Trace elements in minerals of the Khibiny Massif as indicators of mineral formation evolution: Results of LA-ICP-MS study

A. A. Arzamastsev, F. Bea, L. V. Arzamastseva, P. Montero

Research output

7 Citations (Scopus)

Abstract

The REE, LILE and HFSE contents in minerals from silicate alkaline rocks of the Khibiny intrusions (nepheline syenites and foidolites) were first measured by a laser ablation microprobe with inductively coupled plasma mass spectrometry. The contents of Y, Li, Rb, Ba, Th, U, Ta, Nb, Sr, Hf, Zr, Pb, Be, Sc, V, Cr, Ni, Co, Cu, Zn, Ga, Mo, Sn, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu were measured in K-feldspar, nepheline, clinopyroxene, amphibole, eudialite, lamprophyllite, apatite, titanite, and perovskite. Compositional variations in minerals originating at different stages of the massif formation indicate significant trace-element redistribution between coexisting phases during crystallization and subsequent alterations. It was shown that REE, Y, Zr, Hf, V, and Sr, which are abundant in the early magmatic minerals, primarily, clinopyroxene, are accumulated in accessory minerals (Ba lamprophyllite, eudialite, and late apatite and titanite) during late magmatic processes. Lithophile elements and Ga, which are evenly scattered over all early magmatic minerals, are partitioned in a single postmagmatic leucocratic mineral, microcline, during rock recrystallization. The co-crystallization coefficients obtained in our study for coexisting perovskite + aptite and apatite + titanite indicate predominant REE incorporation in apatite rather than in titanite, which is of decisive significance for geochemistry of economic-grade titanite-apatite-nepheline ores.

Original languageEnglish
Pages (from-to)80-95
Number of pages16
JournalGeochemistry International
Volume43
Issue number1
Publication statusPublished - 1 Jan 2005
Externally publishedYes

Fingerprint

inductively coupled plasma mass spectrometry
Trace Elements
titanite
Apatites
trace elements
apatite
Minerals
apatites
minerals
trace element
nepheline
mineral
rare earth element
perovskite
clinopyroxene
Crystallization
crystallization
Amphibole Asbestos
Rocks
microcline

Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

Cite this

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title = "Trace elements in minerals of the Khibiny Massif as indicators of mineral formation evolution: Results of LA-ICP-MS study",
abstract = "The REE, LILE and HFSE contents in minerals from silicate alkaline rocks of the Khibiny intrusions (nepheline syenites and foidolites) were first measured by a laser ablation microprobe with inductively coupled plasma mass spectrometry. The contents of Y, Li, Rb, Ba, Th, U, Ta, Nb, Sr, Hf, Zr, Pb, Be, Sc, V, Cr, Ni, Co, Cu, Zn, Ga, Mo, Sn, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu were measured in K-feldspar, nepheline, clinopyroxene, amphibole, eudialite, lamprophyllite, apatite, titanite, and perovskite. Compositional variations in minerals originating at different stages of the massif formation indicate significant trace-element redistribution between coexisting phases during crystallization and subsequent alterations. It was shown that REE, Y, Zr, Hf, V, and Sr, which are abundant in the early magmatic minerals, primarily, clinopyroxene, are accumulated in accessory minerals (Ba lamprophyllite, eudialite, and late apatite and titanite) during late magmatic processes. Lithophile elements and Ga, which are evenly scattered over all early magmatic minerals, are partitioned in a single postmagmatic leucocratic mineral, microcline, during rock recrystallization. The co-crystallization coefficients obtained in our study for coexisting perovskite + aptite and apatite + titanite indicate predominant REE incorporation in apatite rather than in titanite, which is of decisive significance for geochemistry of economic-grade titanite-apatite-nepheline ores.",
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T2 - Results of LA-ICP-MS study

AU - Arzamastsev, A. A.

AU - Bea, F.

AU - Arzamastseva, L. V.

AU - Montero, P.

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N2 - The REE, LILE and HFSE contents in minerals from silicate alkaline rocks of the Khibiny intrusions (nepheline syenites and foidolites) were first measured by a laser ablation microprobe with inductively coupled plasma mass spectrometry. The contents of Y, Li, Rb, Ba, Th, U, Ta, Nb, Sr, Hf, Zr, Pb, Be, Sc, V, Cr, Ni, Co, Cu, Zn, Ga, Mo, Sn, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu were measured in K-feldspar, nepheline, clinopyroxene, amphibole, eudialite, lamprophyllite, apatite, titanite, and perovskite. Compositional variations in minerals originating at different stages of the massif formation indicate significant trace-element redistribution between coexisting phases during crystallization and subsequent alterations. It was shown that REE, Y, Zr, Hf, V, and Sr, which are abundant in the early magmatic minerals, primarily, clinopyroxene, are accumulated in accessory minerals (Ba lamprophyllite, eudialite, and late apatite and titanite) during late magmatic processes. Lithophile elements and Ga, which are evenly scattered over all early magmatic minerals, are partitioned in a single postmagmatic leucocratic mineral, microcline, during rock recrystallization. The co-crystallization coefficients obtained in our study for coexisting perovskite + aptite and apatite + titanite indicate predominant REE incorporation in apatite rather than in titanite, which is of decisive significance for geochemistry of economic-grade titanite-apatite-nepheline ores.

AB - The REE, LILE and HFSE contents in minerals from silicate alkaline rocks of the Khibiny intrusions (nepheline syenites and foidolites) were first measured by a laser ablation microprobe with inductively coupled plasma mass spectrometry. The contents of Y, Li, Rb, Ba, Th, U, Ta, Nb, Sr, Hf, Zr, Pb, Be, Sc, V, Cr, Ni, Co, Cu, Zn, Ga, Mo, Sn, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu were measured in K-feldspar, nepheline, clinopyroxene, amphibole, eudialite, lamprophyllite, apatite, titanite, and perovskite. Compositional variations in minerals originating at different stages of the massif formation indicate significant trace-element redistribution between coexisting phases during crystallization and subsequent alterations. It was shown that REE, Y, Zr, Hf, V, and Sr, which are abundant in the early magmatic minerals, primarily, clinopyroxene, are accumulated in accessory minerals (Ba lamprophyllite, eudialite, and late apatite and titanite) during late magmatic processes. Lithophile elements and Ga, which are evenly scattered over all early magmatic minerals, are partitioned in a single postmagmatic leucocratic mineral, microcline, during rock recrystallization. The co-crystallization coefficients obtained in our study for coexisting perovskite + aptite and apatite + titanite indicate predominant REE incorporation in apatite rather than in titanite, which is of decisive significance for geochemistry of economic-grade titanite-apatite-nepheline ores.

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