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

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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. / Zaitseva, T. S.; Kuznetsov, A. B.; Gorozhanin, V. M.; Gorokhov, I. M.; Ivanovskaya, T. A.; Konstantinova, G. V.

In: Stratigraphy and Geological Correlation, Vol. 27, No. 5, 01.09.2019, p. 573-587.

Research output: Contribution to journal › Article › peer-review

Author

Zaitseva, T. S. ; Kuznetsov, A. B. ; Gorozhanin, V. M. ; Gorokhov, I. M. ; Ivanovskaya, T. A. ; Konstantinova, G. V. / The Lower Boundary of the Vendian in the Southern Urals as Evidenced by the Rb–Sr Age of Glauconites of the Bakeevo Formation. In: Stratigraphy and Geological Correlation. 2019 ; Vol. 27, No. 5. pp. 573-587.

BibTeX

@article{07fbd5a4e821432cb0cb1268116ba2dd,

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

abstract = "Abstract—: This work presents the results of the mineralogical, crystallochemical, and geochronological study of globular phyllosilicates (GPS) of glauconite–illite series from the Bakeevo Formation. This formation is the basal member of the Vendian Asha Group in the Southern Urals. The monomineral GPS fractions representing the globules varying in size and density are composed of Al-glauconite and illite. The Rb–Sr dating of the GPS of the Bakeevo Formation in combination with the modeling of cation distribution in their structure and comparison of the model data with M{\"o}ssbauer and IR spectroscopy data was performed for the first time. The Rb–Sr age of the Bakeevo glauconite is 642 ± 9 Ma. The mineralogical and geochemical characteristics in combination with model calculations show that the stratigraphic significance of this age is quite reasonable. The initial 87Sr/86Sr ratio in the glauconitization environment is 0.7080 ± 0.0009 and is consistent within the experimental error with this ratio in the Vendian seawater. Thus, the lower boundary of the Vendian in the Southern Urals has an age of about 640 Ma.",

keywords = "globular phyllosilicates, IR spectroscopy, M{\"o}ssbauer spectroscopy, Rb–Sr age, Southern Urals, Vendian",

author = "Zaitseva, {T. S.} and Kuznetsov, {A. B.} and Gorozhanin, {V. M.} and Gorokhov, {I. M.} and Ivanovskaya, {T. A.} and Konstantinova, {G. V.}",

year = "2019",

month = sep,

day = "1",

doi = "10.1134/S0869593819050083",

language = "English",

volume = "27",

pages = "573--587",

journal = "Stratigraphy and Geological Correlation",

issn = "0869-5938",

publisher = "МАИК {"}Наука/Интерпериодика{"}",

number = "5",

}

RIS

TY - JOUR

T1 - The Lower Boundary of the Vendian in the Southern Urals as Evidenced by the Rb–Sr Age of Glauconites of the Bakeevo Formation

AU - Zaitseva, T. S.

AU - Kuznetsov, A. B.

AU - Gorozhanin, V. M.

AU - Gorokhov, I. M.

AU - Ivanovskaya, T. A.

AU - Konstantinova, G. V.

PY - 2019/9/1

Y1 - 2019/9/1

N2 - Abstract—: This work presents the results of the mineralogical, crystallochemical, and geochronological study of globular phyllosilicates (GPS) of glauconite–illite series from the Bakeevo Formation. This formation is the basal member of the Vendian Asha Group in the Southern Urals. The monomineral GPS fractions representing the globules varying in size and density are composed of Al-glauconite and illite. The Rb–Sr dating of the GPS of the Bakeevo Formation in combination with the modeling of cation distribution in their structure and comparison of the model data with Mössbauer and IR spectroscopy data was performed for the first time. The Rb–Sr age of the Bakeevo glauconite is 642 ± 9 Ma. The mineralogical and geochemical characteristics in combination with model calculations show that the stratigraphic significance of this age is quite reasonable. The initial 87Sr/86Sr ratio in the glauconitization environment is 0.7080 ± 0.0009 and is consistent within the experimental error with this ratio in the Vendian seawater. Thus, the lower boundary of the Vendian in the Southern Urals has an age of about 640 Ma.

AB - Abstract—: This work presents the results of the mineralogical, crystallochemical, and geochronological study of globular phyllosilicates (GPS) of glauconite–illite series from the Bakeevo Formation. This formation is the basal member of the Vendian Asha Group in the Southern Urals. The monomineral GPS fractions representing the globules varying in size and density are composed of Al-glauconite and illite. The Rb–Sr dating of the GPS of the Bakeevo Formation in combination with the modeling of cation distribution in their structure and comparison of the model data with Mössbauer and IR spectroscopy data was performed for the first time. The Rb–Sr age of the Bakeevo glauconite is 642 ± 9 Ma. The mineralogical and geochemical characteristics in combination with model calculations show that the stratigraphic significance of this age is quite reasonable. The initial 87Sr/86Sr ratio in the glauconitization environment is 0.7080 ± 0.0009 and is consistent within the experimental error with this ratio in the Vendian seawater. Thus, the lower boundary of the Vendian in the Southern Urals has an age of about 640 Ma.

KW - globular phyllosilicates

KW - IR spectroscopy

KW - Mössbauer spectroscopy

KW - Rb–Sr age

KW - Southern Urals

KW - Vendian

UR - http://www.scopus.com/inward/record.url?scp=85073259236&partnerID=8YFLogxK

U2 - 10.1134/S0869593819050083

DO - 10.1134/S0869593819050083

M3 - Article

AN - SCOPUS:85073259236

VL - 27

SP - 573

EP - 587

JO - Stratigraphy and Geological Correlation

JF - Stratigraphy and Geological Correlation

SN - 0869-5938

IS - 5

ER -

ID: 75950639