The Lower Boundary of the Vendian in the Southern Urals as Evidenced by the Rb–Sr Age of Glauconites of the Bakeevo Formation

Zaitseva, Т. S.; Кузнецов, А. Б.; Горожанин, В. М.; Горохов, И. М.; Ivanovskaya, T. A.; Константинова, Г. В.

doi:10.1134/s0869593819050083

Cited by 27 publications

(8 citation statements)

References 36 publications

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“…LAURENTIA: (5) Kendall et al (2004); (17) Rooney et al (2015); (26) Dempster et al (2002); (27) Rooney et al (2011); (28) Rooney et al (2014); (29) Isakson (2017); (30) Keeley et al (2013); (31) Condon and Bowring (2011); (32) Lund et al (2003); (33) Eyster et al (2018); (34) Baldwin et al (2016); (35) Denyszyn et al (2009); (36) Cox et al (2018a); (37) Denyszyn et al (2009); (38) Macdonald et al (2010); (39) Macdonald et al (2018); (40) Cox et al (2015); (41) McDonough and Parrish (1991); (42) Strauss et al (2014); (43) Fetter and Goldberg (1995); (44) Karlstrom et al (2000); (45) Ross and Villeneuve (1997); (46) Aleinikoff et al (1995); (47) Jefferson and Parrish (1989). BALTICA: (48) Zaitseva et al (2019); (49) Krasnobaev et al (2019); (50) Środoń et al (2022) SIBERIA: (51) Kochnev et al (2015); (52) Rud‘ko et al (2020). MONGOLIA: (17) Rooney et al (2015).…”

Section: Geological Backgroundmentioning

confidence: 99%

Geochronology and formal stratigraphy of the Sturtian Glaciation in the Adelaide Superbasin

et al. 2023

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The glaciogenic nature of the Yudnamutana Subgroup was first recognized over a century ago, and its global significance was recognized shortly after, with the eventual postulation of a global Sturtian Glaciation and Snowball Earth theory. Much debate on the origin and timing of these rocks, locally and globally, has ensued in the years since. A significant corpus of research on the lithology, sedimentology, geochronology and formal lithostratigraphy of these sequences globally has attempted to resolve many of these debates. In the type area for the Sturtian Glaciation, South Australia’s Adelaide Superbasin, the lithostratigraphy and sedimentology are well understood; however, formal stratigraphic nomenclature has remained complicated and contested. Absolute dates on the stratigraphy are also extremely sparse in this area. The result of these longstanding issues has been disagreement as to whether the sedimentary rocks of the Yudnamutana Subgroup are truly correlative throughout South Australia, and if they were deposited in the same time span recently defined for Sturtian glacial rocks globally, c. 717 Ma to c. 660 Ma. This study presents a large detrital zircon study, summarizes and compiles existing global geochronology for the Sturtian Glaciation and revises the formal lithostratigraphic framework of the Yudnamutana Subgroup. We show equivalence of the rocks that comprise the revised Sturt Formation, the main glaciogenic unit of the Yudnamutana Subgroup, and that it was deposited within the time span globally defined for the Sturtian Glaciation.

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Section: Geological Backgroundmentioning

confidence: 99%

Geochronology and formal stratigraphy of the Sturtian Glaciation in the Adelaide Superbasin

et al. 2023

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“…Определен возраст базальных горизонтов венда на Южном Урале, установленный на основе Rb-Sr датирования осадочных глауконитов бакеевской свиты ашинской серии 642±9 млн лет [Zaitseva et al, 2019]. Реконструирована история заполнения позднерифейского палеобассейна на основе Rb-Sr и Sm-Nd изотопного исследования тонкодисперсных слоистых силикатов в разноразмерных фракциях инзерской свиты Южного Урала [Gorokhov et al, 2019b].…”

Section: результатыunclassified

«AIRES» SHARED RESEARCH FACILITIES (IPGG RAS, St. PETERSBURG): SCIENTIFIC EQUIPMENT, MAIN RESEARCH DIRECTIONS AND RESULTS

Кузнецов

Zaitseva

Сальникова

2022

Geodin. tektonofiz.

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The "AIRES" Shared Research Facilities (SRF) is a high-tech laboratory complex based on the Institute of Precambrian Geology and Geochronology RAS (IPGG RAS, St. Petersburg). The Institute conducts geological, mineralogical, geochronological, isotope-geochemical and paleontological studies aimed at solving the problems of the formation and evolution of the Earth's continental crust in the Precambrian and Phanerozoic. The methodological developments of the "AIRES" SRF make it possible to interpret the conditions of occurrence of igneous, metamorphic and sedimentary rocks and minerals, as well as their age. The ongoing research includes studies on geology, geodynamics, stratigraphy, petrology, lithology, isotope geochemistry, geochronology, as well as paleogeography, archeology, soil science, ecology, and chemistry.

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“…1): lower (Burzyanian, 1750-1400 Ma), middle (Yurmatinian, 1400-1030 ± 30 Ma), upper (Karatavian, 1030 ± 30-770 Ma), and end (Arshinian, 770-640 Ma) (Puchkov, 2010;Puchkov et al, 2017). The Vendian sediments overlying the Riphean rocks in the composition of tillites and terrigenous Asha Group were deposited 640-548 Ma (Grazhdankin et al, 2011;Zaitseva et al, 2019). The Riphean series has a regular structure with a coarseclastic base and terrigenous-carbonate fill in the middle and upper parts.…”

Section: Geology Of the Depositsmentioning

confidence: 99%

The Source of Ore Fluids and Sm–Nd Age of Siderite from the Largest Bakal Deposit, Southern Urals

et al. 2021

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Abstract— Based on Sm–Nd data, a crustal source of iron-ore fluid was substantiated and the probability of age estimation for hydrothermal–metasomatic siderite of the Bakal Group, Southern Urals, was shown for the first time. The εNd (Т) values of siderite (from –13.4 to –17.6) plot in the field of Riphean shale and not the Precambrian rift gabbro and granite of this region. The obtained Sm–Nd age of the Bakal siderite is 970 ± 40 Ma, which is consistent with the Pb–Pb age of siderite from the major ore phase (~1000 Ma). The established age boundary coincides with tectonic restructuring, including the formation of a number of barite–polymetallic deposits, as well as ferruginous magnesite and fluorite in the Riphean deposits on the western slope of the Southern Urals.

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The Lower Boundary of the Vendian in the Southern Urals as Evidenced by the Rb–Sr Age of Glauconites of the Bakeevo Formation

Cited by 27 publications

References 36 publications

Geochronology and formal stratigraphy of the Sturtian Glaciation in the Adelaide Superbasin

Geochronology and formal stratigraphy of the Sturtian Glaciation in the Adelaide Superbasin

«AIRES» SHARED RESEARCH FACILITIES (IPGG RAS, St. PETERSBURG): SCIENTIFIC EQUIPMENT, MAIN RESEARCH DIRECTIONS AND RESULTS

The Source of Ore Fluids and Sm–Nd Age of Siderite from the Largest Bakal Deposit, Southern Urals

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