Skip to content

Research at St Andrews

The origin of the Palaeoproterozoic AMCG complexes in the Ukrainian Shield: new U-Pb ages and Hf isotopes in zircon

Research output: Contribution to journalArticlepeer-review

Author(s)

Leonid Shumlyanskyy, Chris Hawkesworth, Kjell Billström, Svetlana Bogdanova, Oleksandr Mytrokhyn, Rolf Romer, Bruno Dhuime, Stefan Claesson, Richard Ernst, Martin Whitehouse, Olena Bilan

Abstract

The Ukrainian shield hosts two Palaeoproterozoic anorthosite-mangerite-charnockite-granite (AMCG) complexes (the Korosten and Korsun-Novomyrhorod complexes) that intruded Palaeoproterozoic continental crust in north-western and central parts of the shield, respectively. We report results of U-Pb zircon and baddeleyite dating of 16 samples from the Korosten plutonic complex (KPC), and 6 samples from the Korsun-Novomyrhorod plutonic complex (KNPC). Fifteen zircon samples from both complexes were also analysed for Hf isotopes. These new, together with previously published data indicate that the formation of the KPC started at c. 1815 Ma and continued until 1743 Ma with two main phases of magma emplacement at 1800-1780 and 1770-1758 Ma. Each of the main phases of magmatic activity included both basic and silicic members. The emplacement history of the KNPC is different from that of the KPC. The vast majority of the KNPC basic and silicic rocks were emplaced between c. 1757 and 1750 Ma; the youngest stages of the complex are represented by monzonites and syenites that were formed between 1748 and 1744 Ma. Both Ukrainian AMCG complexes are closely associated in space and time with mantle-derived mafic and ultramafic dykes. The Hf isotope ratios in the zircons indicate a predominantly crustal source for the initial melts with some input of juvenile Hf from mantle-derived tholeiite melts.
The preferred model for the formation of the Ukrainian AMCG complexes involves the emplacement of large volumes of hot mantle-derived tholeiitic magma into the lower crust. This resulted in partial melting of mafic lower-crustal material, mixing of lower crustal and tholeiitic melts, and formation of ferromonzodioritic magmas. Further fractional crystallization of the ferromonzodioritic melts produced the spectrum of basic rocks in the AMCG complexes. Emplacement of the ferromonzodioritic and tholeiitic melts into the middle crust and their partial crystallization caused abundant melting of the ambient crust and formation of the large volumes of granitic rocks present in the complexes.
Close

Details

Original languageEnglish
Pages (from-to)216-239
Number of pages24
JournalPrecambrian Research
Volume292
Early online date17 Feb 2017
DOIs
Publication statusPublished - May 2017

    Research areas

  • AMCG complexes, Hf isotopes, Proterozoic, Ukrainian shield, U-Pb geochronology

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Using zircon in mafic migmatites to disentangle complex high-grade gneiss terrains – Terrane spotting in the Lewisian complex, NW Scotland

    Fischer, S., Prave, A., Johnson, T., Cawood, P. A., Hawkesworth, C., Horstwood, M. & EIMF, Apr 2021, In: Precambrian Research. 355, 106074.

    Research output: Contribution to journalArticlepeer-review

  2. Geological archive of the onset of plate tectonics

    Cawood, P. A., Hawkesworth, C. J., Pisarevsky, S. A., Dhuime, B., Capitanio, F. A. & Nebel, O., 13 Nov 2018, In: Philosophical Transactions of the Royal Society. A, Mathematical, Physical and Engineering Sciences . 376, 2132, 30 p., 20170405.

    Research output: Contribution to journalArticlepeer-review

  3. Continental crustal volume, thickness and area, and their geodynamic implications

    Cawood, P. A. & Hawkesworth, C. J., 7 Nov 2018, In: Gondwana Research. In press

    Research output: Contribution to journalArticlepeer-review

  4. Carbonated mantle domains at the base of the Earth's transition zone

    Sun, W., Hawkesworth, C. J., Yao, C., Zhang, C., Huang, R., Liu, X., Sun, X., Ireland, T., Song, M., Ling, M., Ding, X., Zhang, Z., Fan, W. & Wu, Z., 5 Feb 2018, In: Chemical Geology. 478, p. 69-75

    Research output: Contribution to journalArticlepeer-review

  5. Continental growth seen through the sedimentary record

    Dhuime, B., Hawkesworth, C. J., Delavault, H. & Cawood, P. A., 15 Jul 2017, In: Sedimentary Geology. 357, p. 16-32 17 p.

    Research output: Contribution to journalArticlepeer-review

Related by journal

  1. The Mesoarchaean Akia terrane, West Greenland, revisited: new insights based on spatial integration of geophysics, field observation, geochemistry and geochronology

    Steenfelt, A., Hollis, J., Kirkland, C. L., Sandrin, A., Gardiner, N. J., K. H. Olierook, H., Szilas, K., Waterton, P. & Yakymchuk, C., Jan 2021, In: Precambrian Research. In press, 105958.

    Research output: Contribution to journalArticlepeer-review

  2. Using zircon in mafic migmatites to disentangle complex high-grade gneiss terrains – Terrane spotting in the Lewisian complex, NW Scotland

    Fischer, S., Prave, A., Johnson, T., Cawood, P. A., Hawkesworth, C., Horstwood, M. & EIMF, Apr 2021, In: Precambrian Research. 355, 106074.

    Research output: Contribution to journalArticlepeer-review

  3. A marine origin for the late Mesoproterozoic Copper Harbor and Nonesuch Formations of the Midcontinent Rift of Laurentia

    Jones, S. M., Prave, A. R., Raub, T. D., Cloutier, J., Stüeken, E. E., Rose, C. V., Linnekogel, S. & Nazarov, K., Jan 2020, In: Precambrian Research. 336, 105510.

    Research output: Contribution to journalArticlepeer-review

  4. Mesoarchean partial melting of mafic crust and tonalite production during high-T–low-P stagnant tectonism, Akia Terrane, West Greenland

    Yakymchuk, C., Kirkland, C. L., Hollis, J. A., Kendrick, J., Gardiner, N. J. & Szilas, K., Apr 2020, In: Precambrian Research. 339, 105615.

    Research output: Contribution to journalArticlepeer-review

  5. Oxygenated conditions in the aftermath of the Lomagundi-Jatuli Event: the carbon isotope and rare earth element signatures of the Paleoproterozoic Zaonega Formation, Russia

    Kreitsmann, T., Lepland, A., Bau, M., Prave, A., Paiste, K., Mänd, K., Sepp, H., Martma, T., Romashkin, A. E. & Kirsimäe, K., Sep 2020, In: Precambrian Research. 347, 16 p., 105855.

    Research output: Contribution to journalArticlepeer-review

ID: 249184101

Top