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Abstract:

Paleomagnetic secular variations (PSV) give us information on the mechanisms of the geodynamo and can also be used for stratigraphic correlation on a regional scale. In this article we present a high-resolution paleomagnetic and rock magnetic study of two cores, LCTF1 and LCTF2, collected at Carmen Lake (Tierra del Fuego, Argentina). An analysis of rock magnetic data suggests that the remanence signal is carried by Titanomagnetite grains in stable pseudo single domain (PSD) state. Notwithstanding the special mechanism of sedimentary deposition, the sequence is characterised by good paleomagnetic properties and can be used to reconstruct a continuous stratigraphic record that provides high-resolution declination, inclination and relative paleointensity curves for the period 1000–4000 cal years BP. The constructed PSV curves are in very good agreement with the available records of Southern Argentina, implying very promising results in the construction of curve patterns for the region. A comparison of the records of southern Argentina with the most recent models available demonstrates that there is a noticeable lack of agreement, which is interpreted as the critical need to add more data from the southern hemisphere in the construction of the geomagnetic field models. © 2018 Elsevier B.V.

Registro:

Documento: Artículo
Título:A continuous Late Holocene paleosecular variation record from Carmen Lake (Tierra del Fuego, Argentina)
Autor:Gogorza, C.S.G.; Irurzun, M.A.; Orgeira, M.J.; Palermo, P.; Llera, M.
Filiación:Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires (CIFICEN – CONICET – UNCPBA – CICPBA), Tandil, Argentina
Instituto de Geociencias Básicas, Aplicadas y Ambientales de Bs. As (IGEBA-CONICET), Universidad de Buenos Aires, Buenos Aires, Argentina
Palabras clave:Argentina; Lake sediments; Late Holocene; Paleomagnetism; Secular variations; Geomagnetism; Lithology; Stratigraphy; Argentina; Lake sediments; Late Holocene; Paleomagnetism; Secular variation; Lakes; geomagnetic field; Holocene; lacustrine deposit; paleomagnetism; remanent magnetization; secular variation; Argentina; Tierra del Fuego [(PRV) Argentina]
Año:2018
Volumen:280
Página de inicio:40
Página de fin:52
DOI: http://dx.doi.org/10.1016/j.pepi.2018.04.006
Título revista:Physics of the Earth and Planetary Interiors
Título revista abreviado:Phys. Earth Planet. Inter.
ISSN:00319201
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319201_v280_n_p40_Gogorza

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Citas:

---------- APA ----------
Gogorza, C.S.G., Irurzun, M.A., Orgeira, M.J., Palermo, P. & Llera, M. (2018) . A continuous Late Holocene paleosecular variation record from Carmen Lake (Tierra del Fuego, Argentina). Physics of the Earth and Planetary Interiors, 280, 40-52.
http://dx.doi.org/10.1016/j.pepi.2018.04.006
---------- CHICAGO ----------
Gogorza, C.S.G., Irurzun, M.A., Orgeira, M.J., Palermo, P., Llera, M. "A continuous Late Holocene paleosecular variation record from Carmen Lake (Tierra del Fuego, Argentina)" . Physics of the Earth and Planetary Interiors 280 (2018) : 40-52.
http://dx.doi.org/10.1016/j.pepi.2018.04.006
---------- MLA ----------
Gogorza, C.S.G., Irurzun, M.A., Orgeira, M.J., Palermo, P., Llera, M. "A continuous Late Holocene paleosecular variation record from Carmen Lake (Tierra del Fuego, Argentina)" . Physics of the Earth and Planetary Interiors, vol. 280, 2018, pp. 40-52.
http://dx.doi.org/10.1016/j.pepi.2018.04.006
---------- VANCOUVER ----------
Gogorza, C.S.G., Irurzun, M.A., Orgeira, M.J., Palermo, P., Llera, M. A continuous Late Holocene paleosecular variation record from Carmen Lake (Tierra del Fuego, Argentina). Phys. Earth Planet. Inter. 2018;280:40-52.
http://dx.doi.org/10.1016/j.pepi.2018.04.006