TY - JOUR

T1 - Hirnanti süsinikisotoopekskursioon Edela-Siberis Mägi-Altais

AU - Sennikov, Nikolay V.

AU - Ainsaar, Leho

AU - Meidla, Tõnu

PY - 2015/8/13

Y1 - 2015/8/13

N2 - The Hirnantian Isotope Carbon Excursion (HICE), a glaciation-induced positive δ13C shift in the end-Ordovician successions, has been widely used in chemostratigraphic correlation of the Ordovician–Silurian boundary beds in many areas of the world. However, large regions with Ordovician sediments in Siberia are almost unstudied for stable isotope chemostratigraphy. The Burovlyanka section in the Altai area is one of the rare Hirnantian–Rhuddanian sections with both carbonates and graptolitiferous shales occurring in the succession. Here we report the discovery of the HICE in the uppermost beds of the Tekhten' Formation, the Dalmanitina Beds in the Burovlyanka section. The Dalmanitina limestone Member between the graptolitiferous shales may correspond to the mid-Hirnantian glacial episode, which led to a global sea level drop and major extinction of marine fauna.

AB - The Hirnantian Isotope Carbon Excursion (HICE), a glaciation-induced positive δ13C shift in the end-Ordovician successions, has been widely used in chemostratigraphic correlation of the Ordovician–Silurian boundary beds in many areas of the world. However, large regions with Ordovician sediments in Siberia are almost unstudied for stable isotope chemostratigraphy. The Burovlyanka section in the Altai area is one of the rare Hirnantian–Rhuddanian sections with both carbonates and graptolitiferous shales occurring in the succession. Here we report the discovery of the HICE in the uppermost beds of the Tekhten' Formation, the Dalmanitina Beds in the Burovlyanka section. The Dalmanitina limestone Member between the graptolitiferous shales may correspond to the mid-Hirnantian glacial episode, which led to a global sea level drop and major extinction of marine fauna.

KW - Carbon isotope stratigraphy

KW - Gorny altai

KW - HICE

KW - Hirnantian

KW - Ordovician

KW - Russia

UR - http://www.scopus.com/inward/record.url?scp=84939169704&partnerID=8YFLogxK

U2 - 10.3176/earth.2015.29

DO - 10.3176/earth.2015.29

M3 - статья

AN - SCOPUS:84939169704

VL - 64

SP - 225

EP - 232

JO - Estonian Journal of Earth Sciences

JF - Estonian Journal of Earth Sciences

SN - 1736-4728

IS - 3

ER -