Migration of Radiogenic Helium in the Crystal Structure of Sulfides and Prospects of Their Isotopic Dating
- Authors: Yakubovich O.V.1,2, Gedz A.M.1,2, Vikentyev I.V.3, Kotov A.B.1, Gorokhovskii B.M.1
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Affiliations:
- Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences
- Institute of Earth Sciences, St. Petersburg State University
- Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences
- Issue: Vol 27, No 1 (2019)
- Pages: 59-78
- Section: Article
- URL: https://journals.rcsi.science/0869-5911/article/view/177664
- DOI: https://doi.org/10.1134/S0869591118050089
- ID: 177664
Cite item
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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About the authors
O. V. Yakubovich
Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences; Institute of Earth Sciences, St. Petersburg State University
Author for correspondence.
Email: olya.v.yakubovich@gmail.com
Russian Federation, St. Petersburg, 199034; St. Petersburg, 199034
A. M. Gedz
Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences; Institute of Earth Sciences, St. Petersburg State University
Email: olya.v.yakubovich@gmail.com
Russian Federation, St. Petersburg, 199034; St. Petersburg, 199034
I. V. Vikentyev
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry,Russian Academy of Sciences
Email: olya.v.yakubovich@gmail.com
Russian Federation, Moscow, 119017
A. B. Kotov
Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences
Email: olya.v.yakubovich@gmail.com
Russian Federation, St. Petersburg, 199034
B. M. Gorokhovskii
Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences
Email: olya.v.yakubovich@gmail.com
Russian Federation, St. Petersburg, 199034