RECONNAISSANCE STUDY OF TRACE-ELEMENT ZONATION IN GARNET FROM THE CENTRAL STRUCTURAL DOMAIN, NORTHEASTERN BRAZIL-AN EXAMPLE OF POLYMETAMORPHIC GROWTH (Articolo in rivista)

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Label
  • RECONNAISSANCE STUDY OF TRACE-ELEMENT ZONATION IN GARNET FROM THE CENTRAL STRUCTURAL DOMAIN, NORTHEASTERN BRAZIL-AN EXAMPLE OF POLYMETAMORPHIC GROWTH (Articolo in rivista) (literal)
Anno
  • 1995-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/0895-9811(95)00016-9 (literal)
Alternative label
  • DELIMA E.S. a; VANNUCCI R. b,c; BOTTAZZI P. c; OTTOLINI L. c (1995)
    RECONNAISSANCE STUDY OF TRACE-ELEMENT ZONATION IN GARNET FROM THE CENTRAL STRUCTURAL DOMAIN, NORTHEASTERN BRAZIL-AN EXAMPLE OF POLYMETAMORPHIC GROWTH
    in Journal of South American earth sciences
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • DELIMA E.S. a; VANNUCCI R. b,c; BOTTAZZI P. c; OTTOLINI L. c (literal)
Pagina inizio
  • 315 (literal)
Pagina fine
  • 324 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 8 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 3-4 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • a. Departamento de Geologia, Universidade Federal de Pernambuco, Recife, PE, Brazil; b. Dipartimento di Scienze della Terra, Via Bassi 4, 27100, Pavia, Italy; c. CNR-Centro di Studio per la Cristallochimica e la Cristallografia, Via Bassi 4, 27100, Pavia, Italy; (literal)
Titolo
  • RECONNAISSANCE STUDY OF TRACE-ELEMENT ZONATION IN GARNET FROM THE CENTRAL STRUCTURAL DOMAIN, NORTHEASTERN BRAZIL-AN EXAMPLE OF POLYMETAMORPHIC GROWTH (literal)
Abstract
  • Trace-element and major-element zoning in garnet from regionally metamorphosed rocks of the Serido Formation, Central Structural Domain, Northeastern Brazil, was measured with an ion- and electron-microprobe. The distribution of major and trace elements is different in the three garnets analyzed. Two of them (garnet SS-21 and SV-2) show a zoning profile with respect to some major elements, whereas the third garnet (SS-40) presents a fairly flat profile. Trace-element zoning is also different in these garnets and can be divided into: I) elements which show an approximately Bat profile; II) elements which show an approximately flat profile, but present a sharp step-like increase at boundary core/rim; III) elements which show a continuous increase or decrease from core to rim; and III) elements which show an irregular behavior. The discontinuities in Ti, V and Eu/Eu* profiles are interpreted as indications of overgrowth of garnet during a second episode of metamorphism. The inflections (Y and Cr) and hump (Sc) probably represent a partial re-equilibration of these elements during the second metamorphic event. The flat profiles in major elements indicate re-equilibration (diffusion) during the second metamorphism, at P/T conditions of high amphibolite facies. (literal)
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