Ранненеопротерозойские (~920 млн лет) гранито-гнейсы Джунгарского Алатау, Южный Казахстан: обоснование возраста по результатам U–Th–Pb (SIMS)-датирования

Алексеев, Д. В.; Дегтярев, К. Е.; Третьяков, А. А.; Каныгина, Н. А.

doi:10.31857/s2686739721010035

Докл. РАН. Науеи о Земле

2021

DOI: 10.31857/s2686739721010035

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Ранненеопротерозойские (~920 млн лет) гранито-гнейсы Джунгарского Алатау, Южный Казахстан: обоснование возраста по результатам U–Th–Pb (SIMS)-датирования

Д. В. Алексеев¹,

К. Е. Дегтярев²,

А. А. Третьяков³

et al.

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2024

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Geological position of the Junggar terrane (Southern Kazakhstan) in the structure of Rodinia supercontinent: results of research of the late-precambrian metasedimentary complexes

Kanygina,

Tretyakov,

Degtyarev

et al. 2024

Geotektonika

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The results of studying of the Precambrian metasedimentary sequences of the Junggar terrane located in South Kazakhstan are given in the article. In the structure of the Junggar terrane, we studied the rocks of the Sarychebyn group and Kosagash formation. Petrogeochemical data combined with the results of U‒Pb and Lu‒Hf isotope-geochronological studies of the detrital zircons showed that the Sarychebyn Group and the Kosagash formation represent a similar stratigraphic level that accumulation occurred in the Late Mesoproterozoic to Early Neoproterozoic (~1026‒~920 Ma). The main sources of the detrital zircon age populations were the Mesoproterozoic and Paleoproterozoic complexes. Among these complexes can be identified metabasites and metapelites of intermediate and high metamorphic grades, as well as felsic igneous rocks formed with the participation of various sources, can be distinguished. The Junggar terrane exhibits a close tectonic affinity with the Aktau-Mointy, Yili, Issyk-Kul, Chinese Central Tien-Shan, and the Northern Kazakhstan terranes in the Late Precambrian. They were probably located near the Sveconorwegian orogen in the western Baltica within the Rodinia supercontinent structure.

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Geological position of the Junggar terrane (Southern Kazakhstan) in the structure of Rodinia supercontinent: results of research of the late-precambrian metasedimentary complexes

Kanygina,

Tretyakov,

Degtyarev

et al. 2024

Geotektonika

View full text Add to dashboard Cite

show abstract

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Ранненеопротерозойские (~920 млн лет) гранито-гнейсы Джунгарского Алатау, Южный Казахстан: обоснование возраста по результатам U–Th–Pb (SIMS)-датирования

Cited by 1 publication

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Geological position of the Junggar terrane (Southern Kazakhstan) in the structure of Rodinia supercontinent: results of research of the late-precambrian metasedimentary complexes

Geological position of the Junggar terrane (Southern Kazakhstan) in the structure of Rodinia supercontinent: results of research of the late-precambrian metasedimentary complexes

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