Banca de DEFESA: ERICK MATHEUS VAZ GUEDES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : ERICK MATHEUS VAZ GUEDES
DATA : 29/08/2019
HORA: 09:00
LOCAL: IGEO
TÍTULO:

P-T PSEUDOSECTIONS BASED ON THE CHEMICAL VARIATION OF ZONED GARNETS IN THE METAPELITIC ROCKS OF EAST MACURURÉ DOMAIN, SERGIPAN OROGEN

PALAVRAS-CHAVES:

Macururé Domain; P-T pseudosection; Garnet; Metamorphic zones

PÁGINAS: 57
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Geociências
SUBÁREA: Geologia
ESPECIALIDADE: Petrologia
RESUMO:

Macururé Domain corresponds to the most expressive domain of Sergipan Orogen, emerging in the states of Bahia, Sergipe and Alagoas and is composed predominantly by metapsamopelites. This work aimed to identify the pressure and temperature conditions that these rocks were submitted to, with P-T pseudosection building by Perple_X software. Recent works have shown that the metapelitic rocks of the Macururé Domain exhibit a metamorphic progression from south to north from the schist-green to amphibolite facies, marked by the metamorphic zoneography initiated by the garnet zone, passing through the kyanite zone and ending up in the silimanite zone, showing an intermediate pressures metamorphism (Barrowian). The results obtained by bulk-rock composition + the variation of XCa and XMg core-edge garnet crystals (XRF and EMP-WDS), for a sample from each zone indicated conditions that confirmed this progression of metamorphism to northern, however, an event which stabilized the three samples under amphibolite facies conditions was recorded. For the sample placed on garnet zone, the conditions indicated by the garnet core and edge were 449ºC - 0.438GPa and 629ºC - 1.094GPa, respectively. While for the sample placed on kyanite zone the values obtained were 515ºC - 0.655GPa (core) and 616ºC - 0.845GPa (edge) and for the sample situated on silimanite zone the presented were 512ºC - 0.615 GPa (core) and 617ºC - 1,129GPa (edge).

MEMBROS DA BANCA:
Presidente - 2982944 - JAILMA SANTOS DE SOUZA DE OLIVEIRA
Interno - 1295799 - ANGELA BEATRIZ DE MENEZES LEAL
Externo à Instituição - IVANA CONCEICAO DE ARAUJO PINHO