Petrology

, Volume 18, Issue 3, pp 278–307 | Cite as

Sources and geodynamics of the Late Cenozoic volcanism of Central Mongolia: Evidence from isotope-geochemical studies

  • V. M. Savatenkov
  • V. V. Yarmolyuk
  • E. A. Kudryashova
  • A. M. Kozlovskii
Article

Abstract

In the Late Cenozoic, the volcanism of the South Khangai Volcanic Region (SKhVR) spanned the Khangai Range and its framing. Geochronological, petrochemical, geochemical, and isotope studies were performed for volcanic rocks of this region, which are represented by high-K basic and intermediate rocks of OIB affinity. Initial Sr, Nd, and Pb isotope ratios in the volcanic rocks of the SKhVR are close to those of the volcanic rocks of Pitcairn Island and form trends between PREMA, EMI, and EMII sources.

The petrochemical, geochemical, and isotope zoning is unraveled in distribution of the Late Cenozoic associations within SKhVR. Volcanic sequences of the Vodorazdel’nyi graben occupying the watershed part of the Khangai Range and adjacent valley lava flows are located in the central part of the area. The peripheral part is made up of the volcanic associations formed within the Lake Valley and Taryat grabens and the Orkhon-Selenga area. Compositional zoning is characterized by an increase in contents of alkalis, Ti, P, and some other lithophile elements, as well as systematic changes of isotope composition of the rocks from central part toward periphery.

Taking into account gravimetric and seismotomographic data marking asthenospheric rise beneath Central Khangai, it was concluded that the studied volcanism is related to mantle plume activity. Revealed compositional zoning of the volcanic region presumably reflects the plume heterogeneity. The volcanism of the watershed part of the Khangai Range was controlled by plume channel, which was presumably fed by PREMA-type lower mantle. The isotopic enrichment of lavas in the peripheral parts of the volcanic region was not related to participation of lithospheric components, but reflects the distribution of compositionally different mantle sources in plume structure. The most probable source of enriched components in the Late Cenozoic rocks of SKhVR was Early Precambrian recycled crustal material, which was isolated from upper mantle convection after subduction and transported by the ascending mantle jet to the lithosphere base only in the Late Cenozoic.

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References

  1. 1.
    M. J. Le Bas and R. W. Le Maitre, A. Streckeisen, and B. Zanettin, “A Chemical Classification of Volcanic Rocks Based on the Total Alkali-Silica Diagram,” J. Petrol. 27, 745–750 (1986).Google Scholar
  2. 2.
    V. P. Afonin, N. I. Komyak, V. P. Nikolaev, and R. I. Plotnikov, X-Ray Fluorescence Analysis (Nauka, Novosibirsk, 1991) [in Russian].Google Scholar
  3. 3.
    T. L. Barry, A. V. Ivanov, S. V. Rasskazov, et al., “Helium Isotopes Provide no Evidence for Deep Mantle Involvement in Widespread Cenozoic Volcanism across Central Asia,” Lithos 95, 415–424 (2007).CrossRefGoogle Scholar
  4. 4.
    T. L. Barry, A. D. Saunders, P. D. Kempton, et al., “Petrogenesis of Cenozoic Basalts from Mongolia: Evidence for the Role of Asthenospheric versus Metasomatized Lithospheric Mantle Sources,” J. Petrol 44(1), 55–91 (2003).CrossRefGoogle Scholar
  5. 5.
    R. Bolhar, B. S. Kamber, and K. D. Collerson, “U-Th-Pb Fractionation in Archaean Lower Continental Crust: Implications for Terrestrial Pb Isotope Systematics,” Earth Planet. Sci. Lett. 254, 127–145 (2007).CrossRefGoogle Scholar
  6. 6.
    E. I. Demonterova, A. V. Ivanov, S. V. Rasskazov, et al., “Lithospheric Control on Late Cenozoic Magmatism at the Boundary of the Tuva-Mongolian Massif, Khubsugul Area, Northern Mongolia,” Petrologiya 15(1), 93–110 (2007) [Petrology 15, 90–107 (2007)].Google Scholar
  7. 7.
    E. V. Devyatkin, Cenozoic of Inner Asia: Stratigraphy, Geochronology, and Correlation (Nauka, Moscow, 1981) [in Russian].Google Scholar
  8. 8.
    J. Eisele, M. Sharma, S. J. G. Galer, et al., “The Role of Sediment Recycling in EM-1 Inferred from Os, Pb, Hf, Nd, Sr Isotope and Trace Element Systematics of the Pitcairn Hotspot,” Earth Planet. Sci. Lett. 196, 197–212 (2002).CrossRefGoogle Scholar
  9. 9.
    G. Faure, Principles of Isotope Geology (Wiley, New York, 1986; Mir, Moscow, 1989) [in Russian].Google Scholar
  10. 10.
    V. A. Glebovitskii, L. P. Nikitina, A. K. Saltykova, et al., “Thermal and Chemical Heterogeneity of the Upper Mantle beneath the Baikal-Mongolia Territory,” Petrologiya 15(1), 61–92 (2007) [Petrology 15, 58–89 (2007)].Google Scholar
  11. 11.
    A. W. Hofmann, “Mantle Geochemistry: the Message from Oceanic Volcanism,” Nature 385, 219–229 (1997).CrossRefGoogle Scholar
  12. 12.
    A. W. Hofmann, “Sampling Mantle Heterogeneity through oceanic basalts: isotopes and trace elements,” in Treatise on Geochemistry, Ed. by R. W. Carlson, H. D. Holland, and K. K. Turekian (Elsevier, London, 2003), Vol. 2, pp. 61–101.Google Scholar
  13. 13.
    D. A. Ionov, I. Ashchepkov, and E. Jagoutz, “The Provenance of Fertile Off-Craton Lithospheric Mantle: Sr-Nd Isotope and Chemical Composition of Garnet and Spinel Peridotite Xenoliths from Vitim, Siberia,” Chem. Geol. 217, 41–75 (2005).CrossRefGoogle Scholar
  14. 14.
    Classification of Magmatic (Igneous) Rocks and Glossary of Terms (Nedra, Moscow, 1997), p. 248 [in Russian].Google Scholar
  15. 15.
    T. Kogiso, M. M. Hirschmann, D. J. Frost, “High-Pressure Partial Melting of Garnet Pyroxenite: Possible Mafic Lithologies in the Source of Ocean Island Basalts,” Earth Planet. Sci. Lett. 216, 603–617 (2003).CrossRefGoogle Scholar
  16. 16.
    D. V. Kovalenko, “Features of Spatial Distribution of Cenozoic Magmatism in the Central-Asian Within-Plate Volcanic Province: Relation with Kinematics of Eurasia,” Dokl. Akad. Nauk, 428(2), 215–219 (2009).Google Scholar
  17. 17.
    V. I. Kovalenko, V. V. Yarmolyuk, D. A. Ionov, et al., “Mantle Evolution of Central Asia and Development of Tectonic Structures of the Earth’s Crust,” Geotektonika, No. 4, 3–16 (1990).Google Scholar
  18. 18.
    V. I. Kovalenko, V. V. Yarmolyuk, E. B. Sal’nikova, et al., “Sources of Igneous Rocks and Genesis of the Early Mesozoic Tectonomagmatic Area of the Mongolia-Transbaikalia Magmatic Region: 2. Petrology and Geochemistry,” Petrologiya 11(3), 227–254 (2003) [Petrology 11, 205–229 (2003)].Google Scholar
  19. 19.
    D. V. Kovalenko, V. V. Yarmolyuk, and A. V. Solov’ev, “Migration of Volcanic Centers of the South Khangai Hot Spot: Paleomagnetic Evidence,” Geotektonika, No. 3, 66–73 (1997) [Geotectonics 31, 228–235 (1997)].Google Scholar
  20. 20.
    E. A. Kudryashova, V. A. Lebedev, and V. V. Yarmolyuk, “New Geochronological (K-Ar) Data on the Age and Stages of Volcanism in the Late Cenozoic Orkhon-Selenga Volcanic Area, Mongolia,” in Proceedings of 4th Russian Conference on Isotope Geochronology, St. Petersburg, Russia, 2009 (St. Petersburg, 2009), Vol. 1, pp. 294–296.Google Scholar
  21. 21.
    E. A. Kudryashova, V. V. Yarmolyuk, V. A. Lebedev, and V. M. Savatenkov, “Geochronology and Regularity in Migration of Volcanism within the Khangai Late Cenozoic Volcanic Area,” in Proceedings of 3rd Russian Conference on Isotope Dating of Ore Formation, Magmatism, Sedimentation, and Metamorphism (IGEM RAN, Moscow, 2006), Vol. 1, pp. 355–362 [in Russian].Google Scholar
  22. 22.
    S. Maruyama, “Plume Tectonics,” J. Geol. Soc. Japan 100(1) 24–49 (1994).Google Scholar
  23. 23.
    N. N. Mel’nikov, “Errors of the Double Spiking Technique in the Isotopic Analysis of Common Lead,” Geokhimiya, No. 12, 1333–1339 (2005) [Geochem. Int. 43, 1228–1234 (2005)].Google Scholar
  24. 24.
    V. V. Mordvinova, A. Desham, T. Dugarmaa, et al., “Study of Velocity Structure of the Lithosphere Across Mongolia-Okhotsk Transect 2003 based on Exchange SV Waves,” Fiz. Zemli, No. 2, 21–32 (2007).Google Scholar
  25. 25.
    V. V. Mordvinova, A. V. Treusov, E. V. Sharova, and V. I. Grebenshchikova, “Results of Teleseismic Two-Dimensional R-Tomography: Evidence for Mantle Plume beneath Khangai,” in Proceedings of Scientific Conference on Program of Basic Researchs on Geodynamic Evolution of the Lithosphere of the Central-Asian Mobile Belt: from Ocean to Continent, Irkutsk, Russia,2008 (IZK SO RAN, Irkutsk, 2008) [in Russian].Google Scholar
  26. 26.
    S. V. Panteeva, D. P. Gladkochoub, T. V. Donskaya, et al., “Determination of 24 Trace Elements in Felsic Rocks by Inductively Coupled Plasma Mass Spectrometry after Lithium Metaborate Fusion,” Spectrochimica Acta Part B: Atomic Spectroscopy, 58, 341–350 (2003).CrossRefGoogle Scholar
  27. 27.
    V. M. Savatenkov, I. M. Morozova, and L. K. Levskii, “Behavior of the Sm-Nd, Rb-Sr, K-Ar, and U-Pb Isotopic Systems during Alkaline Metasomatism: Fenites in the Outer-Contact Zone of an Ultramafic-Alkaline Intrusion,” Geokhimiya, No. 10, 1027–1049 (2004) [Geochem. Int. 42, 899–920 (2004)].Google Scholar
  28. 28.
    A. Stracke, M. Bizimis, and V. J. M. Salters, “Recycling Oceanic Crust: Quantitative Constraints,” Geochem. Geophys. Geosys. 4(3), (2003a). doi:10.1029/2001GC000223.Google Scholar
  29. 29.
    A. Stracke, A. Zindler, V. J. M. Salters, et al., “Theistareykir Revisited,” Geochem. Geophys. Geosys. 4(2), (2003b). doi:10.1029/2001GC000201.Google Scholar
  30. 30.
    S. S. Sun and W. F. MsDonough, “Chemical and Isotopic Systematics of Oceanic Basalts: Implications for Mantle Composition and Processes,” in Magmatism in the Ocean Basins, Ed. by A. D. Saunders and M. J. Norry Geol. Soc. London Spec. Publ. 42, 313–345 (1989).Google Scholar
  31. 31.
    S. R. Taylor and S. M. McLennan, The Continental Crust: Its Composition and Evolution (Blackwell, Oxford, 1985; Mir, Moscow, 1988).Google Scholar
  32. 32.
    M. Wilson, Igneous Petrogenesis. A Global Approach (Unwin Hyman, London, 1989).CrossRefGoogle Scholar
  33. 33.
    V. V. Yarmolyuk, E. A. Kudryashova, A. M. Kozlovskii, et al., “Late Cenozoic Volcanism at the Northeastern Flank of the South Khangai Volcanic Region (Central Mongolia): Geochronology and Formation Conditions,” Dokl. Akad. Nauk 417(4), 516–521 (2007a) [Dokl. Earth. Sci. 417, 1320–1324 (2007a)].Google Scholar
  34. 34.
    V. V. Yarmolyuk, E. A. Kudryashova, A. M. Kozlovskii, and V. A. Lebedev, “Late Cenozoic Volcanism of Khangai (Central Mongolia): Evidence for Recent Orogeny in Central Asia,” Dokl. Akad. Nauk 422(2), 223–228 (2008) [Dokl. Earth Sci. 422, 1032–1036 (2008)].Google Scholar
  35. 35.
    V. V. Yarmolyuk, E. A. Kudryashova, A. M. Kozlovskii, and V. M. Savatenkov, “Late Cretaceous-Early Cenozoic Volcanism of South Mongolia as a Trace of South Khangai Mantle Hot Spot,” Vulkanol. Seismol., No. 1, 3–31 (2007b).Google Scholar
  36. 36.
    V. V. Yarmolyuk, V. G. Ivanov, V. I. Kovalenko, and B. G. Pokrovskii, “Magmatism and Geodynamics of the Southern Baikal Volcanic Region (Mantle Hot Spot): Results of Geochronological, Geochemical, and Isotopic (Sr, Nd, and O) Investigations,” Petrologiya 11(1), 3–34 (2003) [Petrology 11, 1–30 (2003)].Google Scholar
  37. 37.
    V. V. Yarmolyuk, V. G. Ivanov, V. I. Kovalenko, and V. S. Samoilov, “Dynamics of the Formation and Magmatism of the Late Mesozoic-Cenozoic South Khangai Mantle Hot Spot (Mongolia),” Geotektonika, No. 5, 28–45 (1994).Google Scholar
  38. 38.
    V. V. Yarmolyuk, V. G. Ivanov, and V. I. Kovalenko, “Sources of Intraplate Magmatism of Western Transbaikalia in the Late Mesozoic-Cenozoic:Trace-Element and Isotope Data,” Petrologiya 6(2), 115–138 (1998) [Petrology 6, 101–123 (1998)].Google Scholar
  39. 39.
    V. V. Yarmolyuk, V. I. Kovalenko, V. G. Ivanov, and D. Z. Zhuravlev, “Sr and Nd Isotope Composition of the Basic Volcanics of the South Khangai Hot Spot of Central Asia,” Dokl. Akad. Nauk 342(2), 230–234 (1995b).Google Scholar
  40. 40.
    V. V. Yarmolyuk, V. I. Kovalenko, and V. G. Ivanov, “Within-Plate Late Mesozoic-Cenozoic Province of Central-East AsiaL Projection of Mantle Hot Field,” Geotektonika, No. 5, 41–67 (1995a).Google Scholar
  41. 41.
    R. E. Zartman and S. M. Haines, “The Plumbotectonic Model for Pb Isotopic Systematics among Major Terrestrial Reservoirs-A Case for Bi-directional Transport,” Geochim. Coscochim. Acta 52, 1327–1339 (1988).CrossRefGoogle Scholar
  42. 42.
    A. Zindler and S. Hart, “Chemical Geodynamics,” Ann. Rev. Earth Planet. Sci. 14, 493–571 (1986).CrossRefGoogle Scholar
  43. 43.
    Yu. A. Zorin and E. Kh. Turutanov, “Plumes and Geodynamics of the Baikal Rift Zone,” Geol. Geofiz. 46(7), 685–699 (2005).Google Scholar
  44. 44.
    Yu. A. Zorin and E. Kh. Turutanov, “Regional Isostatic Gravity Anomalies and Mantle Plumes in the Southern Part of the East Siberia (Russia) and in Central Mongolia,” Geol. Geofiz. 45(10), 1248–1258 (2004).Google Scholar
  45. 45.
    Yu. A. Zorin, E. Kh. Turutanov, V. M. Kozhevnikov, et al., “Cenozoic Upper Mantle Plumes in East Siberia and Central Mongolia and Subduction of the Pacific Plate,” Dokl. Akad. Nauk 409(2), 217–221 (2006a) [Dokl. Earth Sci. 409, 723–726 (2006a)].Google Scholar
  46. 46.
    Yu. A. Zorin, E. Kh. Turutanov, V. M. Kozhevnikov, et al., “On Nature of the Cenozoic Upper Mantle Plumes in East Siberian (Russia) and Central Mongolia,” Geol. Geofiz. 47(10), 1060–1074 (2006b).Google Scholar
  47. 47.
    Yu. A. Zorin, T. V. Balk, M. R. Novoselova, and E. Kh. Turutanov, “Thickness of Lithosphere Beneath the Mongolia-Siberian Mountainous Territory and Adjacent Regions,” Fiz. Zemli, No. 7, 33–42 (1988).Google Scholar

Copyright information

© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  • V. M. Savatenkov
    • 1
  • V. V. Yarmolyuk
    • 2
  • E. A. Kudryashova
    • 2
  • A. M. Kozlovskii
    • 2
  1. 1.Institute of Precambrian Geology and GeochronologyRussian Academy of SciencesSt. PetersburgRussia
  2. 2.Institute of Geology of Ore Deposits, Petrography, Mineralogy, and GeochemistryRussian Academy of SciencesMoscowRussia

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