Table Of Content

CONTENTS Tectonophysics Volume 190 Special issue: The Geology, Geophysics and Metallogeny of the Present-Day Oceans (edited by J. Francheteau, O. Eldholm and P. Miles) PN ik ae 8 wk beats OA Oe a i ee ea ea a eee tha ak oeb nee bea Vil An example of a recent accretion on the Mid-Atlantic Ridge: the Snake Pit neovolcanic ridge (MARK area, 23° 22’N) Gente, P. (Brest, France), Mével, C. (Paris, France), Auzende, J.M. (Plouzané, France), Karson, J.A. (Durham, I ee ee re ee ee 1 Emplacement of deep crustal and mantle rocks on the west median valley wall of the MARK area (MAR, 23°N) Mével, C. (Paris, France), Cannat, M., Gente, P. (Brest, France), Marion, E. (Paris, France), Auzende, J.M. (Plouzané, France) and Karson, J.A. (Durham, N.C., U.S.A.) 2.0... 20.0... eeee e eee eee 31 In-situ study of the eastern ridge-—transform intersection of the Vema Fracture Zone Mamaloukas-Frangoulis, V. (Brest, France), Auzende, J.-M., Bideau, D. (Plouzané, France), Bonatti, E. (Palisades, N.Y., U.S.A.), Cannat, M. (Brest, France), Honnorez, J. (Strasbourg, France), Lagabrielle, Y. (Valbonne, France), Malavieille, J. (Montpellier, France), Mével, C. (Paris, France) and Needham, H.D. (Plouzané, France).......... 55 Stretching of the deep crust at the slow-spreading Southwest Indian Ridge. Cannat, M. (Brest, France), Mével, C. (Paris, France) and Stakes, D. (Columbia, S.C.,U.S.A.) ................ 73 Spinifex basalts with komatiite—tholeiite trend from the Nansen-Gakkel Ridge (Arctic Ocean) MUhe, R.K., Bohrmann, H., HOrmann, P.K., Thiede, J. and Stoffers, P. (Kiel, F.R.G.)....................205. 95 Evidence for episodic hydrothermal activity in the Red Sea from the composition and formation of hydrothermal sediments, Thetis Deep Scholten, J.C., Stoffers, P. (Kiel, F.R.G.), Walter, P. (Heidelberg, F.R.G.) and Pluger, W. (Aachen, F.R.G.) ....... 109 The opening processes in the deep Tyrrhenian basins of Marsili and Vavilov, as deduced from magnetic and chronological evidence of their igneous crust Savelli, C. (Bologna, Italy) and Schreider, A.A. (Moscow, U.S.S.R.) 2... eee ee eee 119 An analysis of the altimetric geoid in various wavebands in the central Pacific Ocean: constraints on the origin of intraplate features a dn a'dl'> aa sie as eb Oa OSCR SAO ONO e aw ee Oe eas Sw ee ee 133 Research Papers Magnetic mapping of the western Alps: compilation and geological implications EPEC CT TCC CTC TCTTUEA CTT TUT CETTE CTT Te Cre 155 Mantle fragments in the Scandinavian Caledonides EE OO ETT eee eT ee ERE TTC CET ETRE CCC TEC TTT CT eee 173 Kinematics of crenulation cleavage development: example from the Upper Devonian rocks from northeast of the Bohemian Massif, Czechoslovakia nn aNd ba le ee dE ESS OO bE CORES TS DOD ESO COS WHOS MORSE EDS Oe OE 193 Kinematics of compressional fold development in convergent wrench terranes EE PIE TT Te TT errr ee ee LTT TET TCT OTE CETTE Te 209 Strain in Archean greenstone belt of Minnesota Schultz-Ela, D.D. and Hudleston, P.J. (Minneapolis, Minn., U.S.A.) 2.2...ee eee 233 Strain analysis using quartz deformation bands Wu, S. (Morgantown, W. Va., U.S.A.) and Groshong, R.H., Jr. (Tuscaloosa, Ala., U.S.A.) ...........-.02-5005- 269 Mapping elastic lithospheric thickness variations in Canada ee ee OD voc a eee ese wee R OK Sees 6 ben eee ewe eee eeeeee sets ce bbew beeen 283 On the effective thermal and hydraulic conductivity of binary heterogeneous sediments ee ee CE 1 seca a cece bee ees ee eee UR Sete bese SresedseSSenererneceseereenee 299 Influence of pre- or post-diapiric deformation on the foliation and strain pattern of a diapiric ridge We ee, ah.0 COND, TORE CUUUIUUNUEINEIED 5g ee cee b eres chee reese reeset seed eceseosscesesegen 315 Plio-Quaternary geodynamic evolution of a segment of the Peruvian Andean Cordillera located above the change in the subduction geometry: the Cuczo region Cabrera, J. (Orsay, France and Lima, Peru), Sébrier, M. and Mercier, J.L. (Orsay, France)................4.. 331 Basic magmatism and geotectonic evolution of the Pan African belt in central Africa: evidence from the Katangan and West Congolian segments Kampunzu, A.B., Kapenda, D. (Marseille, France) and Manteka, B. (Lumbumbashi, Zaire) ................... 390 Biotite percussion figures in naturally deformed mylonites Xu, S. (Hefei, Anhui, P.R. of China) and Ji, S. (Nanjing, Jiangsu, P.R. of China) Short Communication Geomagnetic field reconnaissance in Kuwait Bou-Rabee, F.A. (Kuwait City, Kuwait) and Niazi, M. (Berkeley, Calif. US.A.).............02.000.202020005. 381 Subject Index Volumes 181-190