Magnetization of axial lavas from the southern East Pacific Rise (14°-23°S): Geochemical controls on magnetic properties

Journal of Geophysical Research: Solid Earth

Volumn 102, Issue 11, 1997, Pages 24873-24886

  Gee, Jeff ^a   Kent, Dennis V ^b  

^a GEOSCIENCES RESEARCH DIVISION   (United States)

^b Department of Earth and Environmental Sciences   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

GEOCHEMISTRY; LAVA; MAGNETIC PROPERTIES; MAGNETIZATION; MID OCEAN RIDGE; MID-OCEAN RIDGES;

PACIFIC, EAST PACIFIC RISE;

EID: 0031418092     PISSN: 21699313     EISSN: 21699356     Source Type: Journal    
DOI: 10.1029/97jb02544     Document Type: Article

References (52)

1. Anderson, R. N., D. A. Clague, K. D. Klitgord, M. Marshall, and R. K. Nishimori, Magnetic and petrologic variations along the Galapagos spreading center and their relation to the Galapagos melting anomaly, Geol. Soc. Am. Bull., 86, 683-694, 1975.
2. Bina, M. M., and M. Prévot, Thermomagnetic investigations of titanomagnetite in submarine basalts: Evidence for differential maghemitization, Phys. Earth Planet. Inter., 54, 169-179, 1989.
3. Christie, D. M., and J. M. Sinton, Evolution of abyssal lavas along propagating segments of the Galapagos spreading center, Earth Planet. Sci. Lett., 56, 321-335, 1981.
4. Day, R., M. D. Fuller, and V. A. Schmidt, Hysteresis properties of titanomagnetites: Grain-size and compositional dependence, Phys. Earth Planet. Inter., 13, 260-267, 1977.
5. DeBoer, J., Variations of the magnetic properties of postglacial pillow lavas along the Reykjanes Ridge, J. Geophys. Res., 80, 3769-3776, 1975.
6. Detrick, R. S., A. J. Harding, G. M. Kent, J. A. Orcutt, J. C. Mutter, and P. Buhl, Seismic structure of the southern East Pacific Rise, Science, 259, 499-503, 1993.
7. Furuta, T., Magnetic properties and ferromagnetic mineralogy of oceanic basalts, Geophys. J. Int., 113, 95-114, 1993.
8. Gee, J., and D. V. Kent, Variations in Layer 2A thickness and the origin of the Central Anomaly magnetic high, Geophys. Res. Lett., 21, 297-300, 1994.
9. Gee, J., and D. V. Kent, Magnetic hysteresis in young mid-ocean ridge basalts: Dominant cubic anisotropy?, Geophys. Res. Lett., 22, 551-554, 1995.
10. Gee, J., D. A. Schneider, and D. V. Kent, Marine magnetic anomalies as recorders of geomagnetic intensity variations, Earth Planet. Sci. Lett., 144, 327-335, 1996.
11. Grommé, S., E. A. Mankinen, M. Marshall, and R. S. Coe, Geomagnetic paleointensities by the Thelliers' method from submarine pillow basalts: Effects of seafloor weathering, J. Geophys. Res., 84, 3553-3575, 1979.
12. Hooft, E. E. E., R. S. Detrick, and G. M. Kent, Seismic structure and indicators of magma budget along the southern East Pacific Rise, J. Geophys. Res., in press, 1997.
13. Hussenoeder, S. A., M. A. Tivey, H. Schouten, and R. C. Searle, Near-bottom magnetic survey of the Mid-Atlantic Ridge axis, 24°-24°40′N: Implications for crustal accretion at slow spreading ridges, J. Geophys. Res., 101, 22,051-22,069, 1996.
14. Johnson, H. P., and M. L. Holmes, Evolution in plate tectonics; The Juan de Fuca Ridge, in The Geology of North America, vol. N, The Eastern Pacific Ocean and Hawaii, edited by E. L. Winterer, and D. M. Hussong, pp. 73-91, Geol. Soc. of Am., Boulder, Colo., 1989.
15. Johnson, H. P., and J. E. Pariso, Variations in oceanic crustal magnetization: Systematic changes in the last 160 million years, J. Geophys. Res., 98, 435-445, 1993.
16. Johnson, H. P., and M. A. Tivey, Magnetic properties of zero-age oceanic crust: A new submarine lava flow on the Juan de Fuca Ridge, Geophys. Res. Lett., 22, 175-178, 1995.
17. Juster, T. C., T. L. Grove, and M. R. Perfit, Experimental constraints on the generation of FeTi basalts, andesites, and rhyodacites at the Galapagos spreading center, 85°W and 95°W, J. Geophys. Res., 94, 9251-9274, 1989.
18. Kent, D. V., and J. Gee, Grain size dependent alteration and the magnetization of oceanic basalts, Science, 265, 1561-1563, 1994.
19. Kent, D. V., and J. Gee, Magnetic alteration of zero-age oceanic basalt, Geology, 24, 703-706, 1996.
20. Klitgord, K. D., Sea-floor spreading: The central anomaly magnetization high, Earth Planet. Sci. Lett., 29, 201-209, 1976.
21. Klitgord, K. D., S. P. Huestis, J. D. Mudie, and R. L. Parker, An analysis of near-bottom magnetic anomalies: Sea-floor spreading and the magnetized layer, Geophys. J. R. Astron. Soc., 43, 387-424, 1975.
22. Lonsdale, P., Segmentation of the Pacific-Nazca spreading center, 1°N-20°S, J. Geophys. Res., 94, 12,197-12,225, 1989.
23. Macdonald, K. C., R. M. Haymon, S. P. Miller, J.-C. Sempere, and P. J. Fox, Deep-Tow and Sea Beam studies of dueling propagating ridges on the East Pacific Rise near 20°40′S, J. Geophys. Res., 93, 2875-2898, 1988a.
24. Macdonald, K. C., P. J. Fox, L. J. Perram, 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, 1988b.
25. Mahoney, J. J., J. M. Sinton, M. D. Kurz, J. D. Macdougall, K. J. Spencer, and G. W. Lugmair, Isotope and trace element characteristics of a super-fast spreading ridge: East Pacific Rise, 13-23°S, Earth Planet. Sci. Lett., 121, 173-193, 1994.
26. Marshall, M., and A. Cox, Magnetism of pillow basalts and their petrology, Geol. Soc. Am. Bull., 82, 537-552, 1971.
27. Marshall, M., and A. Cox, Magnetic changes in pillow basalt due to sea floor weathering, J. Geophys. Res., 77, 6459-6469, 1972.
28. Melson, W. G., T. L. Vallier, T. L. Wright, G. Byerly, and J. Nelen, Chemical diversity of abyssal volcanic glass erupted along Pacific, Atlantic, and Indian Ocean sea-floor spreading centers, in The Geophysics of the Pacific Ocean Basin and Its Margin: A Volume in Honor of George P. Woollard, Geophys. Monogr. Ser., vol. 19, edited by G. P. Woollard et al., pp. 351-368, AGU, Washington, D. C., 1976.
29. O'Reilly, W., Rock and Mineral Magnetism, 220 pp., Chapman and Hall, New York, 1984.
30. Özdemir, Ö., and B. M. Moskowitz, Magnetostriction in aluminum-substituted titanomagnetites, Geophys. Res. Lett., 19, 2361-2364, 1992.
31. Perfit, M. R., and D. J. Fornari, Geochemical studies of abyssal lavas recovered by DSRV Alvin from Eastern Galapagos Rift, Inca Transform, and Ecuador Rift, 2, Phase chemistry and crystallization history, J. Geophys. Res., 88, 10,530-10,550, 1983.
32. Petersen, N., P. Eisenach and U. Bleil, Low temperature alteration of the magnetic minerals in ocean floor basalts, in Deep Drilling Results in the Atlantic Ocean: Ocean Crust, Maurice Ewing Ser., vol. 2, edited by M. Talwani, et al., pp. 169-209, AGU, Washington, D. C., 1979.
33. Prévot, M., and A. Lecaille, Comments on paper by K. D. Klitgord, "Sea-floor spreading: The central anomaly magnetization high", Earth Planet. Sci. Lett., 33, 164-168, 1976.
34. 230Th) disequilibrium, Earth Planet. Sci. Lett., 101, 313-322, 1990.
35. Ryall, P. J. C., and J. M. Ade-Hall, Radial variation of magnetic properties in submarine pillow basalt, Can. J. Earth Sci., 12, 1959-1969, 1975.
36. Scheirer, D. S., and K. C. Macdonald, Variation in cross-sectional area of the axial ridge along the East Pacific Rise: Evidence for the magmatic budget of a fast spreading center, J. Geophys. Res., 98, 7871-7885, 1993.
37. Sempere, J. C., High-magnetization zones near spreading center discontinuities, Earth Planet. Sci. Lett., 107, 389-405, 1991.
38. Sempere, J.-C., L. Kristjansson, H. Schouten, J. R. Heirtzler, and G. L. Johnson, A detailed magnetic study of the Reykjanes Ridge between 63°00′N and 63°40′N, Mar. Geophys. Res., 12, 215-234, 1990.
39. Sinton, J. M., and R. S. Detrick, Mid-ocean ridge magma chambers, J. Geophys. Res., 97, 197-216, 1992.
40. Sinton, J. M., D. S. Wilson, D. M. Christie, R. N. Hey, and J. R. Delaney, Petrologic consequences of rift propagation on oceanic spreading ridges, Earth Planet. Sci. Lett., 62, 193-207, 1983.
41. Sinton, J. M., S. M. Smaglik, J. J. Mahoney, and K. C. Macdonald, Magmatic processes at superfast spreading mid-ocean ridges: Glass compositional variations along the East Pacific Rise 13°-23°S, J. Geophys. Res., 96, 6133-6156, 1991.
42. Steiner, M. B., An investigation of ulvospinel composition and cation migration during maghemitization in Deep Sea Drilling Project Leg 61 titanomagnetites, J. Geophys. Res., 87, 5361-5374, 1982.
43. Stormer, J. C., Jr., The effects of recalculation on estimates of temperature and oxygen fugacity from analyses of multicomponent iron-titanium oxides, Am. Mineral., 68, 586-594, 1983.
44. Urabe, T. et al., The effect of magmatic acitivity on hydrothermal venting along the superfast-spreading East Pacific Rise, Science, 269, 1092-1095, 1995.
45. Vogt, P. R., Amplitudes of oceanic magnetic anomalies and the chemistry of oceanic crust: Synthesis and review of 'magnetic telechemistry', Can. J. Earth Sci., 16, 2236-2262, 1979.
46. Vogt, P. R., and G. R. Byerly, Magnetic anomalies and basalt composition in the Juan de Fuca-Gorda Ridge area, Earth Planet. Sci. Lett., 33, 185-207, 1976.
47. Vogt, P. R., and J. DeBoer, Morphology, magnetic anomalies and basalt magnetization at the ends of the Galapagos high-amplitude zone, Earth Planet. Sci. Lett., 33, 145-163, 1976.
48. Vogt, P. R., and G. L. Johnson, Magnetic telechemistry of oceanic crust?, Nature, 245, 373-375, 1973.
49. Walker, D., T. Shibata, and S. E. DeLong, Abyssal tholeiites from the Oceanographer fracture zone, Contrib. Mineral. Petrol., 70, 111-125, 1979.
50. Watkins, N. D., Magnetic telechemistry is elegant but nature is complex, Nature, 251, 497-498, 1974.
51. Weiland, C. M., K. C. Macdonald, and N. R. Grindlay, Ridge segmentation and the magnetic structure of the Southern Mid-Atlantic Ridge 26°S and 31°-35°S: Implications for magmatic processes at slow spreading centers, J. Geophys. Res., 101, 8055-8073, 1996.
52. Wilson, D. S., and R. N. Hey, History of rift propagation and magnetization intensity for the Cocos-Nazca spreading center, J. Geophys. Res., 100, 10,041-10,056, 1995.