STRATOTYPES OF THE CAMBRIAN FORMATIONS IN THE TYNEP DEPRESSION, THE BAKHTA REGION OF THE SIBERIAN PLATFORM

N. V. Melnikov, O. S. Shabanova

Siberian Research Institute of Geology, Geophysics and Mineral Resources, Novosibirsk, Russia

In the central part of the Bakhta Region, deep wells penetrated the Toyonian, Amginian, and Mayan sections of the Cambrian System, which differ from other regions of the northern and southern parts of the Siberian Platform. The Biraminskaya series of argillaceous limestones was discovered in the Toyonian stage, and above, in the mid-Cambrian, there occurs the Imbakskaya series of limestones, overlain by the Khuringdinskaya series composed of alternating salt and dolomite members. The authors suggest ranking these series as formations. Their stratotypes have been described, their division into members is provided, and the new formations are described in details.

Key words: Siberian Platform, Bakhta megaledge, Tynep depression, Cambrian, formation, stratotype, trilobites.

DOI 10.20403/2078-0575-2017-2-25-32

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