INVESTIGADORES
PASQUINI Andrea Ines
congresos y reuniones científicas
Título:
Geochemistry of a Late Quaternary loess-paleosol sequence in central Argentina
Autor/es:
ROUZAUT, S.; CAMPODONICO V.A.; PASQUINI, A.I.
Lugar:
La Plata
Reunión:
Congreso; V Reunión Argentina de Geoquímica de la Superficie; 2019
Institución organizadora:
CIG y CEQUINOR (CONICET - UNLP)
Resumen:
A loess-paleosol sequence in central Argentina was geochemically analyzed. Corralito I sequence (32°00?7? S, 64°11?08? W, 469 m a.s.l) is composed by three paleosols and a buried soil separated by loess layers. Weathering indices (CIA, CIW, LWI), elemental ratios (∑Bases/Al2O3, Rb/Sr, CaO/TiO2, Na2O/TiO2), and mean annual paleo-precipitation indices (MAPPs) were calculated in order to obtain a weathering insight and to probe geochemical paleoclimatic proxies. The results indicate an incipient weathering degree throughout the sequence, without significant geochemical differences between paleosols and the loess mantles. Moreover, geochemical paleoclimatic proxies (MAPPs) do not detect a significant paleoprecipitation variability for the time period recorded in the studied loess-paleosol sequence.
