Abstract
New results on the study of the geochemical and Sr–Nd isotopic compositions of effusive and explosive rocks of the Oxfordian–Kimmeridgian Kulpolnei complex and dikes intruding this complex, located in the northwestern part of the South Anyui suture are presented. It is established that effusive and explosive rocks were formed within an intraoceanic convergent boundary (back-arc basin and/or island arc). The volcanics of the Kulpolnei complex are intruded by diorite and plagiogranite dikes, which are deformed together with the host rocks. The concordant U–Th–Pb (SIMS) ages of zircons from dikes are 143 ± 1 to 140 ± 1 Ma. The similarity between the geochemical compositions of volcanics and dikes suggests these units had formed in the same geodynamic setting. If this assumption is correct, the upper age limit of suprasubduction volcanism can be considered to be significantly younger, up until the Berriasian age.
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REFERENCES
G. E. Bondarenko, Extended Abstract of Doctoral Dissertation in Geology and Mineralogy (MSU, Moscow, 2004).
E. V. Vatrushkina, M. I. Tuchkova, and S. D. Sokolov, Geotectonics 53 (6), 713–726 (2019).
P. P. Lychagin, E. F. Dylevskii, V. I. Shpikerman, and V. B. Likman, Magmatism of the Central Part of the North-Eastern USSR (Far Eastern Branch USSR Acad. Sci., Vladivostok, 1989) [in Russian].
B. A. Natal’in, Early Mesozoic Eugeosynclinal Systems of the Northern Part of Pacific Ocean Margins (Nauka, Moscow, 1984) [in Russian].
L. M. Parfenov, Continental Margins and Island Arcs of Northeastern Asian Mesozoides (Nauka, Novosibirsk, 1984) [in Russian].
A. Ya. Radzivill and V. Ya. Radzivil, in Magmatism of the Northeastern Asia (Magadan, 1975), pp. 71–80 [in Russian].
S. D. Sokolov, M. I. Tuchkova, A. V. Ganelin, G. E. Bondarenko, and P. Leier, Geotectonics 49 (1), 3–27 (2015).
S. D. Sokolov, M. I. Tuchkova, and G. E. Bondarenko, in Lithosphere: Structure and Development History (Paulsen, Moscow, 2010), pp. 204–227 [in Russian].
V. A. Shekhovtsov and S. P. Glotov, The 1 : 200 000 State Geological Map of the Russian Federation, 2nd ed., Ser. Oloiskaya, Sheet No. Q-58-XI, XII, Explanatory Note, Ed. by S. D. Sokolov (2001).
J. M. Amato, J. Toro, V. V. Akinin, B. A. Hampton, A. S. Salnikov, and M. I. Tuchkova, Geosphere 11 (5), 1530–1564 (2015). https://doi.org/10 .1130/GES01165.1
T. Elliot, T. Plank, A. Zindler, W. White, and B. Bourdon, J. Geophys. Res. 102 (B7), 14991–15019 (1997).
R. F. Gribble, R. J. Stern, S. Newman, S. H. Bloomer, and T. O’Hearn, J. Petrol. 39 (1), 125–154 (1998).
T. N. Irvine and W. R. A. Baragar, Can. J. Earth Sci. 8, 523–548 (1971).
A. N. Larionov, V. A. Andreichev, and D. G. Gee, in The Neoproterozoic Timanide Orogen of Eastern Baltica, Ed. by D. G. Gee and V. L. Pease (Geol. Soc., London, 2004), Vol. 30, pp. 69–74. https://doi.org/10.1144/GSL.MEM.2004.030.01.07
K. R. Ludwig, ISOPLOT 3.75. A Geochronological Toolkit for Microsoft Excel. Berkeley Geochronol. Center Special Publication No. 5 (Berkeley Geochronol. Center, Berkeley, CA, 2012). http://www.bgc.org/isoplot_etc/isoplot/Isoplot3_75-4_15manual.pdf.
W. J. Nokleberg, L. M. Parfenov, J. W. H. Monger, I. O. Norton, A. I. Khanchuk, D. B. Stone, C. R. Scotese, D. W. Scholl, and K. Fujita, U.S. Geological Survey Professional Paper No. 1626 (2000).
J. A. Pearce, R. J. Stern, S. H. Bloomer, and P. Fryer, Geochem. Geophys. Geosyst. 6, 1–27 (2005).
S. S. Sun and W. F. McDonough, Geol. Soc. London, Spec. Publ. 42, pp. 313–345 (1989).
J. D. Winter, An Introduction to Igneous and Metamorphic Petrology (Whitman College, 2010).
Funding
This work was supported by the Russian Science Foundation (project no. 18-77-10073); the basic funding of researchers was in accordance with subsidy no. 0135-2019-0038.
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Translated by N. Astafiev
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Appendices
APPENDIX 1
Chemical and isotope (Sr, Nd) compositions of the Kulpolnei complex volcanics and Berriasian dikes.
APPENDIX 2
Results of U–Th–Pb (SIMS) dating of accessory zircons from dikes intruding volcanic rocks of the Kulpolnei complex.
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Moiseev, A.V., Maskaev, M.V., Ulyanov, D.K. et al. Kulpolnei Volcanic Complex of the South Anyui Suture (West Chukotka): Composition, Age, and Paleotectonic Interpretations. Dokl. Earth Sc. 499, 564–569 (2021). https://doi.org/10.1134/S1028334X21070060
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DOI: https://doi.org/10.1134/S1028334X21070060