IANIGLA   20881
INSTITUTO ARGENTINO DE NIVOLOGIA, GLACIOLOGIA Y CIENCIAS AMBIENTALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Multiproxy approach to calculate paleotemperatures from deep time lacustrine carbonates
Autor/es:
BENAVENTE, CECILIA ANDREA; MANCUSO, ADRIANA CECILIA; BOWEN, GABRIEL; IRMIS, RANDALL
Reunión:
Otro; The Carbonate Forum; 2021
Resumen:
Combine δ18O and δ13C data from lacustrine carbonates of Argentina (SW Gondwana) to obtain paleotemperature calculations and constrain them with global terrestrial and marine paleotemperature records for the Triassic (Anisian/Ladinian/Carnian) to assemble a global paleotemperature data base. Hyphoteses: 1) The relationship bewteen δ18Op-temperature was significantly different during the Triassic in comparison with the modern 2) Spatial δ18Op heterogeneity was controlled by paleotopography. Paleotemperatures (Pt) were calculated for 2 end members of paleolatitude and paleoelevation yielding 4 different estimates for each δ18Oc value. Pt were analyzed with global records using the joint proxy inversion method (Bowen et al. 2020). Data suggest: warmer conditions without a substantially different pole to equator gradient, δ18O-temp relationship probably different than modern, indication of spatial heterogeneity in precipitation δ18O possibly due to paleotopography. Paleoclimate data from terrestrial ecosystems of the Triassic is scarce. This is a novel multiproxy approach to model paleotemperature calculations from lacustrine carbonates for deep time systems.