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Long-lived connecti...
Long-lived connection between southern Siberia and northern Laurentia in the Proterozoic
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- Ernst, R. E. (author)
- Tomsk State University,Carleton University
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- Hamilton, M. A. (author)
- University of Toronto
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- Söderlund, U. (author)
- Lund University,Lunds universitet,Berggrundsgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Lithosphere and Biosphere Science,Department of Geology,Faculty of Science
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- Hanes, J. A. (author)
- Queen's University at Kingston
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- Gladkochub, D. P. (author)
- Institute of the Earth's Crust, RAS
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- Okrugin, A. V. (author)
- Diamond and Precious Metal Geology Institute of the Siberian Branch Of The Russian Academy Of Sciences
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- Kolotilina, T. (author)
- A. P. Vinogradov Institute of Geochemistry of the Siberian Branch of the RAS
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- Mekhonoshin, A. S. (author)
- A. P. Vinogradov Institute of Geochemistry of the Siberian Branch of the RAS
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- Bleeker, W. (author)
- Geological Survey of Canada
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- LeCheminant, A. N. (author)
- Geological Survey of Canada
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- Buchan, K. L. (author)
- Geological Survey of Canada
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- Chamberlain, K. R. (author)
- University of Wyoming
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- Didenko, A. N. (author)
- Kosygin Institute of Tectonics and Geophysics
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(creator_code:org_t)
- 2016-04-11
- 2016
- English 6 s.
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In: Nature Geoscience. - : Springer Science and Business Media LLC. - 1752-0894 .- 1752-0908. ; 9:6, s. 464-469
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http://dx.doi.org/10...
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Abstract
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- Precambrian supercontinents Nuna-Columbia (1.7 to 1.3 billion years ago) and Rodinia (1.1 to 0.7 billion years ago) have been proposed. However, the arrangements of crustal blocks within these supercontinents are poorly known. Huge, dominantly basaltic magmatic outpourings and intrusions, covering up to millions of square kilometres, termed Large Igneous Provinces, typically accompany (super) continent breakup, or attempted breakup and offer an important tool for reconstructing supercontinents. Here we focus on the Large Igneous Province record for Siberia and Laurentia, whose relative position in Nuna-Columbia and Rodinia reconstructions is highly controversial. We present precise geochronology - nine U-Pb and six Ar-Ar ages - on dolerite dykes and sills, along with existing dates from the literature, that constrain the timing of emplacement of Large Igneous Province magmatism in southern Siberia and northern Laurentia between 1,900 and 720 million years ago. We identify four robust age matches between the continents 1,870, 1,750, 1,350 and 720 million years ago, as well as several additional approximate age correlations that indicate southern Siberia and northern Laurentia were probably near neighbours for this 1.2-billion-year interval. Our reconstructions provide a framework for evaluating the shared geological, tectonic and metallogenic histories of these continental blocks.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
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- art (subject category)
- ref (subject category)
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- By the author/editor
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Ernst, R. E.
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Hamilton, M. A.
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Söderlund, U.
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Hanes, J. A.
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Gladkochub, D. P ...
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Okrugin, A. V.
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show more...
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Kolotilina, T.
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Mekhonoshin, A. ...
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Bleeker, W.
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LeCheminant, A. ...
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Buchan, K. L.
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Chamberlain, K. ...
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Didenko, A. N.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Geology
- Articles in the publication
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Nature Geoscienc ...
- By the university
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Lund University