Publication detail

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.

Original 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)

Type

journal article in Web of Science

Language

English

Original Abstract

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.

Keywords

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

Authors

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

RIV year

2014

Released

1. 2. 2014

Publisher

Czech Geological Society

Location

Czech Republic

ISBN

1802-6222

Periodical

Journal of GEOsciences

Year of study

59

Number

1

State

Czech Republic

Pages from

87

Pages to

96

Pages count

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"
}