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The remanent magnetizations have been analysed in Cretaceous and Jurassic limestones, and Triassic dolomites, from Eastern and Central Sardinia. Ore microscopy and rock magnetic studies, including the acquisition of isothermal remanent magnetization (IRM) and the behavior of IRM during high temperature treatment, indicated that magnetite and goethite determine the paleomagnetic properties of these carbonate rocks. At all Cretaceous sites the remanences were either too weak or too unstable to be used for a paleomagnetic study. AF and thermal demagnetization were used to isolate the characteristic remanent magnetization (ChRM) in the Jurassic and Triassic samples. Rejection criteria were used to eliminate about one third of these samples because of directional instability, or because only very stable secondary magnetizations associated with goethite were present. For the remaining samples the ChRM direction associated with primary magnetite was extracted with the aid of vector diagrams or vector difference calculations. The ChRM directions are rotated by 70°–90° counterclockwise relative to European directions and by 35°–45° counterclockwise relative to African directions. Part of this results from the 30° microplate rotation of Sardinia in the Miocene. The remainder is due to an earlier phase of microplate rotation which took place in post-Late Jurassic time.
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Alvarez, W. (1973) The application of plate tectonics to the Mediterranean region. In: Implications of continental drift to the Earth sciences, Vol. 2, pp. 893-908. Academic Press, London
Alvarez, W., Cocozza, T. (1974) The tectonics of central eastern Sardinia and the possible continuation of the alpine chain to the south of Corsica. In: Paleogeografia del Terziario sardo nell'ambito del Mediterraneo occidentale. Suppl. ai Rend. Fae. Sci. Univ. Cagliari 43:5-34
Amadesi, E., Cantelli, C., Carloni, G., Rabbi, E. (1960) Ricerche geologiche sui terreni sedimentari del foglio 208-Dorgali. G. Geol. 28:58-87
Argand, E. (1924) La tectonique de l'Asie. 13th International Geological Congress (Brussels) pp. 171-372
Arthaud, F., Matte, P. (1976) Arguments geologiques en faveur de l'absence de mouvements relatifs de la Corse par rapport a la Sardaigne depuis l'orogenese hercynienne. C. R. Acad. Sci. Paris 283:1011-1014
Arthaud, F., Matte, P. (1977) Determination de la position initiale de la Corse et de la Sardaigne a la fin de l'orogenese hercynienne grace aux marqueurs geologiques ante-mesozoiques. Bull. Soc. Geol. Fr. 19:833-840
Bellon, H., Coulon, C., Edel, J.B. (1977) Le deplacement de la Sardaigne. Synthese des donnees geochronologiques, magmatiques et paleomagnetiques. Bull. Soc. Geol. Fr. 19:825-832
Berner, R.A. (1969) Goethite stability and the origin of red-beds. Geochim. Cosmochim. Acta 33:267-273
Bullard, E.C., Everett, J.E., Smith, G.A. (1965) The fit of the continents around the Atlantic. In: A symposium on Continental Drift. Philos. Trans. R. Soc. London Ser. A. 258:41-51
Chabrier, G. (1969) Sur la stratigraphie et la structure des monts d'Oliena (Sardaigne orientale). C.R. Somm. Seances Soc. Geol. Fr. 6:218-220
Chabrier, G., Mascle, G. (1975) Comparaison des evolutions geologiques de la Provence et de la Sardaigne (a partir d'exemples de la region Toulonnaise et de la Nurra Sarde). Rev. Geogr. Phys. Geol. Dyn. 17:121-136
Channell, J.E.T., D'Argenio, B., Horvath, F. (1979) Adria, the African promontory in Mesozoic Mediterranean palaeogeography. Earth Sci. Rev. 15:213-292
Channell, J.E.T., Horvath, F. (1976) The African/Adriatic promontory as a palaeogeographical premise for Alpine orogeny and plate movements in the Carpatho-Balkan region. Tectonophysics 35:71-101
Cherchi, A., Schroeder, R. (1973) Sur la biogeographie de l'association Valserina du Barremien et la rotation de la Sardaigne. C. R. Acad. Sci. Paris 277:829-832
Cherchi, A., Schroeder, R. (1976) Presence de galets du Vraconien superieurCenomanien basal de provenance iberique dans le Paleogene continental du Sud-Ouest de la Sardaigne. Bull. Soc. Geol. Fr. 18:1217-1219
Cocozza, T., Jacobacci, A. (1975) Geological outline of Sardinia. In: Squyres, C. (Ed.) Geology of Italy, pp. 49-81. Earth Sci. Soc. Lybian Arab Republic, Tripoli
Cocozza, T., Jacobacci, A., Nardi, R., Salvadori, I. (1974) Schema stratigrafico-strutturale del Massiccio Sardo-Corso e minerogenesi della Sardegna. Mem. Soc. Geol. Ital. 13:85-186
Damiani, A.V., Gandin, A. (1974) Geologia e ambiente di sedimentazione della successione triassica di Monte Maiore (Sardegna centrale). Note II. Boll. Soc. Geol. Ital. [Suppl.] 92:41-83
Dieni, I., Massari, F. (1966) I foraminiferi del Valanginiano superiore di Orosei (Sardegna). Paleontol. Ital. 61:75-186
Dieni, I., Massari, F. (1970) Tettogenesi gravitativa di eta oligocenica nella Sardegna centro-orientale. Boll. Soc. Geol. Ital. 89:57-64
Edel, J.-B. (1979) Palaeomagnetic study of the Tertiary volcanics of Sardinia. J. Geophys. 45:259-280
Edel, J.-B., Lortscher, A. (1977) Paleomagnetisme du volcanisme tertiaire de Sardaigne. Nouveaux resultats et synthese. Bull. Soc. Geol. Fr. 19:815-824
Fisher, R.A. (1953) Dispersion on a sphere. Proc. R. Soc. London, Ser. A: 217:295-305
Hedley, I. (1971) The weak ferromagnetism of goethite (Alpha-FeOOH). J. Geophys. 37:409-420
Heiniger, C., Heller, F. (1976) A high temperature vector magnetometer. Geophys. J. R. Astron. Soc. 44:281-288
Heller, F. (1977) Palaeomagnetism of Upper Jurassic limestones from Southern Germany. J. Geophys. 42:475-488
Heller, F. (1978) Rock magnetic studies of Upper Jurassic limestones from Southern Germany. J. Geophys. 44:525-543
Irving, E. (1977) Drift of the major continental blocks since the Devonian. Nature 270:304-309
Irving, E., Tanczyk, E., Hastie, J. (1976a) Catalogue of paleomagnetic directions and poles. Third issue. Paleozoic results 1949-1975. Energy, Mines and Resources, Canada, Geomagnetic Series, Nr. 5, Ottawa
Irving, E., Tanczyk, E., Hastie, J. (1976b) Catalogue ofpaleomagnetic directions and poles. Fourth issue. Mesozoic results 1954-1975 and results from seamounts. Energy, Mines and Resources, Canada, Geomagnetic Series No. 6, Ottawa
Irving, E., Tanczyk, E., Hastie, J. (l976c) Catalogue of paleomagnetic directions and poles. Fifth issue. Cenozoic results 1927-1975. Energy, Mines and Resources, Canada, Geomagnetic Series Nr. 10, Ottawa
Lowrie, W., Channell, J.E.T., Heller, F. (1980) On the credibility of remanent magnetization measurements. Geophys. J. R. Astron. Soc. 60:493-496
Manzoni, M. (1974) Un interpretazione dei dati paleomagnetici del Terziario dell Sardegna ed alcuni nuovi resultati. In: Paleogeografia del Terziario sardo nell'ambito del Mediterraneo occidentale. Suppl. ai Rendiconti del Seminario della Faculta di Scienze dell'Universita di Cagliari, 283-295
Manzoni, M., Ferriani, A. (1976) Trattamento statistico e validita dei dati paleomagnetici delle vulcaniti Terziarie della Sardegna. Boll. Soc. Geol. Ital. 95:1263-1281
Nairn, A.E.M., Westphal, M. (1968) Possible implications of the palaeomagnetic study of late Palaeozoic igneous rocks of northwestern Corsica. Palaeogeogr. Palaeoclimatol. Palaeoecol. 5:179-204
Sclater, J.G., Hellinger, S., Tapscott, C. (1977) The paleobathymetry of the Atlantic ocean from the Jurassic to the present. J. Geol. 85:509-552
Smith, A.G., Hallam, A. (1970) The fit of the southern continents. Nature 225:139-144
Storetvedt, K.M., Markhus, L.A. (1978) Multivectorial magnetization in late Palaeozoic volcanics from North Sardinia; partial remagnetization and rotation. Geophys. J. R. Astron. Soc. 53:245-258
Storetvedt, K.M., Petersen, N. (1976) Postulated rotation of Corsica not confirmed by new palaeomagnetic data. J. Geophys. 42:59-71
VandenBerg, J. (1979) Paleomagnetism and the changing configuration of the Western Mediterranean area in the Mesozoic and Early Cenozoic eras. Geol. Ultriectina 20, 178 pp.
Van der Voo, R., French, R.B. (1974) Apparent polar wandering for the Atlantic-bordering continents: Late Carboniferous to Eocene. Earth Sci. Rev. 1O:99-119
Van der Yoo, R., Lowrie, W. (1979) A preliminary magnetic study of Jurassic limestones from the Swiss Jura mountains and adjacent areas (abstract). EoS, Trans. AGU 60:569
Westphal, M., Bardon, C., Bossert, A., Hamzeh, R. (1973) A computer fit of Corsica and Sardinia against southern France. Earth Planet. Sci. Lett. 18:137-140
Westphal, M., Orsini, J., Vallutini, P. (1976) Le microcontinent corso-sarde, sa position initiale: donnees paleomagnetiques et raccords geologiques. Tectonophysics 30:141-157
Zijderveld, J.D.A., De Jong, K.A., Van der Yoo, R. (1970) Rotation of Sardinia: Paleomagnetic evidence from Permian rocks. Nature 226:933-934