Advertisement

Russian Journal of Pacific Geology

, Volume 3, Issue 1, pp 80–90 | Cite as

Geochemistry and genesis of ultrapotassic and potassic magmatic rocks on the eastern shore of Chaun Bay in Chukotka and their role in the metallogenic specialization of tin-bearing granitoids

  • S. V. Efremov
Article
  • 65 Downloads

Abstract

Basite magmatism preceding the intrusion of large volumes of felsic magmas takes place only during powerful tectonic rearrangements, which span both the continental crust and lithospheric mantle. The study of this magmatism makes it possible to solve many genetic problems and obtain important geological information on the sources and processes that are responsible for granitoid magmatism. This paper reports the results of the geochemical study of potassic and ultrapotassic magmatic rocks that predate the intrusion of the granitoid complex and belong to it.

In terms of geochemistry, the studied magmatic rocks of Chukotka correspond to the derivatives of potassic and ultrapotassic magmas, which allows us to use the models of formation of ultrapotassic magmas for interpreting the genetic features of tin-bearing granites, in particular, for explaining the anomalous contents of incompatible elements in these rocks. Using modern genetic models in combination with geological, geophysical, and geochemical data, it is established that the source of this specialization was the lithospheric mantle domain. The domain was formed within a convergent geologic boundary owing to the metasomatic reworking of the mantle wedge by fluids that were released during dehydration of the oceanic lithosphere. Based on the obtained results, a new model was proposed for the formation of tin-bearing granitoids in the collisional orogens. This model is underlain by the concept of a particular lithospheric source, which acquired its geochemical and metallogenic signatures during intense tectonic transformation that involved the lithospheric mantle. These signatures were inherited by magmas formed during melting within this domain.

Key words

tin-bearing granitoids metasomatized mantle ultrapotassic basic rocks Chukotka 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Yu. Ya. Vashchilov, T. P. Zimnikova, and N. A. Shilo, Petrophysics of the Deep-Seated and Surface Rocks in the Northeastern Asia (Nauka, Moscow, 1982) [in Russian].Google Scholar
  2. 2.
    D. V. Dudkinsky, S. V. Efremov, and V. D. Kozlov, “Geochemistry of Mesozoic Granitoids of Increased Basicity on the Eastern Shore of the Chaun Bay (Chukotka),” Tikhookean. Geol., No. 6, 74–84 (1993).Google Scholar
  3. 3.
    D. V. Dudkinsky, V. D. Kozlov, and S. V. Efremov, “Petrology, Geochemistry, and Geodynamic Setting of the Formation of Ore-Bearing Granitoids, Chukotka,” Geol. Geofiz. 38(7), 1202–1215 (1997).Google Scholar
  4. 4.
    S. V. Efremov, D. V. Dudkinsky, and V. D. Kozlov, “Genesis of Rare Metal Plumasite Granites in Western Chukotka: New Data,” Dokl. Earth Sci. 359, 1022 (1996) [Dokl. Akad. Nauk 349 (5), 664–665 (1996)].Google Scholar
  5. 5.
    S. V. Efremov, V. D. Kozlov, and G. P. Sandimirova, “The Rb/Sr Age of Granitoids of the Central Chukot Region: A New View on the Geological Evolution of the Region,” Dokl. Akad. Nauk 375(6), 816–819 (2000) [Dokl. Earth Sci. 375A (9), 1463–1466 (2000)].Google Scholar
  6. 6.
    Classification of Magmatic (Igneous) Rocks and Gloassary of Terms. Recommendations of Subcommittee on Systematization of Igneous Rocks of the International Union of Geological Sciences (Nedra, Moscow, 1997), p. 245 [in Russian].Google Scholar
  7. 7.
    K. G. Cox, D. D. Bell, and R. D. Pankhurst, The Interpretation of Igneous Rocks (Allen-Unwin, London, 1979; Nedra, Moscow, 1982) [in Russian].Google Scholar
  8. 8.
    I. N. Kotlyar and T. B. Rusakova, “Geological-Geochronological Model of Cretaceous Continental Sequences of the Okhotsk-Chukot Magmatic Province, Russian Northeast,” Tekhookean. Geologiya 24(1), 25–44 (2005).Google Scholar
  9. 9.
    Yu. S. Malyshev, Deep Modeling of Geological Structures from Gravity and Magnetic Data (Vladivostok, 1985) [in Russian].Google Scholar
  10. 10.
    A. P. Milov, Late Mesozoic Granitoid Complexes of Central Chukotka (Nauka, Moscow, 1975) [in Russian].Google Scholar
  11. 11.
    E. L. Reinlib and N. P. Romanovsky, “Studies of Domal Ore-Bearing Magmatic Structures Based on Geophysical Data,” in Geology of the Far East (Vladivostok, 1975), pp. 110–115 [in Russian].Google Scholar
  12. 12.
    N. P. Romanovsky, Petrophysics of Granitoid Ore Magmatic Systems of the Pacific Belt (Nauka, Moscow, 1987) [in Russian].Google Scholar
  13. 13.
    N. M. Samorukov and V. T. Matveenko, Explanatory Note to the Geological Map. Scale 1:2000000 (Sheet R59-XXIII, XXIV) (Magadan, 1984) [in Russian].Google Scholar
  14. 14.
    S. R. Taylor and S. M. McLennan, Continental Crust: Its Composition and Evolution (Blackwell, Oxford, 1985; Mir, Moscow, 1988).Google Scholar
  15. 15.
    I. V. Tibilov, S. F. Begunov, Ya. S. Larionov, and A. Ya. P’yankov, “Triassic Stratigraphy of the Chukot Structural Facial Area,” in Geology and Mineral Resources of the Northeastern USSR (Magadan, 1982), No. 26, pp. 15–22 [in Russian].Google Scholar
  16. 16.
    R. B. Umitbaev, Okhotsk-Chaun Metallogenic Province (Nauka, Moscow, 1986) [in Russian].Google Scholar
  17. 17.
    H. Becker, T. Wenzel, and F. Volker, “Geochemistry of Glimmerite Veins in Peridotites from Lower Austria: Implications for the Origin of K-Rich Magmas in Collision Zones,” J. Petrol. 40(2), 315–338 (1999).CrossRefGoogle Scholar
  18. 18.
    K. Bell, F. Castorina, G. Rosatelli, and F. Stoppa, “Large Scale, Mantle Plume Activity below Italy: Isotopic Evidence and Volcanic Consequences,” in Proceedings of European Geosciences Union, General Assembly 2003, Nice, France, 2003 (Europ. Geophys. Soc., 2003), CD.Google Scholar
  19. 19.
    R. Benito, J. Lypez-Ruiz, J. M. Cebrib, et al., “Sr and O Isotope Constraints on Source and Crustal Contamination in the High-K Calc-Alkaline and Shoshonitic Neogene Volcanic Rocks of SE Spain,” Lithos 46, 773–802 (1999).CrossRefGoogle Scholar
  20. 20.
    J. M. Brenan, H. F. Shaw, and F. J. RErson, “Experimental Evidence for the Origin of Lead Enrichment in Convergent Margin Magmas,” Nature 378, 54–56 (1995).CrossRefGoogle Scholar
  21. 21.
    W. K. Conrad, J. A. Nicholls, and V. J. Wall, “Water-Saturated and Undersaturated Melting of Metaaluminous and Peraluminous Crustal Compositions at 10 Kbar: Evidence for the Origin of Silicis Magmas in the Taupo Volcanic Zone, New Zealand, and Other Occurences,” J. Petrol. 29(4), 765–804 (1988).Google Scholar
  22. 22.
    S. Conticelli and A. Peccerillo, “Petrology and Geochemistry of Potassic and Ultrapotassic Volcanism in Central Italy: Petrogenesis and Inferences on the Evolution of the Mantle Sources,” Lithos 28, 221–240 (1992).CrossRefGoogle Scholar
  23. 23.
    S. Conticelli, M. D’Antonio, L. Pinarelli, and L. Civetta, “Source Contamination and Mantle Heterogeneity in the Genesis of Italian Potassic and Ultrapotassic Volcanic Rocks: Sr-Nd-Pb Isotope Data from Roman Province and Southern Tuscany,” Mineral. Petrol. 74, 189–222 (2002).CrossRefGoogle Scholar
  24. 24.
    S. Foley, D. Green, and L. Toscani, “The Ultrapotassic Rocks: Characteristics, Classification, and Constraints for Petrogenetic Models,” Earth Sci. Rev. 24, 81–134 (1987).CrossRefGoogle Scholar
  25. 25.
    S. F. Foley, “Vein-Plus-Wall-Rock Melting Mechanisms in the Lithosphere and the Origin of Potassic Alkaline Magmas,” Lithos 28, 435–453 (1992).CrossRefGoogle Scholar
  26. 26.
    H. J. Forster, G. Tischendorf, R. B. Trumbull, and B. Gottesmann, “Late-Collisional Granites in the Variscan Erzgebirge, Germany,” J. Petrol. 40(11), 1613–1645 (1999).CrossRefGoogle Scholar
  27. 27.
    D. Gasperini, J. Blichert-Toft, D. Bosch, et al., “Upwelling of Deep Mantle Material through a Plate Window: Evidence from the Geochemistry of Italian Basaltic Volcanics,” J. Geophys. Res. 107, 23–67 (2002).CrossRefGoogle Scholar
  28. 28.
    A. Le Roex, D. R. Bell, and P. Davis, “Petrogenesis of Group I Kimberlites from Kimberley, South Africa: Evidence from Bulk-Rock Geochemistry,” J. Petrol. 44, 2261–2286 (2003).CrossRefGoogle Scholar
  29. 29.
    C. Miller, R. Schuster, U. Klotzli, and W. Frank, “Post- Collisional Potassic and Ultrapotassic Magmatism in SW Tibet: Geochemical and Sr-Nb-Pb-O Isotopic Constraints for Mantle Source Characteristics and Petrogenesis,” J. Petrol. 40(9), 1399–1424 (1999).CrossRefGoogle Scholar
  30. 30.
    D. T. Murphy, K. D. Collerson, and B. S. Kamber, “Lamproites from Gaussberg, Antarctica: Possible Transition Zone Melts of Archaean Subducted Sediments,” J. Petrol. 43, 981–1001 (2002).CrossRefGoogle Scholar
  31. 31.
    D. R. Nelson, M. T. McCulloch, and S. S. Sun, “The Origins of Ultrapotassic Rocks as Inferred from Sr, Nd and Pb Isotopes,” Geochim. Cosmochim. Acta 50, 231–245 (1986).CrossRefGoogle Scholar
  32. 32.
    W. J. Nokleberg, M. L. Parfenov, J. W. H. Monger, et al., “Phanerozoic Tectonic Evolution of the Circum-North Pacific,” USGS Open Rept, Professional Paper, 1626 / http://geopubs.wr.usgs.gov/prof-paper/pp1626.
  33. 33.
    A. Pecerillo and R. Taylor, “Geochemistry of Eocene Calc-Alkaline Volcanic Rocks from the Alban Hills (Roman Comagmatic Region) as Inferred from Trace Element Geochemistry,” Contrib. Mineral. Petrol. 58, 63–81 (1976).CrossRefGoogle Scholar
  34. 34.
    A. Peccerillo, “Multiple Mantle Metasomatism in Central- Southern Italy: Geochemical Effects, Timing and Geodynamic Implications,” Geology 27, 315–318 (1999).CrossRefGoogle Scholar
  35. 35.
    T. Plank, “Constraints from Thorium/Tanthanum on Sediment Recycling at Subduction Zones and the Evolution of the Continents,” J. Petrology 46, 921–944 (2005).CrossRefGoogle Scholar
  36. 36.
    D. Prelevic, S. F. Foley, V. Cvetkov, and R. L. Romer, “Origin of Minette by Mixing of Lamproite and Dacite Magmas in Veliki Majdan, Serbia,” J. Petrol. 45, 759–792 (2004).CrossRefGoogle Scholar
  37. 37.
    N. W. Rogers, C. J. Hawkesworth, R. J. Parker, and J. S. Marsh, “The Geochemistry of Potassic Lavas from Vulsini, Central Italy, and Implications for Mantle Enrichment Processes beneath the Roman Region,” Contrib. Mineral. Petrol. 90, 244–257 (1985).CrossRefGoogle Scholar
  38. 38.
    B. Schurr, G. Ascha, A. Rietbrock, et al., “Complex Patterns of Fluid and Melt Transport in the Central Andean Subduction Zone Revealed by Attenuation Tomography,” Earth Planet. Sci. Lett. 215, 105–119 (2003).CrossRefGoogle Scholar
  39. 39.
    Supplemental Data for Core, Ed. by W. McDonough http:/earthref.org.GERM.core.htm
  40. 40.
    R. Vollmer, “Rb-Sr and U-Th-Pb Systematics of Alkaline Rocks: The Alkaline Rocks from Italy,” Geochim. Cosmocim. Acta 40, 283–295 (1976).CrossRefGoogle Scholar

Copyright information

© Pleiades Publishing, Ltd. 2009

Authors and Affiliations

  • S. V. Efremov
    • 1
  1. 1.Vinogradov Institute of Geochemistry and Analytical Chemistry, Siberian BranchRussian Academy of SciencesIrkutskRussia

Personalised recommendations