Composite magnetic fabrics and S-C structure in granitic gneiss of Cerro de los Viejos, La Pampa province, Argentina
The Cerro los Viejos gneiss, in La Pampa Province, Argentina, is a mylonitized granite which lies along the late Paleozoic deformed boundary zone between the Patagonia block and 'mainland' Gondwana to the north. Petrofabric and anisotropy of magnetic susceptibility (AMS) analyses were comp...
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2002
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| LEADER | 10170caa a22009257a 4500 | ||
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| 001 | PAPER-5168 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518203447.0 | ||
| 008 | 190411s2002 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-0036032956 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Tomezzoli, R.N. | |
| 245 | 1 | 0 | |a Composite magnetic fabrics and S-C structure in granitic gneiss of Cerro de los Viejos, La Pampa province, Argentina |
| 260 | |c 2002 | ||
| 270 | 1 | 0 | |m Tomezzoli, R.N.; CONICET, Universidad de Buenos Aires, Dpto. de Ciencias Geológicas, Buenos Aires, Argentina; email: renata@gl.fcen.uba.ar |
| 506 | |2 openaire |e Política editorial | ||
| 504 | |a Aranguren, A., Cuevas, J., Tubía, J.M., Composite magnetic fabrics from S-C mylonites (1996) Journal of Structural Geology, 18, pp. 863-869 | ||
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| 504 | |a Borradaile, G.J., Magnetic susceptibility, petrofabrics and strain (1988) Tectonophysics, 156, pp. 1-20 | ||
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| 504 | |a Borradaile, G.J., Henry, B., Tectonic applications of magnetic susceptibility and its anisotropy (1997) Earth Sciences Review, 42, pp. 49-93 | ||
| 504 | |a Bouchez, J.L., Gleizes, G., Two-stage deformation of the Mont Louis-Andorra granite pluton (Variscan Pyrenees) inferred from magnetic susceptibility anisotropy (1995) Journal of the Geological Society of London, 152, pp. 669-679 | ||
| 504 | |a Du Toit, A., (1927) A Geological Comparison of South America with South Africa, pp. 1-157. , Carnegie Institute of Washington Publications 381, Washington | ||
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| 504 | |a Gleizes, G., Nédélec, A., Bouchez, J.L., Autran, A., Rochette, P., Magnetic susceptibility of the Mount Louis-Andorra ilmenite-type granite (Pyrenees): A new tool for the petrographic characterization and regional mapping of zoned granite plutons (1993) Journal of Geophysical Research, 98, pp. 4317-4331 | ||
| 504 | |a Graham, J.W., Magnetic susceptibility, an unexploited element of petrofabric (1954) Geological Society of American Bulletin, 65, pp. 1257-1258 | ||
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| 504 | |a Kay, S.M., Ramos, V.A., Mpodozis, C., Sruoga, P., Late Paleozoic to jurassic silicic magmatism at the Gondwana margin: Analogy to the Middle Proterozoic in North America? (1989) Geology, 17, pp. 324-328 | ||
| 504 | |a Linares, E., Llambías, E.J., Latorre, C.A., Geología de la Provincia de La Pampa, República Argentina y geocronología de sus rocas metamórficas y cruptivas (1980) Revista de la Asociación Geológica Argentina, 35, pp. 87-146 | ||
| 504 | |a Lister, G.S., Snoke, A.W., S-C mylonites (1984) Journal of Structural Geology, 6, pp. 617-638 | ||
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| 504 | |a Rapalini, A.E., Vizán, H., Evidence of intrapangaea movements in Gondwanaland (1993) Comptes Rendus, 12 (1), pp. 405-434 | ||
| 504 | |a Rochette, P., Magnetic susceptibility of the rock matrix related to magnetic fabric studies (1987) Journal of Structural Geology, 9, pp. 1015-1020 | ||
| 504 | |a Tarling, D.H., Hrouda, F., (1993) The Magnetic Anisotropy of Rocks, , Chapman and Hall, London 217pp | ||
| 504 | |a Tickyj, H., (1999) Estructura y petrología del basamento cristalino de la región centro-sur de la provincia de La Pampa, Argentina, , Tesis Doctoral. Universidad Nacional de La Plata, 228. La Plata. Unpublished | ||
| 504 | |a Tickyj, H., Llambias, E.J., El gneis milonĺtico del Cerro de los Viejos (38°28′S-64°26′O), provincia de La Pampa, Argentina. Evidencia de un corrimiento en el Carbonífero Inferior (1994) 7° Congreso Geológico Chileno, 2, pp. 1239-1243 | ||
| 504 | |a Tickyj, H., Dimieri, L.V., Llambías, E.J., Sato, A.M., Cerro de los Viejos (38° 28′S-64° 26′O): Cizallamiento dúctil en el sudeste de La Pampa (1997) Revista de la Asociación Geológica Argentina, 52 (3), pp. 311-321 | ||
| 504 | |a Tomezzoli, R.N., Further palaeomagnetic results from the Sierras Australes fold and thrust belt, Argentina (2001) Geophysical Journal International, 147, pp. 356-366 | ||
| 504 | |a Tomezzoli, R.N., Vilas, J.F., Palaeomagnetic constraints on age of deformation of the Sierras Australes thrust and fold belt (1999) Geophysical Journal International, 138, pp. 857-870 | ||
| 504 | |a Trindade, R.I.F., Raposo, M.I.B., Ernesto, M., Siqueira, R., Magnetic susceptibility and partial anhysteretic remanence anisotropies in the magnetite-bearing granite pluton of Taurao, NE Brazil (1999) Tectonophysics, 314, pp. 443-468 | ||
| 504 | |a Werner, T., Borradaile, G.J., Paleoremanence by dispersal across a transpressed Archean terrain: Deflection by anisotropy or by late compression? (1996) Journal of Geophysical Research, 101, pp. 5531-5545 | ||
| 520 | 3 | |a The Cerro los Viejos gneiss, in La Pampa Province, Argentina, is a mylonitized granite which lies along the late Paleozoic deformed boundary zone between the Patagonia block and 'mainland' Gondwana to the north. Petrofabric and anisotropy of magnetic susceptibility (AMS) analyses were compared for this body. Unexpectedly, it was found that the Kmin poles deviate from the poles of the main foliation s1 by about 25°. Similarly, but not so noticeably, the Kmax poles trend NE/SW, with a near-horizontal plunge, whereas the principal lineation l1 plunges gently SW. This unusual situation is attributed to the existence of superimposed fabrics arising from S-C structures. Examination of oriented cores in a modified universal stage and of oriented thin-sections revealed that the Kmin poles are clearly associated with a younger but less obvious metamorphic 'C' foliation (s2). Biotite and magnetite, the main contributors to the AMS response, are distributed along both s1 and s2. The dominance of s2 in the AMS anisotropy suggests that magnetite is preferentially distributed on s2. © 2002 Elsevier Science Ltd. All rights reserved. |l eng | |
| 536 | |a Detalles de la financiación: Universidad de Buenos Aires | ||
| 536 | |a Detalles de la financiación: PIP-CONICET 4329/96 | ||
| 536 | |a Detalles de la financiación: This paleomagnetic study is part of an external grant to R.N. Tomezzoli, supported by the CONICET-Argentina and Universidad de Buenos Aires, Departamento de Ciencias Geológicas. W.D. MacDonald acknowledges support through N.S.F. INT-9903915. H. Tickyj's participation was supported by PIP-CONICET 4329/96. Laboratory work was mainly performed at the Department of Geological Sciences, State University of New York at Binghamton, USA. We recognize special debts to E. Cristallini, for his invaluable collaboration during all phases of this work, and G. Bottessi for his collaboration in the field work. A. Goldstein of Colgate University and L. Brown of the University of Massachussets kindly provided access to essential equipment. Drs S. Neves, J. Bouchez and G. Borradaile are acknowledged for suggesting significant improvements to this paper. The computer software Estereográfica-GR (E.O. Cristallini) and APLOT10 modified by: B. Lienert were used in the analyses and graphics. | ||
| 593 | |a CONICET, Universidad De Buenos Aires, Pabellón II C1428EH, Buenos Aires, Argentina | ||
| 593 | |a State University of New York at Binghamton, Department of Geological Sciences, Binghamton, NY 13902-6000, United States | ||
| 593 | |a Universidad Nacional De La Pampa, F.C.E.yN., Departamento De Ciencias Naturales, Av. Uruguay 151, 6300 Santa Rosa, La Pampa, Argentina | ||
| 690 | 1 | 0 | |a ANISOTROPY OF MAGNETIC SUSCEPTIBILITY |
| 690 | 1 | 0 | |a GONDWANA |
| 690 | 1 | 0 | |a GRANITIC GNEISS |
| 690 | 1 | 0 | |a PETROFABRIC |
| 690 | 1 | 0 | |a S-C STRUCTURE |
| 690 | 1 | 0 | |a SUPERIMPOSED FABRICS |
| 690 | 1 | 0 | |a ANISOTROPY |
| 690 | 1 | 0 | |a COMPOSITE MATERIALS |
| 690 | 1 | 0 | |a MAGNETIC SUSCEPTIBILITY |
| 690 | 1 | 0 | |a MAGNETITE |
| 690 | 1 | 0 | |a STRUCTURAL GEOLOGY |
| 690 | 1 | 0 | |a GNEISS |
| 690 | 1 | 0 | |a GONDWANA |
| 690 | 1 | 0 | |a MAGNETIC ANISOTROPY |
| 690 | 1 | 0 | |a MAGNETIC SUSCEPTIBILITY |
| 690 | 1 | 0 | |a PETROFABRIC |
| 690 | 1 | 0 | |a TECTONIC EVOLUTION |
| 651 | 4 | |a ARGENTINA | |
| 651 | 4 | |a ARGENTINA | |
| 700 | 1 | |a MacDonald, W.D. | |
| 700 | 1 | |a Tickyj, H. | |
| 773 | 0 | |d 2002 |g v. 25 |h pp. 159-169 |k n. 2 |p J. Struct. Geol. |x 01918141 |w (AR-BaUEN)CENRE-335 |t Journal of Structural Geology | |
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