First Results of Study of Detrital Zircons from Late Precambrian Quartzite–Schist Sequences of the Aktau–Mointy Block, Central Kazakhstan
- Authors: Kanygina N.A.1, Tretyakov A.A.1, Kovach V.P.2, Degtyarev K.E.1, Wang K.3, Kotov A.B.2
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Affiliations:
- Geological Institute
- Institute of Precambrian Geology and Geochronology
- Institute of Earth Sciences
- Issue: Vol 479, No 1 (2018)
- Pages: 320-323
- Section: Geology
- URL: https://journals.rcsi.science/1028-334X/article/view/192437
- DOI: https://doi.org/10.1134/S1028334X18030261
- ID: 192437
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Abstract
For the first time, the U–Pb age is determined for detrital zircons of quartzite–schist sequences, which are part of the Precambrian basement of the Aktau–Mointy Block (Central Kazakhstan) along with Neoproterozoic felsic volcanic (925–920 Ma) and granitic (945–917 Ma) rocks [6]. We analyzed 219 zircon grains from small-grained quartzites of the northern part of the block (Mt. Bol’shoi Alabas) including 206 grains with concordant age (1149–1273, 1276–1975, 2354–2592 Ma). These ages indicate the Mesoproterozoic, Paleoproterozoic, and Neoarchean rocks as provenances. The youngest statistically significant age peak of 1209 Ma indicates that the quartzite–schist sequences accumulated 1200–900 Ma ago (at the end of the Mesoproterozoic and beginning of the Neoproterozoic) prior to the formation of the Early Neoproterozoic felsic rocks and granites.
About the authors
N. A. Kanygina
Geological Institute
Email: degtkir@mail.ru
Russian Federation, Moscow, 119017
A. A. Tretyakov
Geological Institute
Email: degtkir@mail.ru
Russian Federation, Moscow, 119017
V. P. Kovach
Institute of Precambrian Geology and Geochronology
Email: degtkir@mail.ru
Russian Federation, St. Petersburg, 199034
K. E. Degtyarev
Geological Institute
Author for correspondence.
Email: degtkir@mail.ru
Russian Federation, Moscow, 119017
Kuo-Lun Wang
Institute of Earth Sciences
Email: degtkir@mail.ru
Taiwan, Province of China, Taipei, 11529
A. B. Kotov
Institute of Precambrian Geology and Geochronology
Email: degtkir@mail.ru
Russian Federation, St. Petersburg, 199034