Campo DC | Valor | Idioma |
dc.contributor.advisor | blue sodalite | - |
dc.contributor.author | Rosa, Maria De Lourdes Da Silva | - |
dc.contributor.author | Conceição, Herbet | - |
dc.contributor.author | Macambira, Moacir José Buenano | - |
dc.contributor.author | Marinho, Moacyr Moura | - |
dc.contributor.author | Cunha, Mônica Prisgsheim Da | - |
dc.contributor.author | Menezes, Rita Cunha Leal | - |
dc.creator | Rosa, Maria De Lourdes Da Silva | - |
dc.creator | Conceição, Herbet | - |
dc.creator | Macambira, Moacir José Buenano | - |
dc.creator | Marinho, Moacyr Moura | - |
dc.creator | Cunha, Mônica Prisgsheim Da | - |
dc.creator | Menezes, Rita Cunha Leal | - |
dc.date.accessioned | 2011-09-02T14:58:14Z | - |
dc.date.available | 2011-09-02T14:58:14Z | - |
dc.date.issued | 2004 | - |
dc.identifier.issn | 2177-4382 | - |
dc.identifier.uri | http://www.repositorio.ufba.br/ri/handle/ri/2516 | - |
dc.description | p. 347-354 | pt_BR |
dc.description.abstract | Pb-Pb AGE AND PETROOLOGICAL ASPECTS OF THE BLUE SODALITE MINERALIZATION OF THE ITARANTIM
NEPHELINE-SYENITE MASSIF, SOUTHERN STATE OF BAHIA The Itarantim nepheline-syenite massif (220 km2) is a late proterozoic intrusion (727±30 Ma; Rb-Sr) of the southern region of the State of Bahia. It is mostly constituted by nepheline-bearing syenites, with biotite or aegirine, and by alkaline dykes. The dykes are more abundant in the biotite-nepheline-syenites and are the most evolved rocks of the massif. Recently, a blue sodalite-syenite dyke has been identified in the southwest part of the massif, hosted by biotite-nepheline syenites. The blue syenites have been exploited as dimension stone. The dyke has magmatic sodalite that
crystallized between 720 ± 9 Ma and 732 ± 24 Ma (Pb-PbZr), and cuts the magmatic foliation of the host syenite, imprinting a
metasomatism with sodalite formation. Petrographic data indicate that the magmatic sodalite formed during the late stages by a
volatile rich magma (500–600o C). The high contents (ppm) of Zr (>5,000), Hf (141), Ta (169), U (74) and F (1200) of the blue
syenite suggest that it represents a highly evolved product from differentiation of the nepheline-syenitic magma. | pt_BR |
dc.language.iso | pt_BR | pt_BR |
dc.subject | Pb-Pb age | - |
dc.subject | Idade Pb-Pb | pt_BR |
dc.subject | Itarantim Nepheline-Syenitic Massif | - |
dc.subject | Maciço Nefelina-Sienítico Itarantim | pt_BR |
dc.subject | sodalita azul | pt_BR |
dc.title | Idade Pb-Pb E Aspectos Petrológicos Da Mineralização Em Sodalita Azul Do Maciço Nefelina-Sienítico Itarantim, Sul Do Estado Da Bahia | pt_BR |
dc.title.alternative | Revista Brasileira de Geociências | pt_BR |
dc.type | Artigo de Periódico | pt_BR |
dc.identifier.number | 34(3) | pt_BR |
Aparece nas coleções: | Artigo Publicado em Periódico (IGEO)
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