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Revision of the "oldest" rocks age in the crystalline basement of NE Poland
Języki publikacji
Abstrakty
The oldest geochronological results between 2.69–2.57 Ga was previously obtained by using K–Ar method on biotite from pegmatite from Jastrzębna IG–1 borehole. In consequence, in many published reports up to 1998, the Mazowsze (or Masovian) granitoid massif has been regarded as Archean age structure. Therewithal, other rocks in the area, e.g. Bargłów gneiss sequence traditionally were described as Archean in age. In the paper we present new U–Pb SHRIMP zircon and monazite results for above mentioned rocks which have been considered as Archean. Cathodoluminescence images and SHRIMP analysis were carried out for zircons and monazites from Jastrzebna IG–1 pegmatite of 514 m depth (a historical sample previously dated by K–Ar method) and for zircon magmatic cores from Bargłów IG–2 orthogneiss of the 708 m depth. The obtained U–Pb ages of 1826 š12 Ma (zircon) and 1789š34 Ma (monazite), and 1835š28 Ma (zircon) for two rock samples respectively have shown Paleoproterozoic origin. Only 4 of the 24 analysed zircons have clearly discordant results, which are all from the Jastrzebna pegmatite, where Pb–loss was possible (in partially metamict U–rich zircon grains). The new U–Pb SHRIMP dating indicates that Jastrzębna pegmatite and Bargłów magmatic protolith of the orthogneiss is only Late Paleoproterozoic in age and in general about 700 Ma younger than previously reported by K–Ar method. Therefore, there is no unequivocal evidence of the presence of Archean rocks in crystalline basement of NE Poland. This study has been undertaken as a part of a collaborative research agreement between the Polish Geological Institute and Geochronology and Isotope Geochemistry Research School of Earth Sciences of the Australian National University in Canberra.
Czasopismo
Rocznik
Tom
Strony
967--967, 973
Opis fizyczny
Bibliogr. 24 poz., fot.,tab.,wykr
Twórcy
autor
autor
autor
- Polish Geological Institute, ul. Rakowiecka 4, 00-975 Warszawa, Poland, Ewa.Krzemińska@pgi.gov.pl
Bibliografia
- AKSAMENTOVA N.V. & NAYDENKOV I.V. 1990 - Geological Map of Crystalline basement of Belorussia and Adjoning Areas in the scale 1:1 000 000. Institute of Geochemistry and Geophisics of the Academy of Sciences of the Belorussian SSR, Minsk.
- AKSAMENTOVA N. V. & NAYDENKOV I. V. 1991 - Explanatory note of the Geological Map of Crystalline basement of Belorussia and Adjoning Areas in the scale 1 : 1 000 000. Institute of Geochemistry and Geophisics of the Academy of Sciences of the Belorussian SSR, Minsk: 1-78.
- BELOUSOVA E., GRIFFIN W.L., O'REILLY S.Y. & FISHER N. I. 2002 - Igneous zircon: trace element composition as indicator of source rock type. Contrib. Mineral. Petrol., 143: 602-622.
- BOGDANOVA S.V., BIBIKOVA E.V. & GORBATSCHEV R. 1994 - Palaeoproterozoic U-Pb zircon ages from Belorussia: new geodynamic implications for the East European Craton. Precambrian Research, 68: 231-240.
- BOGDANOVA S.V., GORBATSCHEV R. & GARETSKY R.G. 2005 - The East European Craton. [In:] Selley R.C., Cocks L.R. & Plimer I.R. (eds) - Encyclopedia of Geology. Elsevier, 2: 34-49.
- CLAESSON S. & RYKAW. 1999 - Nd model ages of the Precambrian crystalline basement of the NE Poland. Between EUROBRIDGE and TESZ, Abstr. Seventh Eurobridge Workshop: May 26-30, 1999. Szelment Poland, 17.
- CLAESSON S., BOGDANOVA S.V., BIBIKOVA E.V. & GORBATSCHEV R. 2001 - Isotopic evidence for Palaeoproterozoic accretion in the basement of the East European Craton. Tectonophysics, 339: 1-18.
- CORFU F., HANCHAR J.M., HOSKIN W.O. & KINNY P. 2003 - ATLAS OF ZIRCON TEXTURES [In:] Hanchar J. M.,, Hoskin W. O. (ed.) - Zircon, Reviews in Mineralogy & Geochemistry, 53: 469-495.
- CYMERMAN Z. 2004- Prekambr platformy wschodniśuropejskiej na obszarze Polski: Tektonika i rozwój skorupy. Pr. Państw. Inst. Geol., 180: 1-129.
- DAVIS D.W.,WILLIAMS I.S. & KROGH E.B. 2003 - Historical development of geochronology. [In:] Hanchar J. M., Hoskin W. O. (ed.) - Zircon, Rev. Mineralogy & Geochemistry, 53: 145-181.
- DEPCIUCH T., LIS J. & SYLWESTRZAK H. 1975-Wiek izotopowy K-Ar skał podłoża krystalicznego północno-wschodniej Polski. Kwart. Geol., 19: 759 -779.
- GEIH M. A., SCHLEICHER H. & NEWCOMB C. 1990 - Absolute Age Determination. Physical and Chemical Dating Methods and Their Application. Springer Verlag, Berlin: 1-503
- JACKOWICZ E. 2002 - Wyniki badań skał podłoża krystlicznego. [In:] Jackowicz E. (red.) - Profile głębokich otworów wiertniczych PIG Bargłów IG-1 IG-2, 101: 22-48.
- KRZEMIŃSKA E., WILLIAMS I.S. & WISZNIEWSKA J. 2005 - A Late Paleoproterozoic (1.80 Ga) subduction-related mafic igneous suite from Lomza, NE Poland. Terra Nova, 17: 442-449.
- KUBICKI S. & RYKAW. 1982 - Atlas geologiczny podloża krystalicznego polskiej części platformy wschodnioeuropejskiej. Inst. Geol. Warszawa.
- KUBICKI S. 2002 - Wstęp oraz Wnioski [In:] Jackowicz E. (red.) - Profile głębokich otworów wiertniczych PIG Bargłów IG-1 IG-2, 101: 5-7; 60.
- MEZGER K. & KROGSTAD E. J. 1997 - Interpretation of discordant U-Pb zircon ages: an evaluation. J. Metamorphic Petrol., 15: 127-140.
- RYKAW. 1984 - Precambrian evolution of the East European Platform in Poland. Biull. Inst. Geol., 347: 17-28.
- RYKAW. 1993 - fundament krystaliczny Suwalszczyzny. Prz. Geol., 41: 546-551.
- RYKAW. 1998 - Geologic position of the Suwałki Anorthosite Massif. Pr. Państw. Inst. Geol., 161: 19-26.
- RYKAW., JACKOWICZ E. & ŻACZKIEWICZ B. 2002 - Podłoże krystaliczne [In:] Jackowicz E. (red.) - Profile głębokich otworów wiertniczych PIG Bargłów IG-1, IG-2, z.101: 13-15.
- WILLIAMS I.S. & CLAESSON S. 1987 - Isotopic evidence for the Precambrian provenance and Caledonian metamorphism of high grade paragneisses from the Seve Nappes, Scandinavian Caledonides. II. Ion microprobe zircon U-Th-Pb. Contribution to Mineralogy and Petrology, 97: 205-217.
- WILLIAMS M. L., JERCINOVIC M.J., GONCALVES R. & MAHAN K. 2006 - Format and philosophy for collecting, compiling and reporting microprobe monazite ages. Chem. Geol., 225: 1-15.
- WYBRANIEC S. 1999. - Transformation and visualization of potential field data. Polish Geological Institute, Special Papers 1: 1-88.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUS2-0012-0048