Evento
Controls on the dedolomitization of top of Villa Mónica Formation, Tandilia System
Ferreyra, Camila
; Gómez Peral, Lucia
; Raigemborn, María Sol
; Arrouy, Maria Julia
; Penzo, Victoria
; Sial, Alcides N.
Colaboradores:
Lizzoli, Sabrina
; Isla, Manuel Fermín
; López, Manuel
; Moyano Paz, Damián
; Raigemborn, María Sol
Tipo del evento:
Reunión
Nombre del evento:
XVIII Reunión Argentina de Sedimentología y IX Congreso Latinoamericano de Sedimentología
Fecha del evento:
19/09/2023
Institución Organizadora:
Asociación Argentina de Sedimentología;
Título del Libro:
Actas de la XVIII Reunión Argentina de Sedimentología y IX Congreso Latinoamericano de Sedimentología
Editorial:
Asociación Argentina de Sedimentología
ISBN:
978-631-90299-0-1
Idioma:
Inglés
Clasificación temática:
Resumen
Dedolomitization is the process of replacement of dolomite by calcite which mostly occurs under meteoric water influence. The shallow marine deposits of the Villa Mónica Formation (VMF) (~1150-720 Ma) constitute here is a good example of where to study this process. VMF is the older unit of the sedimentary basin infill in Tandilia System (Buenos Aires, Argentina), and it is formed by a lower section (22 m) mainly composed of quartz-arkosic sandstones, and an upper mainly dolomitic section (36-52 m) with thin interbedded green claystone levels and ending with red claystone and purple marl. The contact between the top of VMF and the base of the Colombo Formation is an erosive surface. Previous studies indicate that the VMF was affected by deep burial diagenesis followed by telogenesis. However, the expression of the weathering processes over the dolostones is poorly known. Thus, the proposal of this work is to recognize and characterize features related to weathering processes in the last meters of the upper section of the VMF.
Palabras clave:
NEOPROTEROZOIC
,
Weathering
,
Paleosurface
,
Paleoclimate
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Identificadores
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Eventos(CIG)
Eventos de CENTRO DE INVEST.GEOLOGICAS (I)
Eventos de CENTRO DE INVEST.GEOLOGICAS (I)
Citación
Controls on the dedolomitization of top of Villa Mónica Formation, Tandilia System; XVIII Reunión Argentina de Sedimentología y IX Congreso Latinoamericano de Sedimentología; La Plata; Argentina; 2023; 272-272
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