 1996.
113. Kikawa, E., P.R. Kelso, J.E. Pariso, and C. Richter, Paleomagnetism of gabbroic rocks and peridotites from Sites 894 and 895, Leg 147, Hess Deep: results of half-core and whole-core measurements, Proc. Ocean Drilling Program,Sci. Results, 147, 383-391, 1996.
114. Kinoshita, H., T. Fruta, and J. Pariso, Downhole magnetic field measurements and paleomagnetism. Hole 504B, Costa Rica Ridge, in Proc Ocean Drilling Program, Sci. Results, 111, 147-156, 1989.
115. Kong, L.S., R.S. Detrick, P.J. Fox, L.A. Mayer, and W.B.F. Ryan, The morphology and tectonics of the MARK Area from Sea Beam and Sea MARK I observations (Mid-Atlantic Ridge 23°N), Mar. Geophys. Res., 10, 59-90, 1988.
116. Kong, L.S.L., S.C. Solomon, and G.M.J. Purdy, Microearthquake characteristics of a mid-ocean ridge along-axis high, J. Geophys. Res., 97, 1659-1685, 1992.
117. Lagabrielle, Y., and M. Cannat, Alpine Jurassic ophiolites resemble the modern Atlantic basement, Geology, 18, 319-322, 1990.
118. Langseth, M.G., M.J. Mottl, M.A. Hobart, and A. Fisher, The distribution of geothermal and geochemical gradients near Site 501/504: implications for hydrothermal circulation in the oceanic crust, Proc. ODP, Sci. Results, 111, 23-32, 1988.
119. Lemoine, M., G. Boillot, and P. Tricart, Ultramafic and gabbroic ocean floor of the Ligurian Tethys (Alps, Corsica, Apennines): In search of a genetic model, Geology, 15, 622-625, 1987.
120. Lin, J., G.M. Purdy, H. Schouten, J.-C. Sempere, and C. Zervas, Evidence from gravity data for focused magmatic accretion along the Mid-Atlantic Ridge, Nature, 344, 627-632, 1990.
121. Lippard, S.J., A.W. Shelton, and I.G. Gass, The ophiolite of Northern Oman, Geol. Soc. London Memoir 11, 178, 1986.
122. Lonsdale, P., Structural pattern of the Galapagos microplate and evolution of the Galapagos triple junctions, J. Geophys. Res., 93, 13551-13574, 1988.
123. MacCarthy, J., J.C. Mutter, J.L. Morton, N.H. Sleep, and G.A. Thompson, Relic magma chamber structures preserved within the Mesozoic North Atlantic crust, Geol. Soc. Am. Bull., 100, 1423-1436, 1988.
124. Macdonald, K.C., Mid-Ocean Ridges: Fine scale tectonics, volcanic and hydrothermal processes within the plate boundary zone, Ann. Rev. Earth Planet. Sci., 10, 155-190, 1982.
125. Macdonald, K.C., The crest of the Mid-Atlantic Ridge: Models for crustal generation processes and tectonics, in The Geology of North America, The Western North Atlantic Region, edited by P.R. Vogt and B.E. Tucholke, Geological Society of America, M, 51-68, 1986.
126. Macdonald, K.C., and B.P. Luyendyk, Investigation of faulting and abyssal hill formation on the flanks of the East Pacific Rise (21° N) using Alvin, Mar. Geophys. Res., 7, 515-535, 1986.
127. Macdonald, K.C., P.J. Fox, L.J. Perra'm, M.F. Eisen, R.M. Haymon, S.P. Miller, S.M. Carbotte, M.-H. Cormier, and A. N. Shor, A new view of the mid-ocean ridge from the behaviour of ridge-axis discontinuities, Nature, 335, 217-225, 1988.
128. Macdonald, K.C., P.J. Fox, R.T. Alexander, R. Pockalny, and P. Gente, Volcanic growth faults and the origin of Pacific abyssal hills, Nature, 380, 125-129, 1996.
129. 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 Modem Oceanic Analogues, edited by L.M. Parson, B. J. Murton, and P. Browning, Geol. Soc. London Spec. Publ. 60, 39-63, 1992.
130. MacLeod, C.J., and B.J. Murton, On the sense of slip of the Southem Troodos transform fault zone, Cyprus, Geology, 23, 257-260, 1993.
131. MacLeod, C.J., B. Célérier, G.L. Friih-Green, and C.E. Manning, Tectonics of Hess Deep: A synthesis of drilling results from Leg 147, Proc. Ocean Drilling Program,Sci. Results, 147, 461-475, 1996.
132. Manning, C.E., and C.J. MacLeod, Fracture-controlled metamorphism of Hess Deep gabbros, Site 894: Constraints on the roots of mid-ocean ridge hydrothermal systems at fast-spreading centers, Proc. Ocean Drilling Program, Sci. Results, 147, 189-212, 1996.
133. Marion, E., C. Mével, and M. Cannat, Evolution of oceanic gabbros from the MARK/Kane fracture intersection massif. Terra Abstr.,3, 310, 1991.
134. Mével, C., M. Cannat, P. Gente, E. Marion, J.M. Auzende, and J.A. Karson, Emplacement of deep crustal and mantie rocks on the west median valley wall of the MARK area (MAR 23° N). Tectonophysics, 190, 31-53, 1991.
135. Mével, C., K. Gillis, J.F. Allan, and P.S. Meyer (editors.), Proc. Ocean Drilling Program,Sci. Results, 147, 1996.
136. Moores, E. M., Origin and Emplacement of Ophiolites, Rev. Geophys. Space Physics, 20, 735-59, 1982.
137. Moores, E.M., and F.J. Vine, Troodos massif, Cyprus and other ophiolites as oceanic crust: Evaluation and implications, Phil. Trans. Roy. Soc. London, 268, 443-466, 1971.
138. Moores, E.M., R.J. Varga, K.L. Verosub, and T.W. Ramsden, Regional structure of the Troodos dyke complex, in Ophiolites, Oceanic Crustal Analogues, edited by J. Malpas, E.M. Moores, A. Panayiotou, and C. Xenophontos, Geol. Survey Dept. Cyprus, Nicosia, 27-35, 1990.
139. Morris, E., R.S. Detrick, T.A. Minshull, J.C. Mutter, R.S. White, W. Su, and P. Buhl, Seismic structure of oceanic crust in the westem North Atlantic, J. Geophys. Res., 98, 13879-13903, 1993.
140. Morton, J.L., and N.H. Sleep, Seismic reflections from the Lau Basin magma chamber, in Geology and Offshore Resources of Pacific Island Arcs—Tonga Region, edited by D. H. Scholl and T.L. Vallier, Circum Pacific Council for Energy and Mineral Resources, Earth Science Series, 441-453, 1985.
141. Mukasa, S.B., and J.N. Ludden, Uranium-lead ages of plagiogranites from the Troodos ophiolite, Cyprus, and their tectonic significance, Geology, 15, 825-828, 1987.
142. Murton, B.J., and I.G. Gass, Western Limassol Forest Complex, Cyprus: Part of an Upper Cretaceous leaky transform fault, Geology, 14, 255-258, 1986.
143. Mutter, J.C., and R.S. Detrick, Multichannel seismic evidence for anomalously thin crust at Blake Spur fracture zone, Geology, 12, 534-537, 1984.
144. Mutter, J.C. and North Atlantic Transect Study Group, Multichannel seismic images of the oceanic crust's internai structure: Evidence for a magma chamber beneath the Mesozoic Mid-Atlantic Ridge, Geology, 13, 629-632, 1985.
145. Mutter, J.C., and J.A. Karson, Structural processes at slow-spreading ridges, Science, 257, 627-634, 1992.
146. Naar, D.F., and R.N. Hey, Speed limit for oceanic transform faults, Geology, 17, 420-422, 1989.
147. Nicolas, A., Structures of ophiolites and dynamics of oceanic lithosphere. Kluwer Academic Publishers, The Netherlands, 367, 1989.
148. Nicolas, A., G. Ceuleneer, F. Boudier, and M. Misseri, Structural mapping in the Oman ophiolites: Mantie diapirism along an oceanic ridge, Tectonophysics, 151, 27-56, 1988.
149. Nicolas, A., and F. Boudier, Rootong of the sheeted dike complex in the Oman ophiolite, in Ophiolite Genesis and Evolution of the Oceanic Lithosphere, edited by Tj.Peters, A. Nicolas, and R.G. Coleman, Kluwer Academic Publishers, The Netherlands, 39-54, 1991.
150. Nicolas, A., C. Freydier, M. Godard, and A. Vauchez, Magma chambers at oceanic ridges: How large?, Geology, 21, 53-56, 1993.
151. Nicolas, A., F. Boudier, and B. Ildefonse, Dike patterns in diapirs beneath oceanic ridges: The Oman ophiolite, in Magmatic Systems, edited by M.P. Ryan, Academic Press, 77-95, 1994.
152. Nicolas, A., and F. Boudier, Mapping oceanic ridge segments in Oman ophiolite, J. Geophys. Res., 100, 6179-6197, 1995.
153. Orcutt, J.A., Structure of the Earth: Oceanic Crust and Uppermost Mantie, Rev. Geophys., 25, 1177-1196, 1987.
154. Pallister, J.S., Structure of the sheeted dike complex of the Semail ophiolite near Ibra, Oman, J. Geophys. Res., 86, 2661-2672, 1981.
155. Pallister, J.S., 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.
156. Pariso, J.E., J.H. Scott, E. Kikawa, and H.P. Johnson, A magnetic logging study of Hole 735B gabbros at the Southwest Indian Ridge, in Proc. ODP, Sci Results, 118, 309-321, 1991.
157. Pearce, J.A., S.J. Lippard, and S. Roberts, Characteristics and tectonic significance of supra-subduction zone ophiolites, in Marginal Basin Geology, edited by B.P. Kokelaar and M.F. Howells, Geol. Soc. Spec. Publ. 16, 11-96, 1984.
158. Phipps Morgan, J., A. Harding, J. Orcutt, G. 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, edited by M.P. Ryan, Academic Press, 139-178, 1994.
159. Porras, J.J., S.M. Wiggins, and M.D. LeRoy, Microearthquake location at the Hess Deep, EOS Transactions, Am. Geophys. Union, 76, S273, 1995.
160. Purdy, G. M., The variability in seismic structure of layer 2 near the East Pacific Rise at 12°N. J. Geophys. Res., 87, 8403-8416, 1982.
161. Purdy, G.M., and R.S. Detrick, Crustal structure of the Mid-Atlantic Ridge at 23°N from seismic refraction studies, J. Geophys. Res., 91, 3739-3762, 1986.
162. Raitt, R.W., Seismic refraction studies of the Pacific Ocean basin, Bull. Geol. Soc. Am., 67, 1623-40, 1956.
163. Raitt, R.W., The crustal rock, in The Sea, edited by M.N. Hill, Wiley Interscience (New York), 85-102, 1963.
164. Reid, I., and H.R. Jackson, Oceanic spreading rate and crustal thickness, Mar. Geophys. Res., 5, 165-172, 1981.
165. Reynolds, S.J., and G.S. Lister, Folding of mylonitic zones in Cordilleran metamorphic core complexes: Evidence from near the mylonitic front, Geology, 18, 216-219, 1990.
166. Rona, P.A., L. Widenfalk, and K. Bostrôm, Serpentinized ultramafics and hydrothermal activity at the Mid-Atlantic Ridge crest near 15°N, J. Geophys. Res., 92, 1417-1427, 1987.
167. Rosendahl, R.B., R. Hekinian, et al., Iniţial Reports of the Deep Sea Drilling Project, 54: Washington (U.S. Government Printing Office), 1980.
168. Salisbury, M.H., N.I. Christensen, and R.H. Wilkens, The nature of the layer 2/3 transition from a comparison of laboratory and logging velocities and petrology at the base of Hole 5094B, in Proc. ODP, Sci. Results, 148, 409-414, 1996.
169. Schiffman, P., B.M. Smith, R.J. Varga, and E.M. Moores, Geometry, conditions, and timing of off-axis hydrothermal metamorphism and ore-deposition in the Solea graben, Nature, 325, 423-425, 1987.
170. Schouten, H., K.D. Klitgord, and J.A. Whitehead, Segmentation of mid-ocean ridges, Nature, 317, 225-229, 1985.
171. Sempere, J.-C., and K.C. Macdonald, Marine tectonics: Processes at mid-ocean ridges, Rev. Geophys., 25, 1313-1347, 1987.
172. Sempere, J.-C., G.M. Purdy, and H. Schouten, Segmentation of the Mid-Atlantic Ridge between 24°N and 30°40'N, Nature, 344, 427-431, 1990.
173. Simonian, K.O., and I.G. Gass, Arakapas fault belt. Cyprus: A fossil transform fault, Geol. Soc. Am. Bull., 89, 1220-1230, 1978.
174. Sinton J.M., and R.S. Detrick, Mid-ocean ridge magma chambers, J. Geophys. Res., 97, 197-216, 1992.
175. Skjerlie, K.P., H. Furnes, and R.J. Johansen, Magmatic development and tectonomagmatic models for the Solund-Stavfjord Ophiolite Complex, West Norwegian Caledonides, Lithos, 23, 137-151, 1989.
176. Skjerlie, K.P., and H. Furnes, Evidence for a fossil transform fault in the Solund/ Stavfjord Ophiolite Complex: West Norwegian Caledonides, Tectonics, 9, 1631-1648, 1990.
177. Sleep, N.H., Formation of ocean crust: Some thermal constraints, J. Geophys. Res., 80, 4037-4042, 1975.
178. Sleep, N.H., and G.A. Barth, The nature of the oceanic lower crust and shallow mantie emplaced at low spreading rates (abstract), EOS Transactions. Am. Geophys. Union, 75, 626, 1994.
179. Smith, D., and J.R. Cann, Building the crust at the Mid-Atlantic Ridge, Nature, 365, 707-715, 1993.
180. Stakes, D.S., C. Mével, M. Cannat, and T. Chaput, Metamorphic stratigraphy of Hole 735B, in Proc. ODP, Sci Results, 118, 153-180, 1991.
181. Swift, S.A., R.A. Stephen, Hole 504B Seismic experiment: Single channel seismic survey reveals recent faulting and basement relief near crustal boreholes, EOS Transactions. Am. Geophys.Union, 76, F616, 1995.
182. Tartarotti, P., S. Allerton, and C. Laverne, Vein formation mechanisms in the sheeted dike complex from Hole 504B, in Proc. Ocean Drilling Program, Sci. Results, 137/140, 231-241, 1995.
183. Thompson, G., and W.G. Melson, The petrology of oceanic crust across fracture zones in the Atlantic Ocean: Evidence of a new kind of sea-floor spreading, J. Geology, 80, 526 538, 1972.
184. Tilton, G.R., C.A. Hopson, and J.E. Wright, U/Pb isotopic ages of the Samail opholites, Oman, with applications to Tethyan Ocean Ridge Tectonics, J. Geophys. Res., 86, 2763-2777, 1981.
185. Tolstoy, M.A., J. Harding, and J.A. Orcutt, Crustal structure on the Mid-Atlantic Ridge: Bull's eye gravity anomalies and focused accretion, Science, 262, 726-729, 1993.
186. Toomey, D.R., S.C. Solomon, G.M. Purdy, and M.H. Murray, Microearthquakes beneath the median valley of the Mid-Atlantic Ridge near 23°N: Tomography and tectonics, J. Geophys. Res., 93, 9093-9112, 1988.
187. Toomey, D.R., G. M. Purdy, S.C. Solomon, and W.S.D. Wilcock, The three-dimensional seismic velocity structure of the East Pacific Rise near latitude 9°30' N, Nature 347, 639-645, 1990.
188. Tucholke, B.E., and J. Lin, A geological model for the structure of ridge segments in slow spreading ocean crust, J. Geophys. Res., 99, 11937-11958, 1994.
189. Van Everdingen, D.A., and P.A. Cawood, Dyke domains in the Mitsero graben, Troodos ophiolite, Cyprus: an off-axis model for graben formation at a spreading centre, J. Geol. Soc. London, 152, 923-932, 1995.
190. Varga, R.J., and E.M. Moores, Spreading structure of the Troodos ophiolite, Cyprus, Geology, 13, 846-850, 1985.
191. Venturelli, G., R.S. Thorpe, and P.J. Potts, Rare earth and trace element characteristics of ophiolitic metabasalts from the Alpine-Apennine belt, Earth Planet. Sci. Lett., 53, 109-123, 1981.
192. Vera, E.E., J.C. Mutter, P. Buhl, J.A. Orcutt, A.J. Harding, M.E. Kappus, R.S. Detrick, and T.M. Brocher, The structure of 0-to 0.2 m.y.-old oceanic crust at 9°N on the East Pacific Rise from expanded spread profiles, J. Geophys. Res., 95, 15529-15556, 1990.
193. Verosub, K.L., and E.M. Moores, Tectonic rotations in extensional regimes and their paleomagnetic consequences for oceanic basalts, J. Geophys. Res., 86, 6335-6349, 1981.
194. White, R.S., R.S. Detrick, J.C. Mutter, P. Buhl Minshhull, and E. Morris, New seismic images of oceanic crustal structure, Geology, 18, 462-465, 1990.
195. Whitehead, J.A., Jr., H.J.B. Diek, and H. Schouten, A mechanism for magmatic accretion under spreading centres, Nature, 312, 146-148, 1984.