Detail publikace

Phlogopite/matrix, clinopyroxene/matrix and clinopyroxene/phlogopite trace-element partitioning in a calc-alkaline lamprophyre: new constrains from the Křižanovice minette dyke (Bohemian Massif)

KRMÍČEK, L. HALAVÍNOVÁ, M., ROMER, R. L., VAŠINOVÁ GALIOVÁ, M., VACULOVIČ, T.

Originální název

Phlogopite/matrix, clinopyroxene/matrix and clinopyroxene/phlogopite trace-element partitioning in a calc-alkaline lamprophyre: new constrains from the Křižanovice minette dyke (Bohemian Massif)

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Mineral/matrix and mineral/mineral partition coefficients were determined for clinopyroxene and phlogopite phenocrysts and their very fine-grained (chilled) groundmass from a Variscan calc-alkaline (agpaitic index = 0.6) lamprophyre dyke of minette composition from the Bohemian Massif (Křižanovice, Teplá-Barrandian Unit). This dyke is characterized by high MgO (8.9 wt. %; Mg-number = 69) at intermediate SiO2 content (53 wt. %). The partition coefficients (D) between clinopyroxene and matrix were determined for 23 elements by laser ablation-inductively coupled plasma-mass spectrometry. Calculated phlogopite/matrixD values are very low, except for heavy rare earth elements (HREE) that range between 0.9 and 1.1. This suggests that HREE can be concentrated in clinopyroxene during crystallization from lamprophyre melt. In phlogopite, only 15 elements had contents above their respective detection limits. Phlogopite/matrix partition coefficients are on average higher than 1 (DBa = 1.1, DRb = 1.7 DTi = 1.5) and extremely low (≥ 0.02) for light rare earth elements (LREE). On the other hand, phlogopite/matrix D values for the majority of HREE could not be determined. Taken together, during simultaneous crystallization of clinopyroxene and phlogopite phenocrysts, Th, Zr, Hf, Y and LREE are preferentially partitioned into clinopyroxene and Ba with Rb and Ti into phlogopite.

Klíčová slova

Bohemian Massif;mineralogy;calc-alkaline lamprophyres;partition coefficients

Autoři

KRMÍČEK, L.; HALAVÍNOVÁ, M., ROMER, R. L., VAŠINOVÁ GALIOVÁ, M., VACULOVIČ, T.

Rok RIV

2014

Vydáno

1. 2. 2014

Nakladatel

Czech Geological Society

Místo

Czech Republic

ISSN

1802-6222

Periodikum

Journal of GEOsciences

Ročník

59

Číslo

1

Stát

Česká republika

Strany od

87

Strany do

96

Strany počet

10

URL

http://www.jgeosci.org/detail/jgeosci.160

BibTex

@article{BUT112948,
  author="Lukáš {Krmíček} and Michaela {Sluková}",
  title="Phlogopite/matrix, clinopyroxene/matrix and clinopyroxene/phlogopite trace-element partitioning in a calc-alkaline lamprophyre: new constrains from the Křižanovice minette dyke (Bohemian Massif)",
  journal="Journal of GEOsciences",
  year="2014",
  volume="59",
  number="1",
  pages="87--96",
  doi="10.3190/jgeosci.160",
  issn="1802-6222",
  url="http://www.jgeosci.org/detail/jgeosci.160"
}