Results of U–Pb LA–ICP–MS dating of detrital zircons from Ediacaran–Early Cambrian deposits of the eastern part of the Baltic monoclise


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Аннотация

Here we present the results of U–Pb LA–ICP–MS dating of detrital zircons from the Ediacaran–Early Cambrian deposits of the eastern part of the Baltic monoclise (Leningrad Region). The obtained age spectra of the detrital zircons suggest that, in the Ediacaran–Early Cambrian, the main clastic material source to the northwest of the Russian Platform was the Baltic Shield. Then in the Early Cambrian along with the Baltic Shield provenance, a clastic source from the Timanian margin of Baltica (northeast in modern coordinates) contributed to the deposits. The obtained data either somewhat set limits of the Timanian orogen formation as older than the previously suggested Middle Cambrian (about 510 Ma), based on the “absence of a Proto–Uralian–Timanian provenance signal” in the Sablino Formation rocks in the south Ladoga, or suggest another rearrangement of detritus transportation paths at the end of Stage 3 (Atdabanian).

Авторлар туралы

A. Ivleva

St. Petersburg State University

Хат алмасуға жауапты Автор.
Email: ias.ivleva@gmail.com
Ресей, St. Petersburg

V. Podkovyrov

Institute of Precambrian Geology and Geochronology

Email: ias.ivleva@gmail.com
Ресей, St. Petersburg

V. Ershova

St. Petersburg State University

Email: ias.ivleva@gmail.com
Ресей, St. Petersburg

O. Anfinson

University of Texas at Austin

Email: ias.ivleva@gmail.com
АҚШ, Austin, Texas

A. Khudoley

St. Petersburg State University

Email: ias.ivleva@gmail.com
Ресей, St. Petersburg

P. Fedorov

St. Petersburg State University

Email: ias.ivleva@gmail.com
Ресей, St. Petersburg

A. Maslov

Institute of Geology and Geochemistry

Email: ias.ivleva@gmail.com
Ресей, Pochtovy per. 7, Yekaterinburg, 620151

D. Zdobin

St. Petersburg State University

Email: ias.ivleva@gmail.com
Ресей, St. Petersburg

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