Petrologic-geophysical model for the structure and composition of deep levels of the Khibina and Lovozero complexes, Kola Peninsula

A. A. Arzamastsev, L. V. Arzamastseva, V. N. Glaznev, A. B. Raevskii

Research output

13 Citations (Scopus)

Abstract

The paper presents the results of complex petrologic-geophysical investigations into the structure and petrography of deep levels of the Khibina and Lovozero plutons on the Kola Peninsula. Analysis of materials obtained by deep drilling and the results of three-dimensional density modeling suggest that lower levels of the plutons bear significant volumes of rocks that are not exposed at the modern erosion level. It was determined that the plutons contain continuous rock series typical of alkaline-ultrabasic massifs of the province: peridotite, pyroxenite, melilitolite, melteigite, ijolite, and carbonatite. Rocks of the alkaline-ultrabasic series account for no less than 30 vol % of the Khibina and 25 vol % of the Lovozero Massif within the 12.5-km-depth level accessible for gravimetric studies. The agpaitic nepheline syenites in the cores of both massifs were determined to include large bodies of miaskitic syenites. Synthesis of geologic-geophysical and petrologic-geochemical data led us to develop a model for the origin of the two complexes as a result of the synchronous evolution of mantle sources, which were situated at various depths, but had a common system of magma conduits and produced both basanite-phonolitic and foiditic melts.

Original languageEnglish
Pages (from-to)434-450
Number of pages17
JournalPetrology
Volume6
Issue number5
Publication statusPublished - 1 Sep 1998
Externally publishedYes

Fingerprint

pluton
Rocks
Chemical analysis
rock
Petrography
basanite
deep drilling
nepheline
pyroxenite
carbonatite
petrography
mantle source
peridotite
Erosion
Drilling
magma
melt
erosion
modeling
analysis

Scopus subject areas

  • Geochemistry and Petrology

Cite this

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title = "Petrologic-geophysical model for the structure and composition of deep levels of the Khibina and Lovozero complexes, Kola Peninsula",
abstract = "The paper presents the results of complex petrologic-geophysical investigations into the structure and petrography of deep levels of the Khibina and Lovozero plutons on the Kola Peninsula. Analysis of materials obtained by deep drilling and the results of three-dimensional density modeling suggest that lower levels of the plutons bear significant volumes of rocks that are not exposed at the modern erosion level. It was determined that the plutons contain continuous rock series typical of alkaline-ultrabasic massifs of the province: peridotite, pyroxenite, melilitolite, melteigite, ijolite, and carbonatite. Rocks of the alkaline-ultrabasic series account for no less than 30 vol {\%} of the Khibina and 25 vol {\%} of the Lovozero Massif within the 12.5-km-depth level accessible for gravimetric studies. The agpaitic nepheline syenites in the cores of both massifs were determined to include large bodies of miaskitic syenites. Synthesis of geologic-geophysical and petrologic-geochemical data led us to develop a model for the origin of the two complexes as a result of the synchronous evolution of mantle sources, which were situated at various depths, but had a common system of magma conduits and produced both basanite-phonolitic and foiditic melts.",
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Petrologic-geophysical model for the structure and composition of deep levels of the Khibina and Lovozero complexes, Kola Peninsula. / Arzamastsev, A. A.; Arzamastseva, L. V.; Glaznev, V. N.; Raevskii, A. B.

In: Petrology, Vol. 6, No. 5, 01.09.1998, p. 434-450.

Research output

TY - JOUR

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