A micro-analytical approach to partition coefficients in plagioclase and clinopyroxene of basaltic sills in Serra Geral Formation, Paraná Basin, Brazil
Abstract: In the present study, detailed micro-analytical data (major and trace elements) in minerals from sills of Serra Geral Formation represents the first attempt to evaluate the partition coefficient of Sc, Ti, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Y, Zr, Nb, Mo, Cs, Ba, REE, Hf, Ta, Pb, Th and U amon...
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doaj-6f4c1eaeaef445a7a0426ca46a93c73e2020-11-24T21:58:40ZengSociedade Brasileira de GeologiaBrazilian Journal of Geology2317-469241226328910.25249/0375-7536.2011412263289S2317-48892011000200263A micro-analytical approach to partition coefficients in plagioclase and clinopyroxene of basaltic sills in Serra Geral Formation, Paraná Basin, BrazilLeonardo Cardoso RennerLéo Afraneo HartmannWilson WildnerHans-Joachim MassonneThomas TheyeAbstract: In the present study, detailed micro-analytical data (major and trace elements) in minerals from sills of Serra Geral Formation represents the first attempt to evaluate the partition coefficient of Sc, Ti, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Y, Zr, Nb, Mo, Cs, Ba, REE, Hf, Ta, Pb, Th and U among coexisting plagioclase, augite and pigeonite from 12 tholeiitic basaltic sills along the eastern border of the Paraná Basin, Brazil. These 12 samples come from Rio Grande do Sul, Paraná, São Paulo and Goiás states. Plagioclase/melt partition coefficients KD were determined in core, intermediate and rim zones using LA-ICP-MS and the results were compared with the variations of the elements Ca, Al, Na and Si in those areas. Partition coefficients of Sr and Eu decrease with the increase of Ca concentration in plagioclase. A reduction in temperature and consequently a rise in Na and Si levels increase the partition coefficients of Sr and Eu at the rim of mineral The KD of Ni and V in clinopyroxene has positive correlations with Mg2+, Ca2+ and Al3+ due to higher concentrations of those elements at the core and lower concentration towards the rim and negative correlations of KD of Sc, Cr, Co, Pb and Lu, due to preferential substitutions by Fe2+ in sixfold coordination. The use of LA-ICP-MS and EPMA made possible the chemical quantification of major and trace elements and the determination of partition coefficients in coexisting plagioclase and clinopyroxene in basaltic melts.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892011000200263&lng=en&tlng=enPartition coefficientplagioclaseclinopyroxeneSerra Geral FormationLA-ICP-MS |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Leonardo Cardoso Renner Léo Afraneo Hartmann Wilson Wildner Hans-Joachim Massonne Thomas Theye |
spellingShingle |
Leonardo Cardoso Renner Léo Afraneo Hartmann Wilson Wildner Hans-Joachim Massonne Thomas Theye A micro-analytical approach to partition coefficients in plagioclase and clinopyroxene of basaltic sills in Serra Geral Formation, Paraná Basin, Brazil Brazilian Journal of Geology Partition coefficient plagioclase clinopyroxene Serra Geral Formation LA-ICP-MS |
author_facet |
Leonardo Cardoso Renner Léo Afraneo Hartmann Wilson Wildner Hans-Joachim Massonne Thomas Theye |
author_sort |
Leonardo Cardoso Renner |
title |
A micro-analytical approach to partition coefficients in plagioclase and clinopyroxene of basaltic sills in Serra Geral Formation, Paraná Basin, Brazil |
title_short |
A micro-analytical approach to partition coefficients in plagioclase and clinopyroxene of basaltic sills in Serra Geral Formation, Paraná Basin, Brazil |
title_full |
A micro-analytical approach to partition coefficients in plagioclase and clinopyroxene of basaltic sills in Serra Geral Formation, Paraná Basin, Brazil |
title_fullStr |
A micro-analytical approach to partition coefficients in plagioclase and clinopyroxene of basaltic sills in Serra Geral Formation, Paraná Basin, Brazil |
title_full_unstemmed |
A micro-analytical approach to partition coefficients in plagioclase and clinopyroxene of basaltic sills in Serra Geral Formation, Paraná Basin, Brazil |
title_sort |
micro-analytical approach to partition coefficients in plagioclase and clinopyroxene of basaltic sills in serra geral formation, paraná basin, brazil |
publisher |
Sociedade Brasileira de Geologia |
series |
Brazilian Journal of Geology |
issn |
2317-4692 |
description |
Abstract: In the present study, detailed micro-analytical data (major and trace elements) in minerals from sills of Serra Geral Formation represents the first attempt to evaluate the partition coefficient of Sc, Ti, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Y, Zr, Nb, Mo, Cs, Ba, REE, Hf, Ta, Pb, Th and U among coexisting plagioclase, augite and pigeonite from 12 tholeiitic basaltic sills along the eastern border of the Paraná Basin, Brazil. These 12 samples come from Rio Grande do Sul, Paraná, São Paulo and Goiás states. Plagioclase/melt partition coefficients KD were determined in core, intermediate and rim zones using LA-ICP-MS and the results were compared with the variations of the elements Ca, Al, Na and Si in those areas. Partition coefficients of Sr and Eu decrease with the increase of Ca concentration in plagioclase. A reduction in temperature and consequently a rise in Na and Si levels increase the partition coefficients of Sr and Eu at the rim of mineral The KD of Ni and V in clinopyroxene has positive correlations with Mg2+, Ca2+ and Al3+ due to higher concentrations of those elements at the core and lower concentration towards the rim and negative correlations of KD of Sc, Cr, Co, Pb and Lu, due to preferential substitutions by Fe2+ in sixfold coordination. The use of LA-ICP-MS and EPMA made possible the chemical quantification of major and trace elements and the determination of partition coefficients in coexisting plagioclase and clinopyroxene in basaltic melts. |
topic |
Partition coefficient plagioclase clinopyroxene Serra Geral Formation LA-ICP-MS |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892011000200263&lng=en&tlng=en |
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