Advertisement

Doklady Earth Sciences

, Volume 481, Issue 1, pp 948–952 | Cite as

Crustal Contamination of Early Cretaceous Magmatic Rocks of the Western Transbaikal Rifting Zone

  • T. Yu. Komaritsyna
  • V. V. Yarmolyuk
  • A. A. Vorontsov
Geochemistry

Abstract

Results of isotope Sr, Ns, and O analyses of volcanic rocks from the Uda sector of the West Transbaikal Rift Zone have allowed estimation of the character of interaction of their parental mantle melts with crustal rocks. The smallest magnitude of this interaction has been found in the compositions of Late Cretaceous (83–70 Ma) volcanics, the geochemical and isotope markers of which suggest their derivation from a moderately enriched mantle compositionally resembling OIB sources. The Early Cretaceous volcanics were derived from mantle sources that included a mantle enriched by subduction. While ascending through the crust, the parental melts of the Uda Complex (130–111 Ma) were contaminated by the lower crust matter. The Zazin Complex magmas (143–135 Ma) have features suggesting their interaction with upper crustal granitoids of the Angara–Vitim Batholith.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    V. V. Yarmolyuk and V. G. Ivanov, Geotectonics 34 (2), 121–140 (2000).Google Scholar
  2. 2.
    V. V. Yarmolyuk, V. G. Ivanov, and V. I. Kovalenko, Petrology 6 (2), 101–123 (1998).CrossRefGoogle Scholar
  3. 3.
    A. A. Vorontsov, V. V. Yarmolyuk, and T. Yu. Komaritsyna, Russ. Geol. Geophys. 57 (5), 723–744 (2016).CrossRefGoogle Scholar
  4. 4.
    State Geological Map of the Russian Federation 1: 1000000, Sheets No. N-49 (Karpinsky Russ. Geol. Res. Inst., St. Petersburg, 2011).Google Scholar
  5. 5.
    A. Zindler and S. Hart, Annu. Rev. Earth Planet. Sci. 14, 493–571 (1986).CrossRefGoogle Scholar
  6. 6.
    A. A. Tsygankov, Russ. Geol. Geophys. 55 (2), 153–176 (2014).CrossRefGoogle Scholar
  7. 7.
    V. V. Yarmolyuk and V. I. Kovalenko, Geol. Geofiz. 44 (12), 1260–1274 (2003).Google Scholar

Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • T. Yu. Komaritsyna
    • 1
  • V. V. Yarmolyuk
    • 2
  • A. A. Vorontsov
    • 1
  1. 1.Vinogradov Institute of Geochemistry, Siberian BranchRussian Academy of SciencesIrkutskRussia
  2. 2.Institute of Geology of Ore Deposits, Petrography, and GeochemistryRussian Academy of SciencesMoscowRussia

Personalised recommendations