| Revista: | Anais da Academia Brasileira de Ciencias |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000420574 |
| ISSN: | 0001-3765 |
| Autors: | Zucolotto, Maria Elizabeth1 Tosi, Amanda A2 Villaca, Caio V.N2 Moutinho, Andre L.R3 Andrade, Diana P.P4 Faulstich, Fabiano1 Gomes, Angelo M.S5 Rios, Debora C6 Rocha, Marcilio C7 |
| Institucions: | 1Universidade Federal do Rio de Janeiro, Museu Nacional, Rio de Janeiro. Brasil 2Universidade Federal do Rio de Janeiro, Instituto de Geociencias, Rio de Janeiro. Brasil 3International Meteorite Colector Association, Jacarei, Sao Paulo. Brasil 4Universidade Federal do Rio de Janeiro, Observatório do Valongo, Rio de Janeiro. Brasil 5Universidade Federal do Rio de Janeiro, Instituto de Fisica, Rio de Janeiro. Brasil 6Universidade Federal da Bahia, Instituto de Geociencias, Salvador, Bahia. Brasil 7Universidade Federal do Para, Departamento de Geociencias e Engenharias, Belem, Para. Brasil |
| Any: | 2018 |
| Període: | Mar |
| Volum: | 90 |
| Número: | 1 |
| Paginació: | 3-16 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico, descriptivo |
| Resumen en inglés | Serra Pelada is the newest Brazilian eucrite and the first recovered fall from Amazonia (State of Pará, Brazil, June 29th 2017). In this paper, we report on its petrography, chemistry, mineralogy and its magnetic properties. Study of four thin sections reveals that the meteorite is brecciated, containing basaltic and gabbroic clasts, as well of recrystallized impact melt, embedded into a fine-medium grained matrix. Chemical analyses suggest that Serra Pelada is a monomict basaltic eucritic breccia, and that the meteorite is a normal member of the HED suite. Our results provide additional geological and compositional information on the lithological diversity of its parent body. The mineralogy of Serra Pelada consists basically of low-Ca pyroxene and high-Ca plagioclase with accessory minerals such as quartz, sulphide (troilite), chromite - ulvöspinel and ilmenite. These data are consistent with the meteorite being an eucrite, a basaltic achondrite and a member of the howardite-eucrite-diogenite (HED) clan of meteorites which most likely are from the crust asteroid 4 Vesta |
| Disciplines | Física y astronomía, Geociencias |
| Paraules clau: | Astronomía, Mineralogía, petrología y geoquímica, Meteoritos, Eucrita, Clastos basálticos |
| Keyword: | Astronomy, Mineralogy, petrology and geochemistry, Meteorites, Eucrite, Basaltic clasts |
| Text complet: | Texto completo (Ver HTML) |
