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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). In phlogopite, only 15 elements had contents above their respective detection limits. This suggests that HREE can be concentrated in clinopyroxene during crystallization from lamprophyre melt. Calculated clinopyroxene/matrixD values are very low, except for heavy rare earth elements (HREE) that range between 0.9 and 1.1. The partition coefficients (D) between clinopyroxene and matrix were determined for 23 elements by laser ablation-inductively coupled plasma-mass spectrometry. % Mg-number = 69) at intermediate SiO2 content (53 wt. This dyke is characterized by high MgO (8.9 wt. 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). alkali feldspar) should be among the fractionated phases in order to produce the potassic syenites. This hypothesis is not consistent with Ba concentrations in clinopyroxene and mica, which suggest that a Ba-bearing phase (e.g. Ce/Yb, Rb/Sr, and Zr/Hf ratios in clinopyroxene and mica suggest that the minettic magma could produce the host Piquiri potassic syenite by fractional crystallization. This partition value may indicate the lack of other mineral phase with high partition for this element during crystallization, and may be enhanced by the liquid composition progressively closer to alkali feldspar, an unsuitable structure for six-coordinated cations. Y and HREE are concentrated in clinopyroxene, whilst the other trace elements have Kd3) determined in the studied phlogopite is unusual in lamproites, lamprophyres, and basalts, but frequently observed in phlogopite from metasomatic mantle samples, as well as in acid magmas. The presence of pyrope together with K-clinopyroxene excludes such hypotheses for the studied enclaves. Spidergrams for clinopyroxenes exhibit negative-Sr anomalies relative to LREE, which have been associated by most authors to crystallization under low-pressures, out of garnet stability field. Furthermore, these partition data are completely different from those determined for potassic lavas crystallized under crustal pressures. Clinopyroxene/melt partition coefficient for most trace elements are close to determinations in alkali-basalts and lamproites from Leucite Hills, with considerable differences relative to Gaussberg lamproites. In a general view, the concentrations of most trace and rare earth elements in clinopyroxene of the studied enclaves are higher than those referred to by other authors. Major and trace element composition of these lamprophyric enclaves is quite similar to those observed in silica-rich lamproites, suggesting that similar sources were involved in their origin. This co-mingled system was crystallized at high pressures, which varied about 3–5GPa, as indicated by the presence of K-clinopyroxenes and pyrope-rich garnet with measurable amounts of K2O and Na2O, among the near-liquidus phases. Trace and rare earth element contents were determined by SIMS technique in clinopyroxene and mica crystals from minette lamprophyric enclaves in a potassic syenite host.
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