Trace elements in minerals as indicators of the evolution of alkaline ultrabasic dike series: LA-ICP-MS data for the magmatic provinces of northeastern Fennoscandia and Germany

Arzamastsev, A. A.; Arzamastseva, L. V.; Беа, Ф.; Montero, P.

doi:10.1134/s0869591109010032

Cited by 32 publications

(26 citation statements)

References 54 publications

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“…Contrary to the published experimental results, our data indicate that in common with undersaturated silicate melts (Prowatke and Klemme, 2006;Arzamastsev et al, 2009), REE are compatible with respect to apatite in carbonatitic systems (those in the middle of the lanthanide series more so than either La or Yb), and their compatibility increases with the normative content of dolomite in the melt. Given the high limits of P 2 O 5 solubility in such melts (at least 6.5 wt.%), fractionation of apatite will have a profound effect on the trace-element budget of evolving phosphate-rich carbonatitic magma (e.g., cause its depletion in rare earths).…”

Section: Conclusion and Recommendations For Future Workcontrasting

confidence: 99%

“…7 in Hammouda et al, 2010) is misleading. The REE partition coefficients presented in this and some previous publications (e.g., Klemme and Dalpé, 2003;Brassinnes et al, 2005;Arzamastsev et al, 2009) clearly do not conform to a simple unimodal pattern (Fig. 12a).…”

Section: Rare-earth Partitioning Between Apatite and Carbonatitic Magmacontrasting

confidence: 63%

“…The abundance of Mg and Fe in mantle-derived magmas will most certainly affect the partitioning behavior of REE, Sr, Na and other elements that readily substitute for Ca, but not for the smaller divalent cations ( values observed between Pr and Ho. Interestingly, similar geometry is seen in the patterns of REE distribution between fluorapatite and melilitite from Kaiserstuhl (Arzamastsev et al, 2009) and synthetic nepheline-normative basaltic melt (Prowatke and Klemme, 2006). That there is no well-defined peak in any of these models, and the curves are nearly flat across a wide range of ionic radii (Figs.…”

Section: Rare-earth Partitioning Between Apatite and Carbonatitic Magmasupporting

confidence: 58%

“…Klemme and Dalpé (2003) ("KD") and Hammouda et al (2010) ("HP"). Data for nepheline-normative basalts (Prowatke and Klemme, 2006) and melilitites (Arzamastsev et al, 2009) are plotted for reference ("PK" and "A", respectively). (b) Ap/crb D REE data for the Zibo calcite carbonatite fitted to two partitioning curves corresponding to the Ca1 and Ca2 sites, respectively; an inferred single partitioning curve for fluorand hydroxylapatite in a calcitic melt (Klemme and Dalpé, 2003) is shown for comparison.…”

Section: Conclusion and Recommendations For Future Workmentioning

confidence: 99%

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Apatite in carbonatitic rocks: Compositional variation, zoning, element partitioning and petrogenetic significance

Chakhmouradian

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Zaitsev

et al. 2017

Lithos

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Apatite-group phosphates are nearly ubiquitous in carbonatites, but our understanding of these minerals is inadequate, particularly in the areas of element partitioning and petrogenetic interpretation of their compositional variation among spatially associated rocks and within individual crystals. In the present work, the mode of occurrence, and major-and trace-element chemistry of apatite (sensu lato) from calcite and dolomite carbonatites, their associated cumulate rocks (including phoscorites) and hydrothermal parageneses were studied using a set of 80 samples from 50 localities worldwide. The majority of this set represents material for which no analytical data are available in the literature. Electron-microprobe and laser-ablation mass-spectrometry data (~600 and 400 analyses, respectively), accompanied by back-scattered-electron and cathodoluminescence images and Raman spectra, were used to identify the key compositional characteristics and zoning patterns of carbonatitic apatite. These data are placed in the context of phosphorus geochemistry in carbonatitic systems and carbonatite evolution, and compared to the models proposed by previous workers. The documented variations in apatite morphology and zoning represent a detailed record of a wide range of evolutionary processes, both magmatic and fluid-driven. The majority of igneous apatite from the examined rocks is Cl-poor fluorapatite or F-rich hydroxylapatite ( 0.3 apfu F) with 0.2-2.7 wt.% SrO, 0-4.5 wt.% LREE 2 O 3 , 0-0.8 wt.% Na 2 O, and low levels of other cations accommodated in the Ca site (up to 1000 ppm Mn, 2300 ppm Fe, 200 ppm Ba, 150 ppm Pb, 700 ppm Th and 150 ppm U), none of which show meaningful correlation with the host-rock type. Silicate, (SO 4) 2and (VO 4) 3anions, substituting for (PO 4) 3-, tend to occur in greater abundance in crystals from calcite carbonatites (up to 4.2 wt.% SiO 2 , 1.5 wt.% SO 3 and 660 ppm V). Although (CO 3) 2groups are very likely present in some samples, Raman micro-spectroscopy proved inconclusive for apatites with small P-site deficiencies and other substituent elements in this site. Indicator REE ratios sensitive to redox conditions (Ce, Eu) and hydrothermal overprint (Y) form a fairly tight cluster of values (0.8-1.3, 0.8-1.1 and 0.6-0.9, respectively) and may be used in combination with trace-element abundances for the development of geochemical exploration tools. Hydrothermal apatite forms in carbonatites as the product of replacement of primary apatite, or is deposited in fractures and interstices as euhedral crystals and aggregates associated with typical late-stage minerals (e.g., quartz and chlorite). Hydrothermal apatite is typically depleted in Sr, REE, Mn and Th, but enriched in F (up to 4.8 wt.%) relative to its igneous precursor, and also differs from the latter in at least some of key REE ratios [e.g., shows (La/Yb) cn  25, or a negative Ce anomaly]. The only significant exception is Sr(REE,Na)-rich replacement zones and overgrowths on igneous apatite from some dolomite(-bearing) carbonati...

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Section: Conclusion and Recommendations For Future Workcontrasting

confidence: 99%

Section: Rare-earth Partitioning Between Apatite and Carbonatitic Magmacontrasting

confidence: 63%

Section: Rare-earth Partitioning Between Apatite and Carbonatitic Magmasupporting

confidence: 58%

Section: Conclusion and Recommendations For Future Workmentioning

confidence: 99%

See 2 more Smart Citations

Apatite in carbonatitic rocks: Compositional variation, zoning, element partitioning and petrogenetic significance

Chakhmouradian

Reguir

Zaitsev

et al. 2017

Lithos

178

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“…O estudo de partição de elementos traços em olivina, por exemplo, é sensível a esta problemática. Em Arzamastsev et al (2009), foram obtidos coeficientes para setes elementos traços entre olivina e melanefelinito, uma vez que os demais traços estavam abaixo do limite de detecção da técnica analítica aplicada.…”

Section: Introductionunclassified

Coeficientes de partição de elementos traços entre minerais máficos (clinopiroxênio e olivina) e líquidos ultrabásicos alcalinos (basanitos e tefritos): estudo de diques relacionados ao magmatismo cretáceo no sudeste da Plataforma Brasileira

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Ao meu orientador Rogério por ter me dado a oportunidade de aprender, pelos longos períodos de dedicação, apoio, paciência, compreensão, conversas esclarecedoras, compartilhamento de experiências e amizade. Agradeço também por ter sugerido o tema com que trabalhei durante o mestrado que foi bastante desafiador e respondeu as minhas expectativas.À FAPESP por ter acreditado no meu projeto e por fornecer subsídios para o desenvolvimento do trabalho.Ao professor Excelso Ruberti por apoiar a minha pesquisa e integrar o meu trabalho de mestrado ao projeto.A Província Magmática Paraná-Etendeka no Brasil: relações temporais e petrológicas entre o magmatismo toleítico e alcalino e suas implicações geodinâmicas Ao professor Gaston por me atender pacientemente nas minhas visitas repentinas a sua sala para esclarecimento de dúvidas.Aos professores Adriana, Eliane, Lucelene, Daniel, Fábio, Gergely, Renato, Silvio pela boa recepção e por fazerem a minha passagem pelo Instituto de Geociências da USP mais agradável.Aos jovens da sala (B9) Caio, Felix, Laísa, Pedro (também), Rafaela e Vanessa pelos momentos de descontração e amizade.

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Current literature in mass spectrometry

2009

J. Mass Spectrom.

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Trace elements in minerals as indicators of the evolution of alkaline ultrabasic dike series: LA-ICP-MS data for the magmatic provinces of northeastern Fennoscandia and Germany

Cited by 32 publications

References 54 publications

Apatite in carbonatitic rocks: Compositional variation, zoning, element partitioning and petrogenetic significance

Apatite in carbonatitic rocks: Compositional variation, zoning, element partitioning and petrogenetic significance

Coeficientes de partição de elementos traços entre minerais máficos (clinopiroxênio e olivina) e líquidos ultrabásicos alcalinos (basanitos e tefritos): estudo de diques relacionados ao magmatismo cretáceo no sudeste da Plataforma Brasileira

Current literature in mass spectrometry

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