REE and Lu-Hf systematics of zircons from rapakivi granites and associated rocks of supercontinent Nuna (Columbia)

详细信息    查看全文

• 作者：Yu. L. Ronkin ; A. Gerdes ; A. V. Maslov
• 刊名：Doklady Earth Sciences
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：461
• 期：1
• 页码：277-282
• 全文大小：394 KB
• 参考文献：1.D. Evans and R. Mitchell, Geology 39, 443-46 (2011).View Article
  2.V. N. Puchkov, S. V. Bogdanova, R. Ernst, V. I. Kozlov, A. A. Krasnobaev, U. Soderlund, M. T. D. Wingate, A. V. Postnikov, N. D. Sergeeva, Lithos 174, 109-24 (2013).View Article
  3.Yu. L. Ronkin, D. I. Matukov, S. L. Presnyakov, E. N. Lepekhina, O. P. Lepikhina, O. Yu. Popova, Litosfera, No. 1, 135-42 (2005).
  4.Yu. L. Ronkin, A. V. Maslov, A. P. Kazak, D. I. Matukov, O. P. Lepikhina, Dokl. Akad. Nauk 415(3), 370-78 (2007).
  5.R. E. Ernst, K. L. Buchan, M. A. Hamilton, A. V. Okrugin, M. D. Tomshin, J. Geol. 108, 381-01 (2000).View Article
  6.D. J. Thorkelson, J. A. Abbott, J. K. Mortensen, R. A. Creaser, M. E. Villeneuve, V. J. McNicoll, P. W. Layer, Canad. J. Earth Sci. 42, 1045-071 (2005).View Article
  7.R. E. Ernst and W. Bleeker, Can. J. Earth Sci. 47, 695-39 (2010).View Article
  8.J. W. Goodge and J. D. Vervoort, Earth Planet. Sci. Lett. 243, 711-31 (2006).View Article
  9.R. E. Ernst, M. T. D. Wingate, K. L. Buchan, and Z. X. Li, Precambrian Res. 160, 159-78 (2008).View Article
  10.T. Andersen, U. B. Andersson, S. Graham, G. Aberg, S. L. Simonsen, J. Geol. Soc. 166, 233-47 (2009).View Article
  11.U. B. Andersson, G. C. Begg, W. L. Griffin, and K. Hogdahl, Lithosphere 3, 409-19 (2011).View Article
  12.N. Chen, S.L. Gong, X. Xia, H. Geng, L. Wang, M. Sun, and T. M. Kusky, J. Earth Sci. 24, 29-1 (2013).View Article
  13.A. P. Heinonen, T. Andersen, and O. T. Ramo, J. Petrol. 51, 1687-709 (2010).View Article
  14.L. S. Lauri, T. Andersen, P. Holtta, H. Huhma, and S. Graham, J. Geol. Soc. 168, 201-18 (2011).View Article
  15.A. Gerdes, A. Zeh, and Yu. L. Ronkin, Abs. XX Isotope geochemistry symposium (Watercolor, Moscow, 2013), pp. 23-6.
  
• 作者单位：Yu. L. Ronkin (1)
  A. Gerdes (2)
  A. V. Maslov (1)
  
  1. Zavaritskii Institute of Geology and Geochemistry, Ural Branch, Russian Academy of Sciences, Pochtoviy per. 7, Yekaterinburg, 620075, Russia
  2. Institute of Geosciences, Johann Wolfgang Goethe University, Altenhofferallee 1, Frankfurt am Main, Germany
  
• 刊物主题：Earth Sciences, general;
• 出版者：Springer US
• ISSN：1531-8354

文摘

The last of the rifting events at 1.37-.45 Ga that is considered to have led to the final breakup of Nuna was recorded in most of its building blocks (Laurentia, Baltica, and Siberian craton). At the type locality for the Riphean on the western slope of the South Urals, this event was recognized as the Mashak igneous event (?380 Ma) and can be classified as a LIP based on the volumes of magma generated (total igneous volumes >0.05 × 106 km3). The emplacement of large volumes of A-type granitic plutons in Laurentia and northwestern Baltica (in the present coordinates) was almost synchronous with this event. In the South Urals, within the Bashkirian meganticlinorium, the processes of granite generation and emplacement during this time took place on a much smaller scale. Anorogenic granites of this region are represented by rapakivi granites of the Berdyaush massif. The first REE and Lu-Hf isotope data for zircons from rapakivi granites and associated rocks of the Berdyaush massif reveal almost identical Lu-Hf isotope ages (?383 Ma) of rapakivi granites, quartz syenitic diorites, and nepheline syenites. It was shown that these rocks, which were emplaced into the heterogeneous Proterozoic crust between the Early and Middle Riphean, have the Hf isotopic compositions and Lu-Hf model ages reflecting the contribution from crustal sources with ages of 2013-219 Ma, whereas the associated gabbros indicate derivation from a source with the Lu-Hf ages of 1658 ± 1685 Ma and moderately depleted ?_Hf(1383) of (4.1 ± 0.7-.9 ± 0.6). The REE characteristics (ΣREE, Eu/Eu*, Ce/Ce*, Pr/Pr*, La/Lu) and Lu-Hf isotope systematics of zircons can be used to constrain the history and genetic evolution of supercontinents, e.g., supercontinent Nuna (Columbia) in particular.