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Preliminary geochemical characteristics of amphibolites and ultramafic rocks of the West Ny-Friesland Terrane, Northern Spitsbergen
Języki publikacji
Abstrakty
The metamorphic Atomfjella Complex of the West Ny-Friesland Terrane, which belongs to the Eastern Basement Svalbard Province, is composed of four nappes, namely Dirksodden, Nordbreen, Rekvika and Finlandveggen. All these nappescomprise a granitic gneiss basement associated with a metasedimentary cover, both cut by numerous mafic dykes. At the top of the Atomfjella Complex, close to the boundary with the Mosselhalvaya Group (Nordaustlandet terrane), the lenses of ultramafic rocks also occur. Some authors suggested that they provide evidence for the presence ofa deeply rooted, large-scale tectonic boundary between the West Ny-Friesland and Nordaustlandet terranes. The performed geochemical characterization of amphibolites and ultramafic rocks showed that nearly all major elements (except Si and Fe) as well as LILE, have wide compositional ranges and no obvious trends (Bazarnik, Majka, 2021). It is conceivable that the Caledonian metamorphism may have affected K, Na and P, as well as LILE, and caused scatter of Al, Ti, Ca and Fe, and likely Si. The trace and REE elements plots are characterized mainly by trends that probably express the original magmatic processes. However, the elements that clearly deviate from these trends are disturbed due to either metamorphism or crustal assimilation. According to the Th/Yb vs Nb/Yb relationship, the studied rocks indicate generally low influence of crustal contamination, with only 3 samples in the field of MORB-OIB array (Fig. 4B). Besides the higher content of Mgandsome other minor differences in chemical composition, the ultramafic rocks exhibit trends similar to that of amphibolites. Based on this aforementioned similarity and the confirmed influence of the Caledonian metamorphism on both groups of rocks, we speculate about the common history of both groups of rocks. Moreover, thank sto the identification of metamorphic alterations in ultramafic rocks, it was proved that these rocks must be pre-Caledonian and, in turn, older than the alleged terrane boundary. Thus, the ultramafic bodies located close to the top of the Atomfjella Complex cannot mark the large terrane boundary and do not provide any evidence of a deeply rooted tectonic zone, but merely the result of ascension from deeper levels of the mantle.
Czasopismo
Rocznik
Tom
Strony
406--410
Opis fizyczny
Bibliogr.19 poz., fot., rys., tab., wykr.
Twórcy
autor
- Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy, Oddział Karpacki, ul. Skrzatów 1, 31-560 Kraków
autor
- Department of Earth Sciences, Uppsala University, Villavägen 16, 752 36 Uppsala, Sweden
autor
- Department of Earth Sciences, Uppsala University, Villavägen 16, 752 36 Uppsala, Sweden
- Wydział Geologii, Geofizyki i Ochrony Środowiska, Akademia Górniczo-Hutnicza, al. Mickiewicza 30, 30-059 Kraków
autor
- Wydział Geologii, Geofizyki i Ochrony Środowiska, Akademia Górniczo-Hutnicza, al. Mickiewicza 30, 30-059 Kraków
autor
- Norwegian Polar Institute, Framsenteret, Hjalmar Johansens gate 14, 9296, Tromso, Norway
autor
- Wydział Inżynieri Lądowej, Politechnika Krakowska, ul. Warszawska 24, 31-155 Kraków
Bibliografia
- 1. BAZARNIK J., MAJKA J., MCCLELLAND W.C., KOŚMIŃSKA K., PIEPJOHN K., ELVEVOLD S., STRAUSS J.V. 2019a - Is the Mosselhalvøya thrust a major boundary between West Ny-Friesland and Nordaustlandet terranes of the Svalbard Caledonides? T13G-0262, 2019 Fall Meeting, AGU, San Francisco, CA, 9-13 Dec.
- 2. BAZARNIK J., MAJKA J., MCCLELLAND W.C., STRAUSS J.V., KOŚMIŃSKAK., PIEPJOHN K., ELVEVOLD S., CZUPYT C., MIKUŠ T. 2019b - U-Pb zircon dating of metaigneous rocks from the Nordbreen Nappe of Svalbard's Ny-Friesland suggests their affinity to Northeast Greenland. Terra Nova, 31: 518-526.
- 3. BAZARNIK J., MAJKA J. 2021 – Raw data files and plots for the amphibolites and ultramafic rocks geochemistry from the West Ny-Friesland terrane (Eastern Svalbard Basement Province); https://osf.io/xetn5/
- 4. DALLMANN W.K., ANDRESEN A., BERGH S.G., MAHER H.D., OHTA Y. 1993 - Tertiary fold-and-thrust belt of Spitsbergen Svalbard. Norsk Polarinstitutt Rapportserie, 128: 1-46.
- 5. DALLMANN W.K., ELVEVOLD S., MAJKA J., PIEPJOHN K. 2015 - Chapter 8: tectonics and tectonothermal events. [W:] Dallmann W.K. (red). Geoscience Atlas of Svalbard. Nor Polarinst Rapportserie, Tromso, 148: 175-220.
- 6. ELVEVOLD S., DALLMANN W.K. 2011 - Geological map of Svalbard 1:100 000, sheet C4G, Mosselhalvoya. Norsk Polarinstitutt Temakart 47.
- 7. FAEHNRICH K., MAJKA J., SCHNEIDER D., MAZUR S., MANECKI M., ZIEMNIAK G., WALA V.T., STRAUSS J.V. 2020 - Geochronological constraints on Caledonian strike-slip displacement in Svalbard, with implications for the evolution of the Arctic. Terra Nova, 32: 290-299.
- 8. GEED.G., TEBENKOVA.M. 2004 - Svalbard: a fragment of the Laurentian margin. [W:] Gee D.G., Pease V. (red). The Neoproterozoic Timanide Orogen of Eastern Baltica. Geol. Soc. London, Memoir, 30: 191-206.
- 9. HARLAND W.B. 1985 - Caledonide Svalbard. [W:] Gee D.G., Sturt B.A. (red). The Caledonide Orogen - Scandinavia and Related Areas. John Wiley and Sons, Chichester: 999-1016.
- 10. HARLAND W.B., HORSFIELD W.T. 1974 - West Spitsbergen orogen. [W:] Spencer A.M. (red). Mesozoic-Cenozoic Orogenic Belts, Data for Orogenic Studies. Spec. Publ. Geol. Soc., 4: 747-755.
- 11. HELLMAN F.J., GEE D.G., JOHANSSON Å., WITT-NILSSON P. 1997 - Single-zircon Pb evaporation geochronology constrains basement-cover relationships in the lower Hecla Hoek Complex of northern Ny Friesland, Svalbard. Chem. Geol., 137:117-134.
- 12. HELLMAN F.J., GEE D.G., WITT-NILSSON P. 2001 - Late Archean basement in the Bangenhuken Complex of the Nordbreen Nappe, western Ny-Friesland, Svalbard. Polar Res., 20: 49-59.
- 13. JOHANSSON Å., GEE D.G. 1999 - The late Palaeoproterozoic Eskolabreen granitoids of southern Ny Friesland, Svalbard Caledonides - geochemistry, age and origin.Geol. Fören. Stockholm Förh., 121:113-126.
- 14. JOHANSSON Å., GEE D.G., BJÖRKLUND L., WITT-NILSSON P. 1995 - Isotope studies of granitoids from the Bangenhuken Formation, Ny Friesland Caledonides, Svalbard. Geol. Mag., 132: 303-320.
- 15. MAJKA J., KCŃMIŃSKA K. 2017 - Magmatic and metamorphic events recorded within the Southwestern Basement Province of Svalbard. Arktos, 3:5.
- 16. MAZUR S., CZERNY J., MAJKA J., MANECKI M., HOLM D.K., SMYRAK A., WYPYCH A. 2009 - A strike-slip terrane boundary in Wedel Jarlsberg Land, Svalbard, and its bearing on correlations of SW Spitsbergen with the Pearya terrane and Timanide belt. J. Geol. Soc., 166: 529-44.
- 17. MCCLELLAND W.C., VON GOSEN W., PIEPJOHN K. 2019 - Tonian and Silurian magmatism in Nordaustlandet: Svalbard's place in the Caledonian orogen. [W:] Piepjohn K., Strauss J.V., Reinhardt L., Mcclelland W.C. (red). Circum-Arctic Structural Events: Tectonic Evolution of the Arctic Margins and Trans-Arctic Links with Adjacent Orogens. Geol. Soc. Am. Sp. Pap., 541: 63-80.
- 18. MICHALSKI K., LEWANDOWSKI M., MANBY G. 2012 –New palaeomagnetic, petrographic and 40Ar/39Ar data to test palaeogeographic reconstructions of Caledonide Svalbard. Geol. Mag., 149: 696-721.
- 19. WITT-NILSSON P., GEE D.G., HELLMAN F.J. 1998 - Tectonostratigraphy of the Caledonian Atomfjella Antiform of northern Ny Friesland, Svalbard. Norsk Geologisk Tidskrift, 78: 67-80.
Uwagi
Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-29dbca78-933d-4811-acfe-b82e43546b26