The first age data of the deposits of Kondomsky iron ore field (Gornaya Shoriya): results of U-Pb (ID-TIMS) dating of garnet

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Abstract

The results of U-Pb (ID-TIMS) geochronological studies of garnet from iron ore skarns of the Shalym deposit (Kondomskoye ore field, Gornaya Shoriya) are presented. The data obtained are the first estimate of the age of formation of the iron ore mineralization of the Kondomsky field (499 ± 1 MA). The formation of this deposit is associated with the stage of subalkaline magmatism of the Middle-Upper Cambrian age, which was not previously identified within the folded structures of the Mountain Shoria (the western part of the Altai-Sayan folded region).

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About the authors

M. V. Stifeeva

Institute of Precambrian Geology and Geochronology Russian Academy of Sciences

Author for correspondence.
Email: stifeeva.maria@yandex.ru
Russian Federation, Saint-Petersburg

E. B. Salnikova

Institute of Precambrian Geology and Geochronology Russian Academy of Sciences

Email: stifeeva.maria@yandex.ru
Russian Federation, Saint-Petersburg

A. B. Kotov

Institute of Precambrian Geology and Geochronology Russian Academy of Sciences

Email: stifeeva.maria@yandex.ru

Corresponding Member of the RAS

Russian Federation, Saint-Petersburg

Yu. D. Gritsenko

Lomonosov Moscow State University; A. Fersman Mineralogical Museum

Email: stifeeva.maria@yandex.ru

Geological Department

Russian Federation, Moscow; Moscow

References

  1. Вахрушев В. А. Вопросы минералогии, геохимии и генезиса железных руд Кондомского района Горной Шории // Отв. ред. Г. Л. Поспелов. Акад. наук СССР. Сиб. отд-ние. Ин-т геологии и геофизики. Новосибирск: Изд-во Сиб. отд-ния АН СССР. 1959. 190 с.
  2. Бабин Г. А. Магматизм Горной Шории (состав, районирование, геодинамическая интерпретация): Дисс. на соискание учен. степени канд. геол.-мин. наук. Новосибирск. 2003. 20 с.
  3. Кашкай М. А. К минералогии рудных процессов Кондомской группы железорудных месторождений / Сборник статей под ред. П. И. Лебедев. Ч. 1. АН СССР. Ленинград: Изд-во Акад. Наук СССР. 1934. 208 с.
  4. Стифеева М. В., Сальникова Е. Б., Самсонов А. В., Котов А. Б., Гриценко Ю. Д. U-Pb возраст граната из скарнов Дашкесанского месторождения (Малый Кавказ) // ДАН. 2019. Т. 487. № 5. С. 554–557.
  5. Стифеева М. В., Сальникова Е. Б., Котов А. Б., Гриценко Ю. Д., Пейчева И. Возраст рудоносных метасоматитов центральной части Алданского щита: результаты U-Pb (ID-TIMS) геохронологических исследований граната // Докл. РАН. Науки о Земле. 2023. Т. 510. № 1. С. 25–29.
  6. Ludwig K. R. PbDat for MS-DOS, version 1.21 U. S. Geological Survey Open-File Report 88–542. 1991. 35 p.
  7. Ludwig K. R. Isoplot 3.70. A Geochronological Toolkit for Microsoft Excel // Berkeley Geochronology Center Special Publications. 2003. V. 4. 70 p.
  8. Steiger R. H., Jäger E. Subcommission on geochronolo- gy: 865 convention of the use of decay constants in geo- and cosmochronology // Earth and Planetary Science Letters. 1977. V. 36. P. 359–362.
  9. Stacey J. S., Kramers J. D. Approximation of terrestrial lead isotope evolution by a two-stage model // Earth and Planetary Science Letters. 1975. V. 26. P. 207–221.
  10. Врублевский В. В., Котельников А. Д., Изох А. Э. Возраст, петрологические и геохимические условия формирования Когтахского габбро-монцонитового комплекса Кузнецкого Алатау // Геология и геофизика. 2018. Т. 59. № 7. С. 900–930.

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2. Fig. 1. Schematic map of volcanic belts and paleobasins of the western part of the Altai-Sayan folded region (compiled according to [2]); (b): 1 – volcanic belts with marginal sea and (or) oceanic associations; 2 – volcanic belts with island-arc associations; 3 – Vendian-Cambrian paleobasins; 4 – Early Paleozoic granitoid batholiths; 5 – Mesozoic-Cenozoic deposits; 6 – study area.

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3. Fig. 2. Image of the EDS map showing the distribution of Mg, Fe, Al and Ca in garnet from the Shalym deposit skarns.

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4. Fig. 3. Concordia diagram for garnet from ore-bearing skarns of the Shalym deposit. The numbers of points on the diagram correspond to the ordinal numbers in Table 1.

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