IGEBA 23946
INSTITUTO DE GEOCIENCIAS BASICAS, APLICADAS Y AMBIENTALES DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Detailed early Holocene (10.3 cal kybp) paleomagnetic record with anomalous directions from Mendoza Province
Autor/es:
DURÁN, V. ; NAMI, HUGO. G.; VÁSQUEZ, CARLOS A.
Revista:
LatinMag Letters
Editorial:
Universidad Nacional Autónoma de México
Referencias:
Año: 2017 vol. 7 p. 1 - 17
ISSN:
2007-9656
Resumen:
A detailed palaeomagnetic study was performed in Barrancas de Maipú archaeological locality, Mendoza province, western Argentina. The paleomagnetic research took into account rock magnetism and directional analysis. The former reveals that the main magnetic carrier was magnetite or Ti-poortitanomagnetite. Characteristic remanence magnetization directions were determined by progressive alternating field demagnetization. Data from 47 cores showed anomalous directions far from the present magnetic field during the early Holocene in a well dated section of ~10.3 calibrated radiocarbon kiloyearsbefore present. The virtual geomagnetic poles were calculated from the directional results. When plotted in a present world map are concentrated over Australia and Southeast Asia. The anomalous directions at Barrancas de Maipú probably represents a possible geomagnetic field excursion occurred during thePleistocene-Holocene transition and initial Holocene recorded in several sites and localities across the world.
