Sandy Sediments in the Tokko Basin of the Baikal Rift Zone: Sources and Provenance Areas

期刊论文
发表日期：

2024年5月2日

查看全文

T. M. Skovitina,
A. B. Kotov,
I. N. Buchnev,
V. P. Kovach,
S. D. Velikoslavinskii,
E. V. Tolmacheva,
E. V. Adamskaya,
O. V. Bobrovskaya,
V. A. Gorovoy

摘要

Abstract

The results of U–Th–Pb (LA–ICP–MS) geochronological studies of detrital zircon from the Quaternary sands of the Tokko Basin on the eastern flank of the Baikal Rift Zone are reported. It is shown that their main sources were Mesoarchean tonalite–trondhjemite orthogneisses and metavolcanics, as well as Meso- and Neoarchean syn- and post-collision granitoids of the Charа–Olekma geoblock of the Aldan Shield, which are located near the Tokko Basin. Moreover, the input of sedimentary material into the basin could have occurred during the melting of glaciers that covered the Udokan Ridge to the south and the Kodar Ridge to the north in the Middle–Upper Quaternary.