High-resolution 40Ar/39Ar geochronology and chemostratigraphy of volcanic rocks from the Paraná Igneous Province, Brazil: implications for extrusion rates and magmatic emplacement processes

Abstract

Estimating magma extrusion rates is crucial for determining if flood basalt magmatism may have triggered environmental changes leading to mass extinctions. The Paraná Igneous Province (PIP) is a large short-lived magmatic event with its major emplacement stage at 135±1 Ma, but it lacks a coeval extinction event. Some authors suggest that extrusion is more protracted than currently accepted since only the southern part of the PIP has been dated in detail. In this study, access to borehole samples from the northern Paraná Province will permit dating the entire province and testing whether the volcanic units in this area were extruded coevally with those in the south or if the extrusion was indeed more protracted.

Advisory Team

Principal advisor: Professor Paulo Vasconcelos
Associate advisor: Dr. Isabela Carmo
Associate advisor: Dr. Teresa Ubide

Venue

Room 518/519, Chamberlain Building (#35)