Stephan Mueller Special Publication Series www.stephan-mueller-spec-publ-ser.net 1868-4556 1868-4564 4 Geology, geophysics and tectonics of Northeastern Russia: a tribute to Leonid Parfenov 2009 10.5194/smsps-4-157-2009 http://www.stephan-mueller-spec-publ-ser.net/4/157/2009/ http://www.stephan-mueller-spec-publ-ser.net/4/157/2009/smsps-4-157-2009.html http://www.stephan-mueller-spec-publ-ser.net/4/157/2009/smsps-4-157-2009.pdf 157 175 2009-09-17 Geochronology and thermochronology of Cretaceous plutons and metamorphic country rocks, Anyui-Chukotka fold belt, North East Arctic Russia E. L. Miller S. M. Katkov A. Strickland J. Toro V. V. Akinin T. A. Dumitru Department of Geological and Environmental Sciences, Stanford University, Stanford, CA, USA The Geological Institute, Russian Academy of Science, Moscow, Russia Department of Geology & Geography, West Virginia University, Morgantown, WV, USA North-East Interdisciplinary Science Research Institute FEB RAS, Magadan, Russia U-Pb isotopic dating of seven granitoid plutons and associated intrusions from the Bilibino region (Arctic Chukotka, Russia) was carried out using the SHRIMP-RG. The crystallization ages of these granitoids, which range from approximately 116.9±2.5 to 108.5±2.7 Ma, bracket two regionally significant deformational events. The plutons cut folds, steep foliations and thrust-related structures related to sub-horizontal shortening at lower greenschist facies conditions (D1), believed to be the result of the collision of the Arctic Alaska-Chukotka microplate with Eurasia along the South Anyui Zone (SAZ). Deformation began in the Late Jurassic, based on fossil ages of syn-orogenic clastic strata, and involves strata as young as early Cretaceous (Valanginian) north of Bilibino and as young as Hauterivian-Barremian, in the SAZ. The second phase of deformation (D2) is developed across a broad region around and to the east of the Lupveem batholith of the Alarmaut massif and is interpreted to be coeval with magmatism. D2 formed gently-dipping, high-strain foliations (S2). Growth of biotite, muscovite and actinolite define S2 adjacent to the batholith, while chlorite and white mica define S2 away from the batholith. Sillimanite (± andalusite) at the southeastern edge the Lupveem batholith represent the highest grade metamorphic minerals associated with D2. D2 is interpreted to have developed during regional extension and crustal thinning. Extension directions as measured by stretching lineations, quartz veins, boudinaged quartz veins is NE-SW to NW-SE. Mapped dikes associated with the plutons trend mostly NW-SE and indicate NE-SW directed extension. 40Ar/39Ar ages from S2 micas range from 109.3±1.2 to 103.0±1.8 Ma and are interpreted as post-crystallization cooling ages following a protracted period of magmatism and high heat flow. Regional uplift and erosion of many kilometers of cover produced a subdued erosional surface prior to the eruption of volcanic rocks of the Okhotsk-Chukotka volcanic belt (OCVB) whose basal units (~87 Ma) overlie this profound regional unconformity. A single fission track age on apatite from granite in the Alarmaut massif yielded an age of 90±11 Ma, in good agreement with this inference. Akinin, V. V., Hourigan, J. K., Wright, J. E., Miller, E. L., and Mishin, L. F.: New data on age of Okhotsk-Chukotka volcanic belt (U-Pb SHRIMP dating): Isotopic dating of processes of ore formation, magmatism, sedimentation, and metamorphism. Proceedings of 3rd all Russian conference on isotopic geochronology, Moscow, GEOS, 1, 22–26, 2006 \mbox(in Russian). Akinin, V. V. and Khanchuk, A. I.: The Okhotsk-Chukotka Volcanogenic Belt: Age Revision Based on New 40Ar/39Ar and U-Pb Isotope Data, Dokl. Earth Sci., 405(8), 1131–1135, 2005. Akinin, V. V. and Kotlyar, I. N.: GEOCHRON: The computer database of isotopic dating of minerals, rocks, and ores in Northeastern Siberia, in: Magmatism and mineralization in northeastern Siberia, edited by:Byalobzeski, S. G., Northeast Interdisciplinary Science Research Institute, Magadan, Russia, 314–318, 1997 \mbox(in Russian). Akinin, V. V, Miller, E. L., and Wooden, J.: Petrology and Geochronology of crustal xenoliths from the Bering Strait region: Linking deep and shallow processes in extending continental crust, in: Crustal cross-secctions from the western North American Cordillera and elsewhere: Implications for tectonic and petrologic processes, edited by: Miller, R. B. and Snoke, A. W., Geol. Soc. Am. Special Paper, 4XX, in press, 2009. Akimenko, G. I.: Crustal Cross Sections from the Western North American Cordillera and Elsewhere,in: Implications for Tectonic and Petrologic Processes, edited by: Miller, R. B. and Snoke, A. W., SPE456: ISBN 978-0-8137-2456-0, Geologic Map, R-58-XXXV, XXXVI (Bilibino), 1:200 000 scale, 2000. Amato, J. M. and Miller, E. L.: Geologic map and summary of the evolution of the Kigluaik Mountains gneiss dome, Seward Peninsula, Alaska, in: Gneiss Domes in Orogeny, edited by: Whitney, D. L, Teyssier, C., and Siddoway, C. S., Geol. Soc. Am. Special Paper, 380, 295–306, 2004. Baranov, M. A.: Nappe tectonics of the Myrgovaam Basin in North-western Central Chukotka, Tikhookean. Geol., 12, 441–448, 1996. Belik, G. Ya. and Sosunov, G. M. (Eds.): Geologic map of USSR: North-Eastern Geological Directorate, Anyuisko-Chaunskaya series, R-58-XXIX, XXX, 1 sheet, scale 1:200 000, 1969. Bogdanov, N. A. and Til'man, S. M.: Tectonics and geodynamics of the northeast of Asia (explanatory note to the tectonic map), 54~pp., 1992. Bondarenko, G. E. and Luchitskaya, M. T.: Tectonic evolution of the Alarmaut uplift, western Chukchi Peninsula, Northeastern Asia, Bull. MOIP, Geological Section, 78, 25–37, 2003. Bondarenko, G. E., Soloviev, A. V., Tuchkova, M. I., Garver, J. I., and Podgornyi, I. I.: Age of detrital zircons from sandstones of the Mesozoic flysch formation in the South Anyui suture zone (western Chukoktka), Lithol. Miner. Resour., 38(2), 162–176, 2003. Chasovitin, M. D. and Shpetnyi, A. P.: Geologic map of USSR: North-Eastern Geological Directorate, Anyuisko-Chaunskaya series, Map R-58-XXXIII, XXXIV, scale 1:200 000, 1964. Cherniak, D. J.: Lead diffusion in titanite and preliminary results on the effects of radiation damage on Pb transport, Chem. Geol., 110, 177–194, 1993. Clement, S. W. J. and Compston, W.: Ion probe parameters for very high resolution without loss of sensitivity, US Geological Survey Circular, 1107, 62~pp., 1994. Dahl, P. S.: A crystal-chemical basis for Pb retention and fission track annealing systematics in U-bearing minerals, with implications for geochronology, Earth Planet. Sc. Lett., 150(3–4), 277–290, 1997. Dovgal, Yu. M.: National Geologic map of USSR, MinGeo Russ., Magadan, Anyui-Chaun Series, Sheet Q-58-IX, X, scale 1:200 000, 1964. Filatova, N. I. and Khain, V. E.: Tectonics of the eastern Arctic region, Geotektonica, 3, 3–29, 2007. Frost, B. R., Chamberlain, K. R., and Schumacher, J. C.: Sphene (titanite): phase relations and role as a geochronometer, Chemical Geology, 172, 131–148, 2000. Galbraith, R. F. and Laslett, G. M: Statistical models for mixed fission track ages, Nucl. Tracks Rad. Meas., 21, 459–470, 1993. Gel'man, M. L.: Triasovaya diabasovaya formatisiya Anyuiskoi zony (Chukotka) (Triassic diabase association in the Anuy fold zone (Chukotka), Geol. Geofiz., 2, 127–134, 1963a. Gel'man, M. L.: Deep facies of Cretaceous granites in the Anyui Zone, I. Reports on the Geology and Ores of the Northeastern USSR, SVGU, Magadan, 16, 213–233, 1963b. Gel'man, M. L. (Ed.) and Sadovskii, A. I. : Geologic map of USSR: North-Eastern Geological Directorate, Anyuisko-Chaunskaya series, R-58-XXVII, XXVIII, 1 sheet, scale 1:200 000, 1967. Gradstein, F., Ogg, J., and Smith, A.: A Geologic Time Scale, Cambridge University Press, 589~pp., 2004. Grantz, A., May, S. D., and Hart, P. E.: Geology of Arctic continental margin of Alaska, in: The Geology of North America, v L, The Arctic Ocean region, edited by: Grantz, A., Johnson, L., and Sweeney, J. F., Geol. Soc. Am., Boulder, CO, 257–288, 1990. Grantz, A., May, S. D., Taylor, P. T., and Lawver, L. A.: Canada Basin, in: The Geology of North America, v L, The Arctic Ocean region, edited by: Grantz, A., Johnson, L., and Sweeney, J. F., Geological Society of America, Boulder, CO, 397–402, 1990. Green, P. F.: A new look at statistics in fission-track dating, Nucl. Tracks Rad. Meas., 5, 77–86, 1981. Harrison, T. M., Duncan, I., and McDougall, I.: Diffusion of 40Ar in biotite: Temperature, pressure and compositional effects, Geochim. Cosmochim. Ac., 49, 2461–2468, 1985. Hourigan, J. K. and Akinin, V. V.: Tectonic and chronostratigraphic implications of new 40Ar/39Ar geochronology and geochemistry of the Arman and Maltan-Ola volcanic fields, Okhotsk-Chukotka volcanic belt, northeastern Russia, Geological Society of America Bulletin, 116, 637–654, 2004. Hurford, A. J. and Green, P. F.: The zeta age calibration of fission-track dating, Chem. Geol., 41, 285–317, 1983. Ireland, T. R. and Williams, I. S.: Considerations in zircon geochronology by SIMS, in: Zircon, edited by: Hanchar, J. M. and Hoskins, P. W. O., Rev. Mineral. Geochem., 53, 215–241, 2003. Katkov, S. M., Miller, E. L., Podgorny, I. I., and Toro, J.: Deformation history of central Chukotka (Alarmaut Uplift), northeastern Arctic Russia, in: Origin of Northeastern Russia: Paleomagnetism, Geology and Tectonics, edited by: Stone, D. B., Geophys. Inst. Rept UAG-R-330, University of Alaska, Fairbanks, AK, CD, 2006. Kos'ko, M. K., Cecile, M. P., Harrison, J. C., Ganelin, V. G., Khandoshko, N. V., and Lopatin, B. G.: Geology of Wrangel Island, between Chukchi and East Siberian seas, northeastern Russia, Geological Survey of Canada, Bulletin, 461, 107~pp., 1993. Lane, L. S, Layer, P. W, Cecile, M. P., and Kos'ko, M.: Ar-Ar ages from the Okhotsk-Chukotks magmatic arc, III Int. Conf. Arctic Margins (ICAM), Celle, Germany 12–16, 106–107, 1998. Lawver, L. A., Grantz, A., and Gahagan, L.: Plate Kinematic evolution of the present Arctic region since the Ordovician, in: Tectonic Evolution of the Bering Shelf-Chukchi Sea-Arctic Margin and Adjacent Landmasses, edited by: Miller, E. L., Grantz, A., and Klemperer, S. L., Geol. Soc. Am. Special Paper, 360, 333–358, 2002. Ludwig, K. R.: Isoplot 3.00, a geochronological toolkit for Excel, Berkeley Geochron. Center Spec. Pub. 4., 2003. Mezger, K. and Krogstad, E. J.: Interpretation of discordant U-Pb zircon ages; an evaluation, J. Metamorph. Geol., 15(1), 127–140, 1997. Miller, E. L., Toro, J., Gehrels, G., Amato, J. M., Prokopiev, A., Tuchkova, M. I., Akinin, V. V., Dumitru, T. A., Moore, T. E., and Cecile, M. P.: New Insights into Arctic paleogeography and tectonics from U-Pb detrital zircon geochronology, Tectonics, 25, TC3013, doi:10.1029/2005TC001830, 2006. Miller, E. L., Soloviev, A., Kuzmichev, A., Gehrels, G., Toro, J. and Tuchkova, M.: Jura–Cretaceous foreland basin deposits of the Russian Arctic: Separated by birth of Makarov Basin?, Norw. J. Geol., 88, 227–250, 2008. Miller, E. L. and Verzhbitsky, V. E: Structural studies near Pevek, Russia: Implications for formation of the East Siberian Shelf and Makarov Basin of the Arctic Ocean, in: Origins of Northeastern Russia: Paleomagnetism, Geology and Tectonics: A volume in honor of L. Parfenov, edited by: Stone, D. B., Miller, E. L., Toro, J., et al., Stephan Mueller Spec. Publ. Ser., this volume. Muir, R. J., Ireland, T. R., Weaver, S. D., and Bradshaw, J.D.: Ion microprobe dating of Paleozoic granitoids: Devonian magmatism in New Zealand and correlations with Australia and Antarctica, Chem. Geol., 127(1–3), 191–210, 1996. Natal'in, B. A., Amato, J. M., Toro, J., and Wright, J. E.: Paleozoic rocks of northern Chukotka Peninsula, Russian Far East; implications for the tectonics of the Arctic region, Tectonics, 18, 977–1003, 1999. Nokleberg, W. J., Parfenov, L. M., Monger, J., et al.: Circum-North Pacific tectono-stratigraphic terrane map, US Geological Survey Open-File Report 94–714, 2 sheets, scale 1:5 000 000, 433~pp., 1994. Nokleberg, W. J., Parfenov, L. M., Monger, J. W. H., Norton, I. O., Khanchuk, A. I., Stone, D. B., Scholl, D. W., and Fujita, K.: Phanerozoic Tectonic Evolution of the Circum-North Pacific, US Geological Survey Open-File Report 98–754, 126~pp., 1998. Parfenov, L. M.: Continental margin and island-arcs of the Mesozoids, northeast Asia: Novosibersk, Nauka, 192~pp., 1984. Parfenov, L. M.: Tectonics of the Verkhoyansk-Kolyma Mesozoids in the context of plate tectonics, Tectonophysics, 199, 319–342, 1991. Parfenov, L. M.: Accretionary history of northeast Asia, in: Proceedings of the 1994 International Conference on Arctic Margins, edited by: Thurston, D. and Fujita, K., US Dep. Int., Min. Manag. Serv., Anchorage, 183–188, 1994. Rowley, D. B. and Lottes, A. L.: Plate-kinematic reconstructions of the North Atlantic and Arctic: Late Jurassic to Present, Tectonophysics 155, 73–120, 1988. Sadovskiy, A. I. and Gel'man, M. L.: The geological map of the USSR, Anyuisko-Chaunskaya series, Explanatory note, Sheet R-XXVII, XXVIII, scale 1:200 000, 1970. Seslavinskiy, K. B.: The south Anyui suture (western Chukotka), Dokl. Akad. Nauk SSSR+, 249, 1181–1185, 1979 \mbox(in Russian). Sokolov, S. D., Bondarenko, G. Ye., Morozov, O. L., Shekhovtsov, V. A., Glotov, S. P., Ganelin, A. V., Kravchenko, B., and Berezhnoy, I. R.: South Anyui suture, Northeast Arctic Russia; facts and problems, in: Tectonic Evolution of the Bering Shelf-Chukchi Sea-Arctic Margin and Adjacent Landmasses, edited by: Miller, E. L., Grantz, A., and Klemperer, S. L., Geol. Soc. Am. Special Paper, 360, 209–224, 2002. Sosunov, G. M. and Til'man, S. M. (Eds.): Geologic map of USSR: North-Eastern Geological Directorate, Anyuisko-Chaunskaya series, R-58-XXXV, XXXVI, 1 sheet, scale 1:200 000, 1960. Tera, F. and Wasserburg, G. J.: U-Th-Pb systematics on lunar rocks and inferences about lunar evolution and the age of the Moon, in: Proceedings of 5th Lunar Sci. Conf. (Supp 5, Geochim. Cosmochim. Acta), 2, 1571–99, 1974. Tikhomirov, P. L., Akinin, V. V., Ispolatov, V. O., Alexander, P., Cherepanova, I. Yu., and Zagoskin, V. V.: The Okhotsk-Chukotka Volcanic Belt: Age of its northern part according to new Ar-Ar and U-Pb geochronological data, Stratigr. Geo. Correl., 14(5), 524–537, 2006. Tuchkova, M. I., Bondarenko, G. E., Buyakaite, M. I., Golovin, D. I., Galuskina, I. O., and Pokrovskaya, E. V.: Deformation of the Chukchi microcontinent: Structural, lithologic and geochronologic evidence, Geotectonics, 41(5), 403–421, 2007. Tuchkova, M. I., Miller, E. L., Bondarenko, G. Y., Gehrels, G. E., Bujakaite, M. I., and Golovin, D. I.: Paleogeographical reconstruction on Triassic sedimentary basin of western Chukotka: Facial, petrographical and isotopic data, in: Sedimentary processes: Sedimentation, lithogenesis and ore generation, 1, 203–04, 2006 \mbox(in Russian). Verts, L. A., Chamberlain, K. R., and Frost, C. D.: U-Pb sphene dating of metamorphism: the importance of sphene growth in the contact aureole of the Red Mountain pluton, Laramie Mountains, Wyoming, Contr. Min. Pet., 125, 186–199, 1996. Unruh, J. R., Dumitru, T. A., and Sawyer, T. L.: Coupling of early Tertiary extension in the Great Valley forearc basin with blueschist exhumation in the underlying Franciscan accretionary wedge at Mt Diablo, California, Geol. Soc. Am. Bull., 119, 1347–1367, 2007. Williams, I. S.: U-Th-Pb geochronology by ion microprobe: not just ages but histories, Soc. Econ. Geol. Rev. Econ. Geol., 7, 1–35, 1997.