M. E. Chapman, Techniques for interpretation of geoid anomalies, J. Geophys. Res, vol.84, pp.3793-3801, 1979.

Y. Chen and W. J. Morgan, Riff valley/no rift valley transition at midocean ridges, J. Geophys. Res, vol.95, pp.571-588, 1990.

Y. Chen and W. J. Morgan, A nonlinear rheology model for mid-ocean ridge axis topography, J. Geophys. Res, vol.95, pp.583-600, 1990.

J. F. Claerbout, Imaging the Earth's interior, 1985.

O. Dauteuil and J. P. Brun, Oblique rifting in a slow-spreading ridge, Nature, vol.361, pp.145-148, 1993.

R. S. Detrick, Ridge erest magma chambers: a review of results from recent marine seismic experiments, Ophiolites-Genesis and Evolution of the Oceanic Lithosphere, 1991.

R. S. Detrick, J. C. Mutter, P. Buhl, 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, vol.347, pp.61-64, 1990.

O. Eiken, Seismic-Reflecfion profiling along Mohns Ridge spreading ridge, Norwegian-Greenland Sea, $eismo $er, vol.59, 1991.

V. V. Fedhynskii, A. I. Rassokho, R. M. Demenitsikaya, A. M. Karasik, and S. S. Rozhdestvenskii, O strikture anomalhnogo magnitnogo polya yugo-zapadnoi chasfi khrebta Mona, Dokl. Akad. Nauk. $$$R, vol.223, pp.726-729, 1975.

C. M. Fowler and C. E. Keen, Oceanic crustal structure Mid-Atlantic Ridge at 45øN, Geophys. J. R. Astron. $oc, vol.56, pp.219-226, 1979.

L. Gtli, Volcano-tectonic events and sedimentation since Late Miocene times at the Mohns Ridge, near 72øN, the Norwegian Greenland Sea, vol.222, pp.417-444, 1993.

G. Gronlie and M. Talwani, The free air gravity field of the Norwegian-Greenland Sea and adjacent areas, Earth Evol.$c, vol.2, pp.74-103, 1982.

J. R. Heirtzler and X. Le-pichon, The structure of mid-ocean ridges and magnetic anomalies over the Mid-Atlanfie Ridge, J. Geophys. Res, vol.70, pp.4013-4033, 1965.

H. Hirschleber, F. Theilen, W. Balzer, B. V. Bodungen, and J. Thiede, Beriehte au dem Sonderforsehungsbereieh 313, Sedimentation im Europ?iischen Nordmeet, vol.7, 1988.

H. Inoue, A least-squares smooth fitting for irregularly spaced data: Finite-element approach using the cubic B-spline basin, Geophysics, vol.51, pp.2051-2061, 1986.

H. P. Johnson and T. M. Atwater, Magnetic study of basalts from the Mid-Atlantic Ridge, Geol. Soc. Am Bull, vol.88, pp.637-647, 1977.

B. Y. Kuo and D. W. Forsyth, Gravity anomalies of the ridgetransform system in the South Atlantic between 31 and 34,5øS: Upwelling centers and variations in crustal thickness, Mar. Geophys. Res, vol.10, pp.205-232, 1988.

I. Leeomte, Structure crustale d'une dotsale lente: Tomographie sismique 3D sur la dotsale de Mohn (72ø20N, lø30E), 1990.

J. Lin, G. M. Purdy, H. Schouten, J. C. Semptrt, and C. Zervas, Evidence from gravity data for focused magmafie accretion along the Mid-Atlanfic Ridge, Nature, vol.344, pp.627-632, 1990.

K. C. Macdonald, Mid-ocean ridges: Fine scale tectonic, volcanic and hydrothermal processes at the plate boundary zone, Annu. Rev. Earth Planet. $ci, vol.10, pp.155-190, 1982.

K. C. Macdonald, S. P. Miller, S. P. Huesfis, and F. N. Spiess, Threedimensional modeling of a magnetic reversal boundary from inversion of deep-tow measurements, J. Geophys. Res, vol.85, pp.3670-3680, 1980.

E. Neumann and J. G. Schilling, Petrology of basalts from the Mohns-Knipovich Ridge: The Norwegian-Greenland Sea, Contrib. Mineral Petrol, vol.85, pp.204-233, 1984.

I. Olavsson, L. G61i, and B. E. Roed, Multichannel seismic reflecfion profile across Mohns Ridge, Norwegian-Greenland Sea, $eismo-$er, vol.20, 1988.

R. L. Parker, S. P. Huestis, B. Parsons, and J. G. Sclater, An analysis of the variation of ocean floor bathymetry and heat flow with age, J. Geophys. Res, vol.79, pp.803-827, 1974.

P. Patriat, Evolution du syst?me de dorsale de l'octan Indien, p.308, 1985.

R. K. Perry, M. Prtvot, A. Lecaille, and R. Htkinian, Magnetism of the Mid-Atlantic Ridge crest near 37øN from Famous and DSDP results: A review, Deep Drilling Results in the Atlantic Oceanic Crust, vol.2, pp.210-229, 1979.

V. Renard, F. Avedik, L. G61i, I. Lecomte, J. P. Le-formal et al.,

. Nercessian, Characterisitics of oceanic crust formation of a part of Mohns Ridge, near 72øN, in the Norwegian-Greenland Sea,. Part I, Morphological study and underway geophysics (abstract), 1989.

B. Roed, Geophysical investigafions in the Mohns Ridge Area, Candidate Sci. thesis (in Norwegian), 89 pp., Seismol. Ohs. Univ. of, 1989.

C. Rommevaux, C. Deplus, and P. Patriat, Thre-dimensional gravity study of the Mid-Atlantic Ridge: Evolution of the segmentation between 28 ø and 29øN during the last 10 m.y, J. Geophys. Res

H. Schouten, K. D. Klitgord, and J. A. Whitehead, Segmentation of midocean ridges, Nature, vol.317, pp.225-229, 1985.

R. C. Searle and A. S. Laugton, Fine scale sonar study of tectonics and volcanism on the Reykjanes Ridge, Oeeanologiea Acta, vol.4, pp.5-13, 1981.

J. C. Semptrt, G. M. Purdy, and H. Schouten, Segmentation of the Mid-Atlantic Ridge between 24øN and 30ø40'N, Nature, vol.344, pp.427-431, 1990.

J. M. Simon and R. S. Detrick, Mid-ocean ridge magma chambers, J. Geophys. Res, vol.97, pp.197-216, 1992.

N. H. Sleep, Sensitivity of heat flow and gravity to the mechanism of seafloor spreading, J. Geophys. Res, vol.74, pp.542-549, 1969.

M. Talwani and O. Eldholm, Evolution of the Norwegian Greenland Sea, Geol. $oc. As Bull, vol.88, pp.969-999, 1977.

M. Talwani, J. Worzel, and M. Landisman, Rapid gravity computafons for two-dimensional bodies with application to the Mendocino submarine fracture zone, J. Geophys. Res, vol.64, pp.49-59, 1959.

M. Talwani, C. C. Windisch, and M. G. Langseth, Reykjanes ridge crest: a detailed geophysical study, J. Geophys. Res, vol.76, pp.473-517, 1971.

P. Tapponnier and J. Francheteau, Necking of the lithosphere and the mechanics of slowly accreting plate boundaries, J. Geophys. Res, vol.83, pp.3955-3970, 1978.

D. R. Toomey, S. C. Solomon, and G. M. Purdy, Microearthquakes beneath median valley of Mid-Atlantic Ridge near 23øN: Hypocenters and focal mechanisms, J. Geophys. Res, vol.93, pp.9093-9112, 1985.

P. R. Vogt, Geophysical and geochemical signatures and plate tectonics, The Nordic Seas, pp.413-662, 1986.

P. R. Vogt, L. C. Kovacs, C. Bernero, and S. P. Srivastava, Asymmetric geophysical signatures in the Greenland-Norwegian and southern Labrador seas and the Eurasia Basin, Tectonophysics, vol.89, pp.95-150, 1982.

P. Wessel and A. B. Watts, On the accuracy of marine gravity measurements, J. Geophys. Res, vol.93, pp.393-413, 1988.

R. B. Whitmarsh, Median valley refraction line: Mid-Atlantic Ridge at 37øN, Nature, vol.246, pp.297-299, 1973.

L. Gtli, V. Renard, F. C. Cedex, and . Rommevaux, Dtpartement des G6osciences Marines, vol.70, p.6, 1992.