Table Of Content

CONTENTS VOLUME 66 Special Issue: High Conductivity Layers in the Crust and Upper Mantle Guest Editors: V.R.S. Hutton and V. Haak Contents Preface Research Papers A review of laboratory measurements of the electrical conductivity of rocks and minerals M. LaStovickova (Prague, Czechoslovakia) Why is the electrical resistivity around the KTB hole so low? V. Hoek, J. Stoll and Fi. Winter (Pr ramkkiurt, FAG.) ww. ccc ccc cw ccevcnceceeevvece Geological noise in magnetotelluric data: a classification of distortion types K. Bahr (Frankfurt, F.R.G.) Deep long-offset transient electromagnetic surveys for crustal studies in the U.S.A. C.K. Skokan and H.T. Andersen (Golden, CO, U.S.A.) Direct current resistivity and LOTEM model for the deep structure of the northern edge of the Kaapvaal craton, South Africa J.H. de Beer, C.L. le Roux (Pretoria, South Africa), T. Hanstein and K.-M. Strack (Cologne, Electrical conductivity structure of the Broadlands—Ohaaki geothermal field, New Zealand M.R. Ingham (Wellington, New Zealand) The Milos geothermal field: modelling and interpretation of electromagnetic induction studies D. Galanopoulos, V.R.S. Hutton and G.J.K. Dawes (Edinburgh, U.K.) A magnetovariational study in Sardinia R. Balia (Cagliari, Italy), E. Bozzo, A. Elena, G. Ghezzi (Genoa, Italy), A. De Santis, A. Meloni (Rome, Italy) and G. Ranieri (Turin, Italy) The Rio Grande rift: new electromagnetic constraints on the Socorro magma body J.F. Hesmence and G.A. Nowumann (Provademos, RI, US.A.).. .. 2... 2. ccc ccc ccs wnnecne Magnetovariational study over a seismically active area in the Deccan Trap province of western India B.R. Arora and C.D. Reddy (Bombay, India) Letter Section Centroid-moment tensor solutions for April-June 1990 A.M. Dziewonski, G. Ekstrém, J.H. Woodhouse and G. Zwart (Cambridge, MA, USA) Research Papers Low-temperature demagnetization of saturation remanence in rocks bearing multidomain magnetite J.P. Hodych (St. John’s, Nfld., Canada) Computation of elastic parameters of anisotropic medium from travel times of quasi-compressional waves J. Jech (Prague, Czechoslovakia) 340 Global Love wave phase velocity variation and its significance to plate tectonics Y.-S. Zhang and T. Tanimoto (Pasadena, CA, USA) P-wave velocity structure inside the subducting Pacific plate beneath the Japan region T. lidaka and M. Mizoue (Tokyo, Japan) The interplate coupling and stress accumulation process of large earthquakes along the Nankai trough, southwest Japan, derived from geodetic and seismic data S. Yoshioka (Kyoto, Japan) Effect of a sedimentary basin on estimations of Q. and Q,, J.M. Ibaitez, J. Morales, F. de Miguel, F. Vidal, G. Alguacil and A.M. Posadas (Granada, Spain) . Source parameters of the 22 December 1964 (m, = 5.4, M, = 6.2) offshore Ensenada earthquake F.J. Cruces and C.J. Rebollar (Ensenada, Mexico) Some results of gradient electromagnetic sounding in Doldrums Mid-Atlantic Ridge fracture V.S. Shneyer, I.L. Trofimov, Yu.M. Abramov, M.S. Zhdanov, V.A. Machinin and S.V. Shabelyan- sky (Troitsk, USSR) The faulting process of Tangshan earthquake inverted simultaneously from the teleseismic wave- forms and geodesic deformation data X.-B. Xie and Z.-X. Yao (Beijing, People’s Republic of China) Quasi-static response of a layered viscoelastic half-space to general surface loading Z.-Y. Ding and Y.-Q. Shen (Beijing, People’s Republic of China) Effects of a transition zone on free oscillations of the Earth E. Mochizuki (Tokyo, Japan) Stress fields and tectonic motions induced by time-varying density anomalies in the lithosphere G. Spada and R. Sabadini (Bologna, Italy) Stability of hydrous magnesium silicates in the mantle transition zone M. Kanzaki (Edmonton, Alta., Canada) Study of the mechanism of the influence of water on elastic wave propagation in amphibolites and some metamorphic rocks at high pressures and temperatures E.B. Lebedev, A.M. Dorfman and S.R. Zebrin (Moscow, USSR) Heat flow data from the western margin of the West African craton (Mauritania) A. Lesquer (Montpellier, France), J.C. Villeneuve (Dakar, Senegal) and G. Bronner (Marseille, France) Book Reviews Proceedings of the Nineteenth Lunar and Planetary Science Conference by G. Ryder and V.L. Sharpton (Editors)—G. Turner Geophysical Geodesy: The Slow Deformations of the Earth by K. Lambeck— Clyde C. Goad Geology of the Higher Central Himalaya by A.K. Sinha—J. Pearce IAU Colloquium 105: The Teaching of Astronomy by J.M. Pasachoff and 5.R. Percy (Editors)—D.G. McCartan Climate-Ocean Interaction by M.E. Schlesinger (Editor)—F.W. Taylor Northwest European Micropalaeontology and Palynology by D.J. Batten and M.C. Keen (Editors)—J. Margins: A Research Initiative for Interdisciplinary Studies of Processes Attending Lithospheric Extension and Convergence—J.F. Dewey Errata