Results 11 to 20 of about 262 (125)

Trends in Ocean S‐Isotopes May Be Influenced by Major LIP Events

open access: yesGeophysical Monograph Series, Page 341-376., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Ross. R. Large   +5 more
wiley  

+9 more sources

Red to Green: A Lipid Biomarker Record of Tonian-Ediacaran Algae in Siberia. [PDF]

open access: yesGeobiology
ABSTRACT Multiple lines of evidence point to a major diversification of Eukarya in the late Tonian period, ca. 800–720 Ma ago. Regular steranes, lipid biomarkers primarily sourced from eukaryotes, are first unambiguously reported from multiple sites. Here, we present lipid biomarker stratigraphic records from two drill‐cores from the Lena‐Anabar Basin ...
Rizzo AI   +7 more
europepmc   +2 more sources

Uranium Isotope Evidence for Persistent Global Ocean Anoxia Across the Ediacaran-Cambrian Transition in Siberia. [PDF]

open access: yesGeobiology
ABSTRACT The enigmatic Ediacara biota represents Earth's earliest example of macroscopic, complex life, yet the driving forces promoting their mid‐Ediacaran evolution and subsequent extinction across the Ediacaran–Cambrian boundary remain speculative. If these were true animals requiring oxygen for aerobic respiration, their rise has often been linked ...
Doerrler AD   +10 more
europepmc   +2 more sources

Cambrian/Ordovician boundary as a milestone in the sedimentation history of the southern Siberian craton: Evidence from U-Pb dating of detrital zircons

open access: yesJournal of Asian Earth Sciences: X, 2022
The paper presents petrographic, geochemical, and new U-Pb zircon (LA-ICP-MS) geochronological data on the Upper Lena Fm. sediments which make part of the Cambrian sedimentary cover of the Siberian craton.
Dmitrii P. Gladkochub   +4 more
doaj   +1 more source

Sedimentology and stratigraphic correlation of Vendian deposits in the southwestern Siberian Craton: Major contribution of an exocratonic clastic source to sedimentary systems

open access: yesЛитосфера, 2018
The study focuses on the sedimentation and stratigraphy of a large Vendian (Ediacaran) sedimentary basin in the southwestern Siberian craton, with implications for the origin of its units and subunits.
Julius K. Sovetov
doaj   +1 more source

Enlargement of the area of the Timpton Large Igneous Province (ca. 1.75 ga) of the Siberian craton

open access: yesГеодинамика и тектонофизика, 2019
We present new geochronological data on dolerites from the Chaya dyke swarm of the Baikal inlier of the Siberian craton. The U‐Pb dating of baddeleyite from one dyke located at the SW end of the Chaya dyke swarm yielded an age of 1752±6 Ma, similar to ...
D. P. Gladkochub   +5 more
doaj   +1 more source

THE EARLY PALEOZOIC BASITE MAGMATISM IN THE NORTHEASTERN SIBERIAN CRATON

open access: yesГеодинамика и тектонофизика, 2016
The Early Cambrian tectonomagmatic activation is manifested in the northeastern passive margin of the Siberian Craton within the area of the Olenek uplift, as well as in the Kharaulakh segment of the Verkhoyansk fold‐ thrust belt that was thrusted onto ...
A. I. Kiselev   +4 more
doaj   +1 more source

LYSAN ALKALINE-ULTRABASIC COMPLEX (EASTERN SAYAN): AGE AND GEODYNAMIC CONSEQUENCES

open access: yesГеодинамика и тектонофизика, 2022
This paper presents new ideas about the formational identity, as well as the first data on the age of formation of rocks within the Lysan intrusive complex located at junction of the Derbin block and the Sisim-Kazyr zone of the Central Asian folded belt.
A. S. Mekhonoshin   +2 more
doaj   +1 more source

LATE CENOZOIC VOLCANISM OF THE UDA RIVER AREA (EASTERN SAYAN, SIBERIA): THE FIRST GEOCHEMICAL AND ISOTOPIC DATA

open access: yesГеодинамика и тектонофизика, 2017
Volcanic eruptions within the Baikal rift of predominantly basaltic composition belong to numerous small-volume eruptions, which took place in Cenozoic in Central Asia.
E. I. Demonterova   +2 more
doaj   +1 more source

DEEP-SEATED BOUNDARY STRUCTURES OF THE SIBERIAN CRATON AND THE BAIKAL-PATOM FOLD-AND-THRUST BELT IN THE CROSS-SECTION OF THE 1-SB-VOSTOCHNY PROFILE AND ITS CONTINUATION ALONG THE VITIM RIVER

open access: yesГеодинамика и тектонофизика
The deep-seated boundary structures of the Siberian craton and the Baikal-Patom fold-and-thrust belt have been considered in the cross-section of the 1-SB-Vostochny reference geophysical profile and its continuation along the Vitim River.
L. V. Kungurtsev   +3 more
doaj   +1 more source

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