Resultados preliminares del estudio realizado en una secuencia de coladas volcánicas Plio-Cuaternarias en Georgiautilizando magnetismo de rocas, paleomagnetismo y paleointensidad
- A. Caccavari 1
- M. Calvo Rathert 2
- A. Gogichaishvili 1
- G. Vashakidze 3
- N. Vegas 4
- B. Aguilar 1
-
1
Universidad Nacional Autónoma de México
info
-
2
Universidad de Burgos
info
-
3
Tbilisi State University
info
-
4
Universidad del País Vasco/Euskal Herriko Unibertsitatea
info
Universidad del País Vasco/Euskal Herriko Unibertsitatea
Lejona, España
ISSN: 1576-5172
Datum der Publikation: 2012
Titel der Ausgabe: VIII Congreso Geológico de España, Oviedo, 17-19 de julio, 2012.
Nummer: 13
Seiten: 1208-1211
Art: Artikel
Andere Publikationen in: Geotemas (Madrid)
Zusammenfassung
We present rock-magnetic, paleomagnetic and paleointensity results obtained on samples belonging to a pliocen sequence of 39 successive lava flows from Saro, Georgia. With an age of 2.2 Ma (Lebedev et al., 2008) Analysis of thermomagnetic curves allows to distinguish four types of samples: a) Type H samples with magnetite as the only carrier of remanence, reversible behavior; b) type H*, like H but with a less reversible behavior ; c) type L curves with a low Curie-temperature phase (TC =280ºC) and non reversible behavior. d) type F. Non reversible behavior and two ferromagnetic phase. Analysis of hysteresis parameters suggests that the grain size of most studied samples corresponds to pseudo single-domain particles. Paleomagnetic experiments reveal only a single paleomagnetic component with reverse polarity, D= 205.6°, I= -60.7°, (α 95= 2.0, k= 129.6) and the calculated paleomagnetic pole yields a longitude λ= 123.1 and a latitude 71.1° (α 95=2.8°, k=72.1). The angular distance between the Virtual Geomagnetic Pole (VGP) obtained in this work and the Apparent Polar Wander Path (APWP) by Besse and Courtillot (2002) for Europe for 0 Ma is 17º and 16.7º for a 5 Ma window. We also do some paleointensity experiments, the results are now under analysis.