RAS PresidiumДоклады Российской академии наук. Науки о Земле Doklady Earth Sciences

  • ISSN (Print) 2686-7397
  • ISSN (Online) 3034-5065

LATE EDIACARAN GLACIAL DEPOSITS OF THE BAYKONUR FORMATION, MIDDLE TIANSHAN OF EAST KYRGYZSTAN: AGE SUBSTANTIATION BASED ON DETRITAL ZIRCON U–Th–Pb (LA-ICP-MS) GEOCHRONOLOGICAL STUDY

PII
S30345065S2686739725030015-1
DOI
10.7868/S3034506525030015
Publication type
Article
Status
Published
Authors
Volume/ Edition
Volume 521 / Issue number 1
Pages
5-13
Abstract
The results of U-Th-Pb (LA-ICP-MS) dating of detrital zircons reveal late Ediacaran ca 556–540 Ma age of the Baykonur Formation and eponymous glaciation in the Middle Tianshan (MTS) of eastern Kyrgyzstan. The widespread occurrence of the Baykonur diamictites in Kazakhstan and the Tianshan over a distance of more than 1600 km points to a significant extent of glaciation. The association of glacial deposits with shallow-marine fine-grained siliciclastic and carbonate facies indicates lack of connection with mountain glaciers. In the Tarim Craton, which in the Precambrian represented a single continent with the MTS, the stratigraphic correlative of the Baykonur Formation is the Hankalchough diamictite which has a similar age according to chemostratigraphic data. Paleomagnetic data indicating that in the Ediacaran the Tarim and MTS located at low latitudes
Keywords
обломочный циркон U-Th–Pb-геохронологическое исследование диамиктит поздний эдиакарий Срединный Тянь-Шань
Date of publication
05.11.2024
Year of publication
2024
Number of purchasers
0
Views
63

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