Artículo
Orgeira, M.J. "Environmental magnetism: Loess and nalaeosols of the Buenos Aires Formation (Province of Buenos Aires) " (1998) Revista de la Asociacion Geologica Argentina. 53(1):91-100
Estamos trabajando para incorporar este artículo al repositorio
Consulte la política de Acceso Abierto del editor
Abstract:
Dia-genetic and/or pedogenetic processes produce ferromagnetic phases and/or the dissolution of magnetic minerals. The identification of these magnetic minerals, their grain size and variations through a sedimentary profile enable the determination of the climatic changes that took place during deposition. The results presented here were obtained from a 7.6 m thick profile of typical loess (Buenos Aires Formation, Brunhes magnetic age) located beneath the city of Buenos Aires (Cervino street). On the basis of the variation of the magnetic properties [susceptibilities, isothermal rémanent magnetization (IRM), coercivity of the remanence (Bcr), rémanent acquisition coercive force (H'cr), Sratio, saturation isothermal rémanent magnetization (SIRM), low temperature properties, coercivity force (Be), and magnetization of saturation (Ms), among others] a decrease of ferrimagnetic (magnetite), and an increase of antiferromagnetic (goethite) minerals was observed in the palaeosol levels of the outcrop. Similar magnetic variations were detected in some others levels of the profile, previously not related to palaeosol formation. © 1998 Asociaciön Gcolögica Argentina.
Registro:
| Documento: | Artículo |
| Título: | Environmental magnetism: Loess and nalaeosols of the Buenos Aires Formation (Province of Buenos Aires) |
| Autor: | Orgeira, M.J. |
| Filiación: | Facultad de Ciencias Exactas Y Naturelles, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina |
| Palabras clave: | loess; magnetic property; paleosol; Argentina |
| Año: | 1998 |
| Volumen: | 53 |
| Número: | 1 |
| Página de inicio: | 91 |
| Página de fin: | 100 |
| Título revista: | Revista de la Asociacion Geologica Argentina |
| Título revista abreviado: | Rev. Asoc. Geol. Argent. |
| ISSN: | 00044822 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v53_n1_p91_Orgeira |
Referencias:
- Banerjee, S.K., Hunt, O.P., Liu, X.-M., Separation of local signals from the regional paleomonsoon record of the Chinese loess plateau: A rock-magnetic approach (1993) Geophysical Research Letters, 20 (9), pp. 843-846
- Dankers, P.H.M., Magnetic properties of dispersed natural iron-oxides of known grain-size (1978) Tesis Doctoral Rijksuniversi-teit Te Utrecht, Netherlands, p. 143. , (Inédito)
- Day, R., Fuller, M., Schmidt, V.A., Hysteresis properties of titanomagnetites: Grain-size and compositional dépendance (1977) Physics of the Earth and Planetary Interiors, 13, pp. 260-267. , Amsterdam
- Duchaufour, P., Precis de Pédologie (1975) Masson Et Cie., Editeurs, Paris VI, France.
- Halgedahl, S.L., Jarrard, R.D., Low-temperature behavior of single-domain through multidomain magnetite (1995) Earth and Planetary Science Letters, 130, pp. 127-139. , Amsterdam
- Heller, F., Xiuming, L., Tungsheng, L., Tbngchun, X., Magnetic susceptibility of loess in China (1991) Earth and Planetary Science Letters, 103, pp. 301-340. , Amsterdam
- Hunt, C.P., Banerjee, S.K., Han, J., Solheid, P.A., Oches, E., Sun, W., Liu, T., Rock-magnetic proxies of climate change in the loess-paleosol sequences of the western Loess Plateau of China (1995) Geophysical Journal International, 123, pp. 232-244. , London
- Rung, J.W., Channel, J.E.T., Sedimentary magnetism, environmental magnetism, and magnetostratigraphy (1991) U.S. National Report IUGG 1987-1990. Review of Geophysics, 29, pp. 358-370. , Washington
- Mäher, B., Thompson, R., Mineral magnetic record of the Chinese loess and paleosols (1991) Geology, 19, pp. 3-6. , New York
- Roberts, A.P., Yulong, O.Y., Verosub, K.L., Wasp-waisted hysteresis loops: Mineral magnetic characteristics and discrimination of components in mixed magnetic systems (1995) Journal of Geophysical Research, 100 (B9), pp. 17909-17924. , Washington
- Thompson, R., Oldfield, F., Environmental magnetism (1986) Alien and Unwin, p. 227. , London
- Vâsquez, C.A., Walther, A.M., Orgeira, M.J., Di Tommaso, I.M., Lippai, H., Alonso, S., Vilas, J.F.A., Paramètres de mediciön del magnetismo de rocas y su aplicaciôn a paleosuelos (1998) Revista De La Asociaciön Geolögica Argentina, 53 (1), pp. 83-90. , Buenos Aires
- Verosub, K.L., Roberts, A.P., Environmental magnetism: Past, present and future (1995) Journal of Geophysical Research, 100 (B2), pp. 2175-2192. , Washington
- Verwey, E.J.W., Haayman, P.W., Electronic conductivity and transition point in magnetite (1941) Physica, 8, p. 979. , New York. j
Citas:
---------- APA ----------
(1998) . Environmental magnetism: Loess and nalaeosols of the Buenos Aires Formation (Province of Buenos Aires) . Revista de la Asociacion Geologica Argentina, 53(1), 91-100.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v53_n1_p91_Orgeira [ ]
---------- CHICAGO ----------
Orgeira, M.J. "Environmental magnetism: Loess and nalaeosols of the Buenos Aires Formation (Province of Buenos Aires) " . Revista de la Asociacion Geologica Argentina 53, no. 1 (1998) : 91-100.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v53_n1_p91_Orgeira [ ]
---------- MLA ----------
Orgeira, M.J. "Environmental magnetism: Loess and nalaeosols of the Buenos Aires Formation (Province of Buenos Aires) " . Revista de la Asociacion Geologica Argentina, vol. 53, no. 1, 1998, pp. 91-100.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v53_n1_p91_Orgeira [ ]
---------- VANCOUVER ----------
Orgeira, M.J. Environmental magnetism: Loess and nalaeosols of the Buenos Aires Formation (Province of Buenos Aires) . Rev. Asoc. Geol. Argent. 1998;53(1):91-100.Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v53_n1_p91_Orgeira [ ]
