Evidence from the asymmetry of fast-spreading ridges that the axial topographic high is due to extensional stresses

Nature

Volumn 394, Issue 6691, 1998, Pages 360-363

  Eberle, Michael A ^a,b   Forsyth, Donald W ^a  

^a BROWN UNIVERSITY   (United States)

^b UNIVERSITÉ DE NANTES   (France)

Author keywords

[No Author keywords available]

Indexed keywords

ASYMMETRY; EXTENSION; MID-OCEAN RIDGE; SPREADING CENTER; STRESS; TOPOGRAPHY;

ARTICLE; GEOLOGY; PHYSICAL STRESS; PRIORITY JOURNAL; SEA;

EID: 0032560738     PISSN: 00280836     EISSN: None     Source Type: Journal    
DOI: 10.1038/28596     Document Type: Article

References (15)

1. Wilson, D. S. Focused upwelling beneath mid-ocean ridges: Evidence from seamount formation and isostatic compensation of topography. Earth Planet. Sci. Lett. 113, 41-55 (1992).
2. Wang, X. & Cochran, J. R. Gravity anomalies, isostasy, and mantle flow at the East Pacific Rise crest. J. Geophys. Res. 98, 19505-19531 (1993).
3. Magde, L. S. et al. Crustal and upper mantle contribution to the axial gravity anomaly at the southern East Pacific Rise. J. Geophys. Res. 100, 3747-3766 (1995).
4. Eberle, M. A., Forsyth, D. W. & Parmentier, E. M. Constraints on a buoyant model for the formation of the axial topographic high on the East Pacific Rise. J. Geophys. Res. 103, 12291-12307 (1998).
5. Eberle, M. A. & Forsyth, D. W. An alternative, dynamic model of the axial topographic high at fast-spreading ridges. J. Geophys. Res. 103, 12309-12320 (1998).
6. Buck, W. R. & Su, W. Focused mantle upwelling below mid-ocean ridges due to feedback between viscosity and melting. Geophys. Res. Lett. 16, 641-644 (1989).
7. Scott, D. R. & Stevenson, D. J. A self-consistent model of melting, magma migration and buoyancy-driven circulation beneath mid-ocean ridges. J. Geophys. Res. 94, 2973-2988 (1989).
8. Sotin, C. & Parmentier, E. M. Dynamical consequences of compositional and thermal density stratification beneath spreading centers. Geophys. Res. Lett. 16, 835-838 (1989).
9. Su, W. & Buck, W. R. Buoyancy effects on mantle flow under mid-ocean ridges. J. Geophys. Res. 98, 12191-12205 (1993).
10. Gripp, A. E. & Gordon, R. G. Current plate velocities relative to the hotspots incorporating the NUVEL-1 global plate motion model. Geophys. Res. Lett. 17, 1109-1112 (1990).
11. Cormier, M.-H. & Macdonald, K. C. East Pacific Rise 18-19°S: Asymmetric spreading and ridge reorientation by ultrafast migration of axial discontinuities. J. Geophys. Res. 99, 543-564 (1994).
12. Cochran, J. R. Variations in subsidence rates along intermediate and fast spreading mid-ocean ridges. Geophys. J. R. Astr. Soc. 87, 421-454 (1986).
13. Forsyth, D. W., Dorman, L. M., Phipps Morgan, J. & Shen, Y. Anisotropy and lateral variations in shear wave velocity from propagation of Rayleigh waves across the MELT array. EOS Transactions AGU77, 652-653 (1996).
14. Sandwell, D. T. & Smith, W. H. F. Marine gravity anomaly from Geosat and ERS 1 satellite altimetry. J. Geophys. Res. 102, 10039-10054 (1997).
15. Phipps Morgan, J., Parmentier, E. M. & Lin, J. Mechanisms for the origin of mid-ocean ridge axial topography: Implications for the thermal and mechanical structure of accreting plate boundaries. J. Geophys. Res. 92, 12823-12836 (1987).