U-Pb LA-ICP-MS Age of Detrital Zircons from the Lower Riphean and Upper Vendian Deposits of the Luga-Ladoga Monocline

被引：8
|
作者：
Ivleva, A. S. [1 ]
Podkovyrov, V. N. [2 ]
Ershova, V. B. [1 ]
Khubanov, V. B. [3 ]
Khudoley, A. K. [1 ]
Sychev, S. N. [1 ]
Vdovina, N. I. [1 ]
Maslov, A. V. [4 ]
机构：
[1] St Petersburg State Univ, St Petersburg 199034, Russia
[2] Russian Acad Sci, Inst Precambrian Geol & Geochronol, St Petersburg 199034, Russia
[3] Russian Acad Sci, Geol Inst, Siberian Branch, Ulan Ude 670047, Russia
[4] Russian Acad Sci, Inst Geol & Geochem, Ural Branch, Ekaterinburg 620016, Russia
来源：
DOKLADY EARTH SCIENCES | 2018年 / 480卷 / 02期
基金：
俄罗斯基础研究基金会;
关键词：
BALTIC SHIELD; PART;
D O I：
10.1134/S1028334X1806003X
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
The results of LA-ICP-MS U-Pb analyses of detrital zircons from the Precambrian deposits of Luga-Ladoga monocline are discussed. The age spectra of the zircons separated from the Riphean to Upper Vendian sandstones from the Shotkusa-1 well demonstrate dominance of the Paleo- and Mesoproterozoic grains while the Archaean zircons are subordinate. The Riphean debris sources were local swells of the Northern Ladoga basement. The sequence interval presumably corresponding to the Vasilieostrov Formation (Upper Vendian) has yielded not only Paleo- and Mesoproterozoic zircon ages, but Neoproterozoic as well, implying a Timanide provenance: these zircons (527 +/- 9 and 516 +/- 13 Ma) allow deposition of a significant part of the Shotkusa-1 sequence at the very beginning of the Cambrian.
引用
收藏
页码：695 / 699
页数：5
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