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Abstract:

Paleomagnetic and sedimentological studies carried out on two short cores and nine long cores from the bottom sediments from Escondido Lake (south-western Argentina) are described. Rock magnetic analysis suggests that the main carriers of magnetization seems to be ferrimagnetic minerals, predominantly pseudo single domain magnetite. The presence of greigite, as diagenetic euxinic material, is also suggested. Calibrated ages were calculated from radiocarbon dating and a transfer function shortened depth-age is built, which suggests the existence of a hiatus, supported by the suggestion of previous palynological studies about the possible evidence of the younger Dryas cooling event seen in the Antarctic ice cores. The stacked inclination and declination curves and their standard deviations using arithmetical average after chronostratigraphic correlations are made. Inclination data show two well defined periods: a long period (about 7700 years) and a short one (between 2660 and 2900 years). Declination data show two intermediate periods (about 3600 and 2900 years respectively) and a long, although less reliable, period (about 10000 years). The longer periods may be related to dipolar variations, while the shorter periods may be associated to non dipolar variations.

Registro:

Documento: Artículo
Título:Holocene geomagnetic secular variations recorded by sediments from Escondido Lake (south Argentina)
Autor:Gogorza, C.S.G.; Sinito, A.M.; Di Tommaso, I.; Vilas, J.F.; Creer, K.M.; Nuñez, H.
Filiación:IFAS-UNCPBA, Pinto 399, 7000 Tandil, Argentina
Laboratorio Daniel Valencio-UBA, Ciudad Universitaria, Pab 2, 1428, Buenos Aires, Argentina
Department of Geology and Geophysics, University of Edinburgh, West Main Road, Edinburgh EH9 3JW, United Kingdom
Instituto Antartico Argentina, Cerrito 1248, Buenos Aires, Argentina
CONICET, Rivadavia 1917, 1033, Buenos Aires, Argentina
Palabras clave:Holocene; lacustrine deposit; paleomagnetism; secular variation; Argentina; Escondido Lake
Año:1999
Volumen:51
Número:2
Página de inicio:93
Página de fin:106
DOI: http://dx.doi.org/10.1186/BF03352214
Título revista:Earth, Planets and Space
Título revista abreviado:Earth Planets Space
ISSN:13438832
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13438832_v51_n2_p93_Gogorza

Referencias:

  • Bretthorst, G.L., Bayesian spectrum analysis and parameter estimation (1988) Lecture Notes in Statistics, 48. , edited by J. Berger, S. Fienberg, J. Gani, K. Krickeberg, and B. Singer, Springer-Verlag, New York
  • Bretthorst, G.L., Bayesian analysis. I. Parameter estimation using quadrature NMR models (1990) J. Magn. Reson., 88, pp. 533-551
  • Bretthorst, G.L., Bayesian analysis. II. Model selection (1990) J. Magn. Reson., 88, pp. 552-570
  • Bretthorst, G.L., Bayesian analysis. III. Applications to NMR signal detection, model selection and parameter estimation (1990) J. Magn. Reson., 88, pp. 571-595
  • Creer, K.M., Tucholka, P., The shape of the geomagnetic field through the last 8,500 years over part of the northern hemisphere (1982) J. Geophys., 51, pp. 188-198
  • Creer, K.M., Tucholka, P., On the current state of lake sediment paleomagnetic research (1983) Geophys. J. of the R.A.S., 74 (1), pp. 223-238
  • Creer, K.M., Valencio, D.A., Sinito, A.M., Tucholka, P., Vilas, J.F., Geomagnetic secular variations 0-14000 yr BP as recorded by lake sediments from Argentina (1983) Geophys. J. Roy. Astr. Soc., 74 (1), pp. 109-222
  • Dankers, P.H.M., (1978) Magnetic Properties of Dispersed Natural Iron-oxides of Known Grain-size, , Ph.D. Thesis, Rijksuniversiteit te Utrecht, 143 pp
  • Day, R., Fuller, M., Schmidt, V.A., Hysteresis properties of titanomagnetites: Grain size and compositional dependence (1977) Phys. Earth Planet. Int., 13, pp. 260-267
  • Dekkers, M.J., (1988) Some Rock Magnetic Parameters for Natural Goethite, Pyrrhotite and Fine-grained Hematite, , Ph.D. Thesis, State University Utrecht, 231 pp
  • Feruglio, E., Nota preliminar sobre la hoja 40b, San Carlos de Bariloche (1941) Boletín Informaciones Petroleras, 18 (200), pp. 26-64
  • Gogorza, C.S., Di Tommaso, I., Sinito, A.M., Jackson, B., Nuñez, H., Creer, K.M., Vilas, J.F., Preliminary results from paleomagnetic records on lake sediments from South America (1998) Studia of Geophys. et Geodet., 42, pp. 12-29
  • González-Bonorino, F., (1973) Geología del Área Entre San Carlos de Bariloche Y Llao-Llao, , Departamento Recursos Naturales y Energía Fundación Bariloche, Public., 16
  • González-Bonorino, F., Esquema de la evolución geológica de la cordillera nordpatagónica (1979) Asoc. Geol. Arg. Rev., 34 (3), pp. 184-202
  • González-Díaz, E., Nullo, F., Cordillera neuquina (1980) Geología Regional Argentina, 2, pp. 1099-1147. , Academia Nacional de Ciencias de Córdoba
  • Hagee, V.L., Olson, P., An analysis of paleomagnetic secular variation in the Holocene (1989) Phys. Earth Planet. Int., 56, pp. 266-284
  • Hallam, D.F., Maher, B.A., A record of reversed polarity carried by the iron sulphide greigite in British early Pleistocene sediments (1993) Earth Planet. Sci. Lett., 121, pp. 71-80
  • Heller, F., Liu, X.M., Liu, T.S., Xu, T.C., Magnetic susceptibility of loess in China (1991) Earth Planet. Sci. Lett., 103, pp. 301-310
  • Home, J.H., Baliunas, S.L., A prescription for period analysis of unevenly sampled time series (1986) Astrophys. J., 302, pp. 757-763
  • Jackson, B.M., (1996) Paleoenvironmental Record from Lago Escondido, Rio Negro Province, Argentina, , Thesis, University of Wisconsin, 136 pp
  • Kane, R.P., Periodicities in the time-series of geomagnetic inclination during the last 9000 years, recorded in sediment cores from Lake Kasumigaura, Japan (1989) J. Geomag. Geoelectr., 41, pp. 525-532
  • Mackereth, F.J.H., A portable core sampler for lake deposits (1958) Limnol. Oceanogr., 3, pp. 181-191
  • Mackereth, F.J.H., A short core sampler for sub-aqueous deposits (1969) Limnol. Oceanogr., 14, pp. 145-151
  • Meynadier, L., Valet, J.P., Weeks, R., Shackleton, N.J., Hagee, V.L., Relative geomagnetic intensity of the field during the last 140 ka (1992) Earth Planet. Sci. Lett., 114, pp. 39-57
  • Peng, L., King, J.W., A late quaternary geomagnetic secular variation record from Lake Waiau, Hawaii, and the question of the pacific nondipole low (1992) J. Geophys. Res., 97 (B4), pp. 4407-4424
  • Reynolds, R.L., Tuttle, M.L., Rice, C.A., Fishman, N.S., Karachewski, J.A., Sherman, D.M., Magnetization and geochemistry of greigite-bearing cretaceous strata, North Slope basin, Alaska (1994) Am. J. Sci., 294, pp. 485-528
  • Roberts, A.P., Magnetic properties of sedimentary greigite (Fe3S4) (1995) Earth Planet. Sci. Lett., 134, pp. 227-236
  • Roberts, A.P., Turner, G.M., Diagenetic formation of ferrimagnetic iron sulphide minerals in rapidly deposited marine sediments, New Zealand (1993) Earth Planet. Sci. Lett., 115, pp. 257-273
  • Scargle, J.D., Studies in astronomical time series analysis. II. Statistical aspects of spectral analysis of unevenly spaced data (1982) Astrophys. J., 263, pp. 835-853
  • Thompson, R., Oldfield, F., (1986) Environmental Magnetism, , 225pp., Allen & Unwin Ltd

Citas:

---------- APA ----------
Gogorza, C.S.G., Sinito, A.M., Di Tommaso, I., Vilas, J.F., Creer, K.M. & Nuñez, H. (1999) . Holocene geomagnetic secular variations recorded by sediments from Escondido Lake (south Argentina). Earth, Planets and Space, 51(2), 93-106.
http://dx.doi.org/10.1186/BF03352214
---------- CHICAGO ----------
Gogorza, C.S.G., Sinito, A.M., Di Tommaso, I., Vilas, J.F., Creer, K.M., Nuñez, H. "Holocene geomagnetic secular variations recorded by sediments from Escondido Lake (south Argentina)" . Earth, Planets and Space 51, no. 2 (1999) : 93-106.
http://dx.doi.org/10.1186/BF03352214
---------- MLA ----------
Gogorza, C.S.G., Sinito, A.M., Di Tommaso, I., Vilas, J.F., Creer, K.M., Nuñez, H. "Holocene geomagnetic secular variations recorded by sediments from Escondido Lake (south Argentina)" . Earth, Planets and Space, vol. 51, no. 2, 1999, pp. 93-106.
http://dx.doi.org/10.1186/BF03352214
---------- VANCOUVER ----------
Gogorza, C.S.G., Sinito, A.M., Di Tommaso, I., Vilas, J.F., Creer, K.M., Nuñez, H. Holocene geomagnetic secular variations recorded by sediments from Escondido Lake (south Argentina). Earth Planets Space. 1999;51(2):93-106.
http://dx.doi.org/10.1186/BF03352214