Cretaceous and Jurassic intrusions in Crimean Mountains: The first data of U–Pb (SIMS SHRIMP) dating


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U–Pb geochronological studies of igneous rocks of the Crimean Mountains were carried out for the first time. The ages of magma crystallization determined for gabbro–dolerites of the Dzhidair and Pervomaiskii intrusions point to the injection of these rocks during the Middle Jurassic Aalenian–Bajocian stage of magmatism. The Berriasian–Valanginian and Aptian age of sill-like bodies within the mass of volcanogenic–sedimentary rocks presumes the necessity to reconsider the common notion of an exclusively Albian magmatic event during the Cretaceous. High-precision U–Pb dating of magma intrusions allowed us to verify the age of Middle Jurassic magmatism and to distinguish the new Early Cretaceous Berriasian–Valanginian magmatism stage of basic composition.

Sobre autores

E. Morozova

Institute of Earth Sciences

Autor responsável pela correspondência
Email: varvarans@mail.ru
Rússia, St. Petersburg

S. Sergeev

Institute of Earth Sciences; Karpinsky Russian Geological Research Institute (VSEGEI)

Email: varvarans@mail.ru
Rússia, St. Petersburg; St. Petersburg, 199106

A. Savelev

Institute of Earth Sciences

Email: varvarans@mail.ru
Rússia, St. Petersburg

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