A5061530213- Geological and Geochemical Analysis
- Geological Studies and Exploration
- Geochemistry and Geologic Mapping
- High-pressure geophysics and materials
Novosibirsk State University
2019-2023
Institute of Petroleum Geology and Geophysics
2019-2023
We present the first comprehensive data for early Ediacaran stage of evolution western active continental margin Siberian Craton (Yenisei Ridge). U-Pb (SHRIMP-II SIMS) zircons from dikes picrodolerites, quartz diorites, and leucocratic granites show that they were emplaced at 625 ± 5, 623 8, 626 5 Ma, respectively, which indicates a narrow time window magmatic events. The mafic tholeiitic rocks have OIB E-MORB mantle components in their sources. Mineralogical geochemical observations showed...
We consider the evolution of A-type granite magmatism in Cryogenian period during tectonic transformation Yenisei Ridge from a postcollisional setting to early development stage an active continental margin. report geochronological and geochemical data for granites two intrusions – Strelka pluton belonging Glushikha complex (752–718 Ma) Yagodka Tatarka margin (711–629 Ma). The new U-Pb Ar/Ar plutons indicates that age intervals these complexes can be combined, showing uninterrupted change region.
An Ediacaran complex of dyke rocks has been identified for the first time in Yenisei Ridge orogen. These igneous are represented by basic, intermediate and acid variants formed conditions transform active continental margin at stages its development before during interruption subduction slab breakoff: from dykes picrodolerite - dolerite-quartz diorite leucogranite association with age range 626-623 Ma (U-Th-U isotope data zircons, SHRIMP-II method, this work) up to adakite...