Olivine enigma: Why alteration controls the seismic properties of oceanic gabbros

Geochemistry, Geophysics, Geosystems

Volumn 10, Issue 3, 2009, Pages

  Carlson, R L ^a   Miller, D Jay ^a   Newman, J ^a  

^a TEXAS A AND M UNIVERSITY   (United States)

Author keywords

Alteration; Composition; Gabbro; Oceanic crust; Seismic structure; Seismic velocity

Indexed keywords

EID: 71949103386     PISSN: 15252027     EISSN: 15252027     Source Type: Journal    
DOI: 10.1029/2008GC002263     Document Type: Article

References (29)

1. Aleksandrov, K. S., and T. V. Ryzhova (1961), Elastic properties of crystals, Sov. Phys. Crystallogr., 6, 228-252.
2. Becker, K. , et al. (1992), Proceedings of the Ocean Drilling Program, Initial Reports, vol. 137, Ocean Drill. Program, College Station, Tex.
3. Carlson, R. L. (2001), The effects of temperature, pressure, and alteration on seismic properties of diabase dike rocks from DSDP/ODP Hole 504B, Geophys. Res. Lett., 28, 3979-3982.
4. Carlson, R. L., and A. F. Gangi (1985), Effect of cracks on the pressure dependence of P wave velocities in crystalline rocks, J. Geophys. Res., 90, 8675-8684, doi:10.1029/JB090iB10p08675.
5. Carlson, R. L., and D. J. Miller (2004), Influence of pressure and mineralogy on seismic velocities in oceanic gabbros: Implications for the composition and state of the lower oceanic crust, J. Geophys. Res., 109, B09205, doi:10.1029/2003JB002699. (Pubitemid 39615562)
6. Cheng, C. H., and M. N. Toksöz (1979), Inversion of seismic velocities for the pore aspect ratio spectrum of a rock, J. Geophys. Res., 84, 7533-7543.
7. Christensen, N. I., and M. H. Salisbury (1975), The structure and constitution of the lower oceanic crust, Rev. Geophys., 13, 57-86, doi:10.1029/RG013i001p00057.
8. Christensen, N. I., and J. D. Smewing (1981), Geology and seismic structure of the northern section of the Oman ophio-lite, J. Geophys. Res., 86, 2545-2555, doi:10.1029/JB086iB04p02545.
9. Coleman, R. G. (1977), Ophiolites: Ancient Oceanic Lithosphere?, 229 pp., Springer, New York.
10. Collins, J. A., T. M. Brocher, and G. M. Purdy (1989), Seismic velocity structure at Deep Sea Drilling Project Site 504B: Evidence for thin oceanic crust, J. Geophys. Res., 94, 9283-9302, doi:10.1029/JB094iB07p09283.
11. Detrick, R. S., J. A. Collins, R. A. Stephen, and S. A. Swift (1994), In situ evidence for the nature of the seismic layer 2/3 boundary in oceanic crust, Nature, 370, 288-290, doi:10.1038/370288a0. (Pubitemid 24250121)
12. Gangi, A. F., and R. L. Carlson (1996), An asperity-deformation model for effective pressure, Tectonophysics, 256, 241-251, doi:10.1016/0040-1951(95) 00167-0.
13. Gillis, K. M., et al. (1993), Proceedings of the Ocean Drilling Program, Initial Reports, 147 pp., Ocean Drill. Program, College Station, Tex.
14. Harvey, P. K., T. S. Brewer, M. A. Lovell, and S. A. Kerr (1998), The estimation of modal mineralogy: A problem of accuracy in core-log calibration, in Core-Log Integration, edited by P.K. Harvey and M.S. Lovell, Geol. Soc. Spec. Publ., 136, 25-38.
15. Hill, R. (1952), The elastic behavior of crystalline aggregate, Proc. Phys. Soc. London, Sect. A, 65, 349-354.
16. Iturrino, G. J., N. I. Christensen, S. Kirby, and M. H. Salisbury (1991), Seismic velocities and elastic properties of oceanic gabbroic rocks from Hole 735B, Proc. Ocean Drill. Program Sci. Results, 118, 227-244.
17. Iturrino, G. J., D. J. Miller, and N. I. Christensen (1996), Velocity behavior of lower crustal and upper mantle rocks from a fast-spreading ridge at Hess Deep, Proc. Ocean Drill. Program Sci. Results, 147, 417-440.
18. Karson, J. A., M. A. Tivey, and J. R. Delaney (2002), Internal structure of uppermost oceanic crust along the Western Blanco Transform Scarp: Implications for subaxial accretion and deformation at the Juan de Fuca Ridge, J. Geophys. Res., 107(B9), 2181, doi:10.1029/2000JB000051.
19. Kuster, G. T., and M. N. Toksöz (1974), Velocity and attenuation of seismic waves in two-phase media: Part I. Theoretical formulations, Geophysics, 39, 587-606, doi:10.1190/1.1440450.
20. Maloy, A. K., and A. H. Treiman (2007), Evaluation of image classification routines for determining modal mineralogy of rocks from X-ray maps, Am. Mineral., 92, 1781-1788, doi:10.2138/am.2007.2477. (Pubitemid 350253216)
21. Miller, D. J., and N. I. Christensen (1997), Seismic velocities of lower crustal and upper mantle rocks from the slowspreading Mid-Atlantic Ridge, south of the Kane Fracture Zone (MARK), Proc. Ocean Drill. Program Sci. Results, 153, 437-454.
22. Pederson, R. B., J. Malpas, and T. Falloon (1996), Petrology and geochemistry of gabbros and related rocks from Site 894, Hess Deep, Proc. Ocean Drill. Program Sci. Results, 147, 3-19.
23. Robinson, P. T., et al. (1989), Proceedings of the Ocean Drilling Program, Initial Reports, vol. 118, Ocean Drill. Program, College Station, Tex.
24. Salisbury, M. H., and N. I. Christensen (1978), The seismic velocity structure of a traverse through the Bay of Islands ophiolite complex, Newfoundland, an exposure of oceanic crust and upper mantle, J. Geophys. Res., 83, 805-817, doi:10.1029/JB083iB02p00805.
25. Salisbury, M. H., N. I. Christensen, and R. H. Wilkens (1996), Nature of the layer 2/3 transition from a comparison of laboratory and logging velocities and petrology at the base of hole 504B, Proc. Ocean Drill. Program Sci. Results, 148, 141-409.
26. Spudich, P. , and J. Orcutt (1980), Petrology and porosity of an oceanic crustal site: Results from wave form modeling of seismic refraction data, J. Geophys. Res., 85, 1409-1433, doi:10.1029/JB085iB03p01409.
27. Voigt, W. (1910), Lerhbuch der Kristallphysik, Teubner, Berlin.
28. Wilkens, R. H., G. J. Fryer, and J. Karsten (1991), Evolution of porosity and seismic structure of upper oceanic crust: Importance of aspect ratios, J. Geophys. Res., 96, 17, 981-17, 995, doi:10.1029/91JB01454.
29. Wilson, D. S., et al. (2006), Drilling gabbro in intact ocean crust, Science, 312(5776), 1016-1020, doi:10.1126/science. 1126090. (Pubitemid 44846385)