Migration of Radiogenic Helium in the Crystal Structure of Sulfides and Prospects of Their Isotopic Dating

O. V. Yakubovich, A. M. Gedz, I. V. Vikentyev, A. B. Kotov, B. M. Gorokhovskii

Research output

1 Citation (Scopus)

Abstract

Abstract: The migration of helium from the crystal lattices of sulfides (pyrite, pyrrhotite, chalcopyrite, bornite, and sphalerite) and sulfosalts (tennantite and tetrahedrite) was studied. It was shown that helium occurs in submicrometer inclusions of uranium- and thorium-bearing minerals. The curves of helium thermal desorption from the sulfide and sulfosalts were obtained by the step-heating method and analyzed on the basis of the single-jump migration model. The interpretation of these data led to the conclusion on the possibility of the U–Th–He dating of pyrite. It was shown that the migration parameters of helium in the other sulfides and sulfosalts are not suitable for their potential use as U–Th–He geochronometer. Based on a comparison of data on helium migration in various minerals, it was suggested that high helium retentivity in some sulfides and arsenides (pyrite and sperrylite) is related to the type of their crystal lattice, packing density, and specific electric resistivity.

Original languageEnglish
Pages (from-to)59-78
Number of pages20
JournalPetrology
Volume27
Issue number1
DOIs
Publication statusPublished - 1 Jan 2019

Fingerprint

Helium
Sulfides
crystal structure
helium
Crystal structure
sulfide
sulfosalt group
pyrite
Crystal lattices
Minerals
Bearings (structural)
crystal
Thorium
tennantite
tetrahedrite
bornite
Thermal desorption
Uranium
Electric conductivity
thorium

Scopus subject areas

  • Geochemistry and Petrology

Cite this

Yakubovich, O. V. ; Gedz, A. M. ; Vikentyev, I. V. ; Kotov, A. B. ; Gorokhovskii, B. M. / Migration of Radiogenic Helium in the Crystal Structure of Sulfides and Prospects of Their Isotopic Dating. In: Petrology. 2019 ; Vol. 27, No. 1. pp. 59-78.
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Migration of Radiogenic Helium in the Crystal Structure of Sulfides and Prospects of Their Isotopic Dating. / Yakubovich, O. V.; Gedz, A. M.; Vikentyev, I. V.; Kotov, A. B.; Gorokhovskii, B. M.

In: Petrology, Vol. 27, No. 1, 01.01.2019, p. 59-78.

Research output

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AU - Yakubovich, O. V.

AU - Gedz, A. M.

AU - Vikentyev, I. V.

AU - Kotov, A. B.

AU - Gorokhovskii, B. M.

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N2 - Abstract: The migration of helium from the crystal lattices of sulfides (pyrite, pyrrhotite, chalcopyrite, bornite, and sphalerite) and sulfosalts (tennantite and tetrahedrite) was studied. It was shown that helium occurs in submicrometer inclusions of uranium- and thorium-bearing minerals. The curves of helium thermal desorption from the sulfide and sulfosalts were obtained by the step-heating method and analyzed on the basis of the single-jump migration model. The interpretation of these data led to the conclusion on the possibility of the U–Th–He dating of pyrite. It was shown that the migration parameters of helium in the other sulfides and sulfosalts are not suitable for their potential use as U–Th–He geochronometer. Based on a comparison of data on helium migration in various minerals, it was suggested that high helium retentivity in some sulfides and arsenides (pyrite and sperrylite) is related to the type of their crystal lattice, packing density, and specific electric resistivity.

AB - Abstract: The migration of helium from the crystal lattices of sulfides (pyrite, pyrrhotite, chalcopyrite, bornite, and sphalerite) and sulfosalts (tennantite and tetrahedrite) was studied. It was shown that helium occurs in submicrometer inclusions of uranium- and thorium-bearing minerals. The curves of helium thermal desorption from the sulfide and sulfosalts were obtained by the step-heating method and analyzed on the basis of the single-jump migration model. The interpretation of these data led to the conclusion on the possibility of the U–Th–He dating of pyrite. It was shown that the migration parameters of helium in the other sulfides and sulfosalts are not suitable for their potential use as U–Th–He geochronometer. Based on a comparison of data on helium migration in various minerals, it was suggested that high helium retentivity in some sulfides and arsenides (pyrite and sperrylite) is related to the type of their crystal lattice, packing density, and specific electric resistivity.

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