GMPV Geochemistry, Mineralogy, Petrology & Volcanology
The 2019 Outstanding Student Poster and PICO (OSPP) Awards is awarded to Mahyra Tedeschi for the poster/PICO entitled:
Petrochronology of UHT garnet-free granulites: Linking zircon geochemistry to metamorphic reactions (Tedeschi, M.; Peters, D.; Moraes, R.; Pedrosa-Soares, A.)
Click here to download the poster/PICO file.
Mahyra Tedeschi is a former PhD candidate of the Federal University of Minas Gerais (Brazil). As part of her PhD, she spent one year at the University of Bern (Switzerland) for a research internship. Mahyra applied field-based geological mapping and petrochronology on ultrahigh-temperature and high-pressure metamorphic rocks from the Southern Brasília orogen (SE Brazil). This work was important and permitted to deepen the understanding of the geodynamic evolution of this region. During EGU 2019, she presented a detailed petrochronological study of ultrahigh-temperature garnet-free granulites from SE Brazil. In these rocks, the only mineral chronometer, zircon, presents a protracted U-Pb age record. She discussed the role of metamorphic reactions in the geochemical signature of zircon and provided new clues to decoding such complex time records. Currently, Mahyra is an adjunct professor of Mineralogy and Petrochronology at the Federal University of Minas Gerais. Her research is focused on geochronology combined with the reconstruction of pressure-temperature-time paths and geochemistry to unfold the timing and rates of geological process – mainly igneous and metamorphic – and to understand the geodynamic evolution of Precambrian orogens.