Seafloor Electromagnetic Measurements above Axial Seamount, Juan dc Fuca Ridge

Journal of Geomagnetism and Geoelectricity

Volumn 49, Issue 42686, 1997, Pages 1327-1342

  Constable, S C ^a   Anderson, G ^a   Heinson, G S ^b   White, A ^b  

^a UNIVERSITY OF CALIFORNIA   (United States)

^b FLINDERS UNIVERSITY   (Australia)

Author keywords

[No Author keywords available]

Indexed keywords

ELECTROMAGNETIC ANOMALY; MAGNETOTELLURICS;

PACIFIC, JUAN DE FUCA RIDGE, AXIAL SEAMOUNT;

EID: 0031401262     PISSN: 00221392     EISSN: None     Source Type: Journal    
DOI: 10.5636/jgg.49.1327     Document Type: Article

References (41)

1. Anderson, G., S. C. Constable, H. Staudigel, and F. K. Wyatt, A seafloor long-baseline tiltmeter, J. Geophys. Res., 102, 20, 269 20, 285, 1997.
2. Appelgate Jr., T. B., Volcanic and structural morphology of the south flank of Axial Volcano, Juan de Fuca Ridge: results from a SeaMARC t side scan sonar survey, J. Geophys. Res., 95, 12, 765-12, 783, 1990.
3. Cannon, G. A. and D. J. Pashinski, Circulation near Axial Seamount, J. Geophys. Res., 95, 12, 823-12, 828, 1990.
4. Cannon, G. A. and R. E. Thomson, Characteristics of 4-day oscillations trapped by the Juan de Fuca Ridge, Geophys. Res. Lett., 23, 1, 613-1, 616, 1996.
5. Chave, A. D. and J. T. Smith, On electric and magnetic galvanic distortion tensor decompositions, J. Geophys. Res., 99, 4, 669-4, 682, 1994.
6. Chave, A. D. and D. J. Thomson, Some comments on magnetotelhiric response function estimation, J. Geophys. Res., 94, 14, 215-14, 225, 1989. Chave, A. D., J, H. Filioux, D. S. Luther, L. K. Law, and A. White, Observations of motional electromagnetic fields during EMSLAB, J. Geophys. Res., 94, 14, 153-14, 166, 1989.
7. Constable, C. G. and R. L. Parker, Smoothing, splines and smoothing splines; their application in geomagnetism, J. Comput. Phys., 78, 493-508, 1988.
8. Constable, S. C. and C. S. Cox, Marine controlled-source electromagnetic sounding II: The PEGASUS experiment, J. Geophys. Res., 101, 5, 519-5, 530, 1996.
9. Constable, S. C., R. L. Parker, and C. G. Constable, Occam's inversion: a practical algorithm for generating smooth models from electromagnetic sounding data, Geophysics, 52, 289-300, 1987.
10. Constable, S. C., A. Orange, G. M. Hoversten. and H. F. Morrison, Marine magnetotellurics for petroleum exploration 1. A seafloor instrument system, Geophysics, 1997 (in press).
11. Cox, C. S., S. C. Constable, A. D. Chave, and S. C. Webb, Controlled source electromagnetic sounding of the oceanic lithospbere, Nature, 320, 52-54, 1986.
12. deGroot-Hedlin, C. and S. C. Constable, Occam's inversion to generate smooth, two-dimensional models from magnetotellurie data, Geophysics, 55, 1, 613-1, 624, 1990.
13. Delaney, J. R., H. P. Johnson, and J. L. Karsten, The Juan de Fuca Ridge-hot spot-propagating rift system: New tectonic, geochemical and magnetic data, J. Geophys. Res., 86, 11, 747-11, 750, 1981.
14. Desonie, D. L. and R. A. Duncan, The Cobb-Eickelberg Seamount Chain: hotspot volcanism with mid-ocean ridge basalt affinity, J. Geophys. Res., 95, 12, 697-12, 711, 1990.
15. Elthon, D., Pressure of origin of primary mid-ocean ridge basalts, in Magmatism m the Ocean Basins, edited by A. D. Saunders and M. J. Norry, pp. 125-136, Geological Soc. Spec. Pub., 1989.
16. Embley, R. W., K. M. Murphy, and C. G. Fox, High-resolution studies of the summit of Axial Volcano, J. Geophys. Res., 95, 12, 785-12, 812, 1990 Filloux, J. H., Magnetotelluric exploration of the North Pacific: progress report and preliminary soundings near a. spreading ridge, Phys. Earth Planet. Int., 25, 187-195, 1981.
17. Filloux, J. H., Instrumentation and experimental methods for oceanic studies, in Geomagnetism, edited by J. A. Jacobs, pp. 143-248, Academic Press, London, 1987.
18. Fox, C. G., Evidence of active ground deformation on the mid-ocean ridge: Axial Seamount, Juan de Fuca Ridge, April-June 1988, J. Geophys. Res., 95, 12, 735-12, 812, 1990.
19. Groom, R. W. and R. C. Bailey, Decomposition of magnetotelluric impedance tensors in the presence of local three-dimensional galvanic distortion, J. Geophys. Res., 94, 1, 913-1, 925, 1989.
20. Heinson, G. S. and S. C. Constable, The electrical conductivity of the oceanic upper mantle, Geophys. J. Int., 110, 159-179, 1992.
21. Heinson, G. S., A. White, L. K. Law, Y. Hamano, H. Utada, J. Yukutake, J. Segawa, and H. Toh, EMRIDGE: the electromagnetic investigation of the Juan de Fuca Ridge, Mar. Geophys. Res., 15, 77-100, 1993.
22. Heinson, G. S., S. C. Constable, and A. White, Seafloor magnetotelluric sounding above Axial Seamount, Geophys. Res. Lett., 23, 2, 275-2, 278, 1996.
23. Heinson, G. S., A. White, and S. C. Constable, RAMESSES IV: Seafloor magnetotelluric sounding above a slow-spreading ridge, Geophys. J. Int., 1997 (submitted).
24. Hildebrand, J. A., J. M. Stevenson, P. T. C. Hammer, M. A. Zumberge, R. L. Parker, C. G. Fox, and P. J. Meis, A seafloor and sea surface gravity survey of Axial Volcano, J. Geophys. Res., 95, 12, 751-12, 763, 1990.
25. Johnson, H. P. and R. W. Embley, Axial Seamount: an active ridge axis volcano on the central Juan de Fuca Ridge, J. Geophys. Res., 95, 12, 689-12, 696, 1990.
26. Luther, D. S., Waves trapped to discrete topography: existence and implications, Topographic effects in the ocean, proceedings, 'Aha Huliko'a Hawaiian Winter Workshop, University of Hawaii at Manoa, January 17-20, 1995, edited by P. Muller and D. Henderson, pp. 43-56, School of Ocean and Earth Science and Technology, University of Hawaii, Honolulu, 1995.
27. Mackie, R. L. and T. R. Madden, Three-dimensional magnetotelluric inversion using conjugate gradients, Geophys. J. Int., 115, 215-229, 1993a.
28. Mackie, R. L. and T. R. Madden, Conjugate direction relaxation solutions for 3-D magnetotelluric modelling, Geophysics, 58, 1, 052-1, 057, 1993b.
29. Mackie, R. L., T. R. Madden, and P. E. Wannamaker, Three-dimensional magnetotelluric modelling using difference equations-theory and comparison to integral equation solutions. Geophysics, 58, 215-226, 1993.
30. Park, J., C. R. Lindberg, and F. L. Vernon, Multitaper spectral analysis of high-frequency seismograms, J. Geophys. Res., 92, 12, 675-12, 684, 1987.
31. Parker, R. L. and K. A. Whaler, Numerical methods for establishing solutions to the inverse problem of electromagnetic induction, J. Geophys, Res., 86, 9, 574-9, 584, 1981.
32. Rhodes, J. M., C. Morgan, and R. A. Liias, Geochemistry of Axial Seamount lavas: magmatic relationship between the Cobb hotspot and the Juan de Fuca Ridge, J. Geophys. Res., 95, 12, 713-12, 733, 1990.
33. Sinha, M. C., D. A. Navin, L. M. MacGregor, S. C. Constable, C. Peirce. A. White, G. S. Heinson. and M. A. lnglis, Evidence for accumulated melt beneath the slow-spreading Mid-Atlantic Ridge, Phil. Trans. R. Soc. Lond., 355, 233-253, 1997.
34. Tarits, P., A. D. Chave, and A. Schultz, Comment on “The electrical conductivity of the oceanic upper mantle”, by G. Heinson and S. Constable, Geophys. J. Int., 114, 711-716, 1993.
35. Thomson, D. J. and A. D. Chave, Jackknife error estimates for spectra, coherences, and transfer functions, in Advances in Spectrum Analysis and Array Processing, edited by S. Haykin, pp. 58-113, Prentice-Hall, Englewood Cliffs, N.J., 1991.
36. Tivey, M. A. and H. P. Johnson, The magnetic structure of Axial Seamount, Juan de Fuca Ridge, J. Geophys. Res., 95, 12, 735-12, 750, 1990.
37. Vernon, F. L., J. B. Fletcher, L. Carroll, A. D. Chave, and E. Sembera, Coherence of seismic body waves from local events as measured by a small-aperture array, J. Geophys. Res., 96, 11, 981-11, 996, 1991.
38. Wannamaker, P. E., J. R. Booker, J. H. Filloux, A. G. Jones, G. R. Jiracek, A. D. Chave, P. Tarits, H. S. Waff, G. D. Egbert, C. T. Young, J. A. Stodt, M. Martinez, L. K. Law, T. Yukutake, J. Segawa, A. White, and A. W. Green Jr., Magnetotelluric observations across the Juan de Fuca subduction system in the EMSLAB project, J. Geophys. Res., 94, 14, 111-14, 125. 1989a.
39. Wannamaker, P. E., J. R. Booker, A. G. Jones, A. D. Chave, J, H. Filloux, H. S. Waff, and L. K. Law, Resistivity cross section through the Juan de Fuca ridge subduction system and its tectonic implications, J. Geophys. Res., 94, 14, 127-14, 144, 1989b.
40. Wessel, P. and W. H. F. Smith, Free software helps map and display data, EOS, Trans. AGU, 72, 441, 1991.
41. White, A., A seafloor magnetometer for the continental shelf, Mar. Geophys. Res., 4, 105-114, 1979.