Pluton construction and deformation in the Sveconorwegian crust of SW Norway: magnetic fabric and U-Pb geochronology of the Kleivan and Sjelset granitic complexes
Anisotropy of magnetic susceptibility; Zircon geochronology; CA-ID-TIMS U-Th-Pb dating; Synfolding; Granite emplacement; Sveconorwegian orogeny
Abstract :
[en] The Kleivan and Sjelset granitic complexes are two composite plutons, containing both orthopyroxene and biotite (± hornblende) facies, emplaced in the Sveconorwegian (Grenvillian) high-grade basement of SW Norway. A structural study of these two plutons, based on the anisotropy of magnetic susceptibility (AMS) technique and combined with high-precision U-Th-Pb zircon dating, is presented here. Geochronological data demonstrate a rapid emplacement of successive magmatic pulses in the Kleivan complex (from 936.94 ± 0.42 Ma to 935.62 ± 0.67 Ma) and, on the contrary, a non-negligible rest period (~3.2 Ma) in the construction of the Sjelset complex that was formed by two pulses emplaced, respectively, at 935.67 ± 0.37 Ma and 932.43 ± 0.75 Ma. Locally discordant magnetic fabrics in the latter pluton confirm this rather protracted construction time. Thermomagnetic and hysteresis measurements supporting the AMS data indicate a magnetic mineralogy dominated by a multidomain, Ti-poor titanomagnetite, except in samples having a very low magnetic susceptibility. The susceptibility magnitudes, paramagnetic to ferromagnetic in agreement with the rock magnetic data, rely on the petrographic rock-types and on the alteration degree. Image analysis confirms that the magnetic fabric is usually coaxial with the shape fabric in both complexes, supporting the use of AMS as a proxy for the petrofabric orientation. Combined with micro- and macrostructural data, the magnetic fabric demonstrates that the Kleivan and Sjelset granitic complexes have their internal fabrics largely dominated by tectonic strain. Models of synfolding emplacement coeval with the last stage of Sveconorwegian contraction recorded in the area are proposed for the two plutons.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Bolle, Olivier ; Université de Liège - ULiège > Département de géologie > Pétrologie, géochimie endogènes et pétrophysique
Diot, Hervé; Université de La Rochelle > Faculté de Sciences et Technologie
Vander Auwera, Jacqueline ; Université de Liège - ULiège > Département de géologie > Pétrologie, géochimie endogènes et pétrophysique
Dembele, Aliou
Schittekat, Jasmine; SGS Belgium NV
Spassov, Simo; Institut Royal Météorologique - IRM > Centre de Physique du Globe
Ovtcharova, Maria; Université de Genève - UNIGE > Département des Sciences de la Terre
Schaltegger, Urs; Université de Genève - UNIGE > Département des Sciences de la Terre
Language :
English
Title :
Pluton construction and deformation in the Sveconorwegian crust of SW Norway: magnetic fabric and U-Pb geochronology of the Kleivan and Sjelset granitic complexes
Andersen, T., Andresen, A., Sylvester, A.G., Nature and distribution of deep crustal reservoirs in the southwestern part of the Baltic Shield: evidence from Nd, Sr and Pb isotope data on late Sveconorwegian granites. J. Geol. Soc., London 158 (2001), 253–267.
Barboni, M., Schoene, B., Ovtcharova, M., Bussy, F., Schaltegger, U., Gerdes, A., Timing of incremental pluton construction and magmatic activity in a back-arc setting revealed by ID-TIMS U/Pb and Hf isotopes on complex zircon grains. Chem. Geol. 340 (2013), 76–93.
Benn, K., Horne, R.J., Kontak, D.J., Pignotta, G.S., Evans, N.G., Syn-Acadian emplacement model for the South Mountain batholith, Meguma Terrane, Nova Scotia: magnetic fabric and structural analyses. Geol. Soc. Am. Bull. 109 (1997), 1279–1293.
Benn, K., Ham, N.M., Pignotta, G.S., Bleeker, W., Emplacement and deformation of granites during transpression: magnetic fabrics of the Archean Sparrow pluton, Slave Province, Canada. J. Struct. Geol. 20 (1998), 1247–1259.
Benn, K., Paterson, S.R., Lund, S.P., Pignotta, G.S., Kruse, S., Magmatic fabrics in batholiths as markers of regional strains and plate kinematics: example of the Cretaceous Mt. Stuart batholith. Phys. Chem. Earth (Part A) 26 (2001), 343–354.
Bingen, B., Demaiffe, D., van Breemen, O., Rb-Sr isotopic signature of augen gneiss suites in the Sveconorwegian Province of SW Norway. Demaiffe, D., (eds.) Petrology and Geochemistry of Magmatic Suites of Rocks in the Continental and Oceanic Crusts, 1996, U.L.B.-M.R.A.C, Bruxelles, 161–174.
Bingen, B., Davis, W.J., Hamilton, M.A., Engvik, A.K., Stein, H.J., Skår, Ø., Nordgulen, Ø., Geochronology of high-grade metamorphism in the Sveconorwegian belt, S. Norway: U-Pb, Th-Pb and Re-Os data. Norw. J. Geol. 88 (2008), 13–42.
Bingen, B., Nordgulen, Ø., Viola, G., A four-phase model for the Sveconorwegian orogeny, SW Scandinavia. Norw. J. Geol. 88 (2008), 43–72.
Bingen, B., Skår, Ø., Marker, M., Sigmond, E.M.O., Nordgulen, Ø., Ragnhildstveit, J., Mansfeld, J., Tucker, R.D., Liégeois, J.P., Timing of continental building in the Sveconorwegian orogen, SW Scandinavia. Norw. J. Geol. 85 (2005), 87–116.
Bingen, B., Stein, H.J., Bogaerts, M., Bolle, O., Mansfeld, J., Molybdenite Re-Os dating constrains gravitational collapse of the Sveconorwegian orogen, SW Scandinavia. Lithos 87 (2006), 328–346.
Bingen, B., van Breemen, O., Tectonic regimes and terrane boundaries in the high-grade Sveconorwegian belt of SW Norway, inferred from U-Pb zircon geochronology and geochemical signature of augen gneiss suites. J. Geol. Soc., London 155 (1998), 143–154.
Bogaerts, M., Scaillet, B., Liégeois, J.P., Vander Auwera, J., Petrology and geochemistry of the Lyngdal granodiorite (Southern Norway) and the role of fractional crystallisation in the genesis of Proterozoic ferro-potassic A-type granites. Precambr. Res. 124 (2003), 149–184.
Bogdanova, S.V., Bingen, B., Gorbatschev, R., Kheraskova, T.N., Kozlov, V.I., Puchkov, V.N., Volozh, Y.A., The East European Craton (Baltica) before and during the assembly of Rodinia. Precambr. Res. 160 (2008), 23–45.
Bolle, O., Diot, H., Trindade, R.I.F., Magnetic fabrics in the Holum granite (Vest-Agder, southermost Norway): implications for the late evolution of the Sveconorwegian (Grenvillian) orogen of SW Scandinavia. Precambr. Res. 121 (2003), 221–249.
Bolle, O., Diot, H., Liégeois, J.P., Vander Auwera, J., The Farsund intrusion (SW Norway): a marker of late-Sveconorwegian (Grenvillian) tectonism emplaced along a newly defined major shear zone. J. Struct. Geol. 32 (2010), 1500–1518.
Bouchez, J.L., Anisotropie de susceptibilité magnétique et fabrique des granites. Comptes Rendus de l'Académie des Sciences, Paris, Sciences de la Terre et des Planètes 330 (2000), 1–14.
Bouchez, J.L., Gleizes, G., Djouadi, T., Rochette, P., Microstructure and magnetic susceptibility applied to emplacement kinematics of granites: the example of the Foix pluton (French Pyrenees). Tectonophysics 184 (1990), 157–171.
Čečys, A., Benn, K., Emplacement and deformation of the ca. 1.45 Ga Karlshamn granitoid pluton, southeastern Sweden, during ENE-WSW Danopolonian shortening. Int. J. Earth Sci. 96 (2007), 397–414.
Clark, D.A., Magnetic petrophysics and magnetic mineralogy: aids to geological interpretation of magnetic surveys. J. Aust. Geol. Geophys. 17 (1997), 83–103.
Coint, N., Slagstad, T., Roberts, N.M.W., Marker, M., Røhr, T., Sørensen, B.E., The Late Mesoproterozoic Sirdal Magmatic Belt, SW Norway: relationships between magmatism and metamorphism and implications for Sveconorwegian orogenesis. Precambr. Res. 265 (2015), 57–77.
Corsini, M., Rolland, Y., Late evolution of the southern European Variscan belt: exhumation of the lower crust in a context of oblique convergence. C.R. Geosci. 341 (2009), 214–223.
D'Lemos, R.S., Brown, M., Strachan, R.A., Granite magma generation, ascent and emplacement within a transpressional orogen. J. Geol. Soc., London 149 (1992), 487–490.
Drüppel, K., Elsäßer, L., Brandt, S., Gerdes, A., Sveconorwegian mid-crustal ultrahigh-temperature metamorphism in Rogaland, Norway: U-Pb LA-ICP-MS geochronology and pseudosections of sapphirine granulites and associated paragneisses. J. Petrol. 54 (2013), 305–350.
Duchesne, J.C., Iron-titanium oxide minerals in the Bjerkrem-Sogndal massif, south-western Norway. J. Petrol. 13 (1972), 57–81.
Duchesne, J.C. (Ed.), 2001. The Rogaland intrusive massifs: an excursion guide. Norges geologiske undersøkelse Report 2001.029, 139 p.
Duchesne, J.C., Maquil, R., Demaiffe, D., The Rogaland anorthosites: facts and speculations. Tobi, A.C., Touret, J.L.R., (eds.) The Deep Proterozoic Crust in the North Atlantic Provinces, 1985, Reidel, Dordrecht, 449–476.
Dunlop, D.J., Özdemir, Ö., Magnetizations in rocks and minerals. Kono, M., (eds.) Treatise of Geophysics Geomagnetism, vol. 5, 2009, Elsevier, Amsterdam, 277–336.
Eliasson, T., Ahlin, S., Petersson, J., Emplacement mechanism and thermobarometry of the Sveconorwegian Bohus granite, SW Sweden. Geologiska Föreningens i Stockholm Förhandlingar 125 (2003), 113–130.
Falkum, T., The structural geology of the Precambrian Homme granite and the enveloping banded gneisses in the Flekkefjord area, Vest-Agder, Southern Norway. Norges geologiske undersøkelse 324 (1976), 79–101.
Falkum, T., Geologisk Kart Over Norge, Berggrunnskart Mandal – 1:250000. 1982, Norges geologiske undersøkelse, Trondheim.
Falkum, T., The Sveconorwegian magmatic and tectonometamorphic evolution of the high-grade Proterozoic Flekkefjord complex, South Norway. Norges geologiske undersøkelse Bulletin 434 (1998), 5–33.
Falkum, T., Petersen, J.S., A three-fold division of the 'farsundite' plutonic complex at Farsund, southern Norway. Nor. Geol. Tidsskr. 54 (1974), 361–366.
Ferré, E.C., Gébelin, A., Till, J.L., Sassier, C., Burmeister, K.C., Deformation and magnetic fabrics in ductile shear zones: a review. Tectonophysics 629 (2014), 179–188.
Ferré, E., Gleizes, G., Caby, R., Obliquely convergent tectonics and granite emplacement in the Trans-Saharan belt of Eastern Nigeria: a synthesis. Precambr. Res. 114 (2002), 199–219.
Fossen, H., Tikoff, B., 1998. Extended models of transpression and transtension, and application to tectonic settings. In: Holdsworth, R.E., Strachan, R.A., Dewey, J.F. (Eds.), Continental transpressional and transtensional tectonics, Geological Society, London, Special Publications 135, pp. 15–33.
Gleizes, G., Leblanc, D., Santana, V., Olivier, P., Bouchez, J.L., Sigmoidal structures featuring dextral shear during emplacement of the Hercynian granite complex of Cauterets-Panticosa (Pyrenees). J. Struct. Geol. 20 (1998), 1229–1245.
Gleizes, G., Nédélec, A., Bouchez, J.L., Autran, A., Rochette, P., Magnetic susceptibility of the Mont-Louis Andorra ilmenite-type granite (Pyrenees): a new tool for the petrographic characterization and regional mapping of zoned granite plutons. J. Geophys. Res. 98:B3 (1993), 4317–4331.
Henry, B., Liégeois, J.P., Nouar, O., Derder, M.E.M., Bayou, B., Bruguier, O., Ouabadi, A., Belhai, D., Amenna, M., Hemmi, A., Ayache, M., Repeated granitoid intrusions during the Neoproterozoic along the western boundary of the Saharan metacraton, Eastern Hoggar, Tuareg shield, Algeria: an AMS and U-Pb zircon age study. Tectonophysics 474 (2009), 417–434.
Hoskin, P.W.O., Schaltegger, U., The composition of zircon and igneous and metamorphic petrogenesis. Rev. Mineral. Geochem. 53 (2003), 27–62.
Hrouda, F., A technique for the measurement of thermal changes of magnetic susceptibility of weakly magnetic rocks by the CS-2 apparatus and KLY-2 Kappabridge. Geophys. J. Int. 118 (1994), 604–612.
Hutton, D.H.W., Granite emplacement mechanisms and tectonic controls: inferences from deformation studies. Trans. R. Soc. Edinburgh, Earth Sci. 79 (1988), 245–255.
Jacamon, F., Larsen, R.B., Trace element evolution of quartz in the charnockitic Kleivan granite, SW-Norway: the Ge/Ti ratio of quartz as an index of igneous differentiation. Lithos 107 (2009), 281–291.
Jelínek, V., Characterization of magnetic fabric of rocks. Tectonophysics 79 (1981), T63–T67.
Jorde, K., Sigmond, E.M.O., Thorsnes, T., Geologisk Kart Over Norge, Berggrunnskart Stavanger – 1:250000. 1995, Norges geologiske undersøkelse, Trondheim.
Li, Z.X., Bogdanova, S.V., Collins, A.S., Davidson, A., De Waele, B., Ernst, R.E., Fitzsimons, I.C.W., Fuck, R.A., Gladkochub, D.P., Jacobs, J., Karlstrom, K.E., Lu, S., Natapov, L.M., Pease, V., Pisarevsky, S.A., Thrane, K., Vernikovsky, V., Assembly, configuration, and break-up history of Rodinia: a synthesis. Precambr. Res. 160 (2008), 179–210.
Maijer, C., 1987. The metamorphic envelope of the Rogaland intrusive complex. In: Maijer, C., Padget, P. (Eds.), The geology of southernmost Norway: an excursion guide. Norges geologiske undersøkelse, Special Publication 1, pp. 68–73.
Maijer, C., Verschure, R.H., Visser, D., Strontium isotope study of two supposed satellite massifs of the Egersund Anorthosite Complex: the Sjelset Igneous Complex and the Undheim Leuconorite. Nor. Geol. Tidsskr. 74 (1994), 58–69.
Mainprice, D., Bouchez, J.L., Blumenfeld, P., Tubia, J.M., Dominant c-slip in naturally deformed quartz: implications for dramatic plastic softening at high temperature. Geology 14 (1986), 819–822.
Marker, M., Schiellerup, H., Meyer, G.B., Robins, B., Bolle, O., 2003. Geological map of the Rogaland anorthosite province – Scale 1:75000. In: Duchesne, J.C., Korneliussen, A. (Eds.), Ilmenite deposits and their geological environment. With special reference to the Rogaland anorthosite province. Norges geologiske undersøkelse, Special Publication 9, Plate 1.
Michot, P., 1960. La géologie de la catazone: le problème des anorthosites, la palingenèse basique et la tectonique catazonale dans le Rogaland méridional (Norvège méridionale). Norges geologiske undersøkelse 212g, pp. 1–54.
Passchier, C.W., Trouw, R.A.J., Microtectonics. second ed., 2005, Springer-Verlag, Berlin, Heidelberg xvi + 366 p.
Petersen, J.S., Geometrisk analyse af et polyfasefoldet grundfjeldskompleks. Dansk geologisk Forening, Årsskrift for 1973 (1973), 71–81.
Petersen, J.S., The migmatite complex near Lyngdal, southern Norway, and related granulite metamorphism. Nor. Geol. Tidsskr. 57 (1977), 65–83.
Petersen, J.S., The zoned Kleivan granite – an end member of the anorthosite suite in southwest Norway. Lithos 13 (1980), 79–95.
Petersen, J.S., Pedersen, S., Strontium-isotope study of the Kleivan granite, southern Norway. Nor. Geol. Tidsskr. 58 (1978), 97–102.
Petrovský, E., Kapička, A., On determination of the Curie point from thermomagnetic curves. J. Geophys. Res., 111, 2006, B12S27.
Pignotta, G.S., Benn, K., Magnetic fabric of the Barrington Passage pluton, Meguma Terrane, Nova Scotia: a two-stage fabric history of syntectonic emplacement. Tectonophysics 307 (1999), 75–92.
Robinson, P., Fabian, K., McEnroe, S.A., Heidelbach, F., Influence of lattice-preferred orientation with respect to magnetizing field on intensity of remanent magnetization in polycrystalline hemo-ilmenite. Geophys. J. Int. 192 (2013), 514–536.
Rochette, P., Magnetic susceptibility of the rock matrix related to magnetic fabric studies. J. Struct. Geol. 9 (1987), 1015–1020.
Román-Berdiel, T., Casas, A.M., Oliva-Urcia, B., Pueyo, E.L., Rillo, C., The main Variscan deformation event in the Pyrenees: new data from the structural study of the Bielsa granite. J. Struct. Geol. 26 (2004), 659–677.
de Saint Blanquat, M., Horsman, E., Habert, G., Morgan, S., Vanderhaeghe, O., Law, R., Tikoff, B., Multiscale magmatic cyclicity, duration of pluton construction, and the paradoxical relationship between tectonism and plutonism in continental arcs. Tectonophysics 500 (2011), 20–33.
de Saint Blanquat, M., Tikoff, B., Development of magmatic to solid-state fabrics during syntectonic emplacement of the Mono Creek Granite, Sierra Nevada batholith. Bouchez, J.L., Hutton, D.H.W., Stephens, W.E., (eds.) Granite: From Segregation of Melt to Emplacement Fabrics, 1997, Kluwer, Dordrecht, 231–252.
Sauer, S., A Lu-Hf isotope study of zircons from high-alumina orthopyroxene megacrysts from the Neoproterozoic Rogaland Anorthosite Province, SW Norway: A window to the Sveconorwegian lower crust. Unpublished MSc Thesis, 2011, University of Bremen 87 p.
Sauter, P.C.C., Hermans, G.A.E.M., Jansen, J.B.H., Maijer, C., Spits, P., Wegelin, A., Polyphase Caledonian metamorphism in the Precambrian basement of Rogaland/Vest-Agder, SW Norway. Norges geologiske undersøkelse 380 (1983), 7–22.
Schärer, U., Wilmart, E., Duchesne, J.C., The short duration and anorogenic character of anorthosite magmatism: U-Pb dating of the Rogaland complex, Norway. Earth Planet. Sci. Lett. 139 (1996), 335–350.
Schaltegger, U., Brack, P., Ovtcharova, M., Peytcheva, I., Schoene, B., Stracke, A., Marocchi, M., Bargossi, G.M., Zircon and titanite recording 1.5 million years of magma accretion, crystallization and initial cooling in a composite pluton (southern Adamello batholith, northern Italy). Earth Planet. Sci. Lett. 286 (2009), 208–218.
Sigmond, E.M.O., Gustavson, M., Roberts, D., Berggrunnskart Over Norge – 1:1000000. 1984, Norges geologiske undersøkelse, Trondheim.
Slagstad, T., Roberts, N.M.W., Marker, M., Røhr, T.S., Schiellerup, H., A non-collisional, accretionary Sveconorwegian orogen. Terra Nova 25 (2013), 30–37.
Starmer, I.C., The Sveconorwegian Orogeny in southern Norway, relative to deep crustal structures and events in the North Atlantic Proterozoic Supercontinent. Nor. Geol. Tidsskr. 73 (1993), 109–132.
Stipp, M., Stünitz, H., Heilbronner, R., Schmid, S.M., The eastern Tonale fault zone: a 'natural laboratory' for crystal plastic deformation of quartz over a temperature range from 250 to 700 °C. J. Struct. Geol. 24 (2002), 1861–1884.
Tobi, A.C., Hermans, G.A.E.M., Maijer, C., Jansen, J.B.H., Metamorphic zoning in the high-grade Proterozoic of Rogaland-Vest Agder, SW Norway. Tobi, A.C., Touret, J.L.R., (eds.) The Deep Proterozoic Crust in the North Atlantic Provinces, 1985, Reidel, Dordrecht, 477–497.
Vander Auwera, J., Bogaerts, M., Bolle, O., Longhi, J., Genesis of intermediate igneous rocks at the end of the Sveconorwegian (Grenvillian) orogeny (S Norway) and their contribution to intracrustal differentiation. Contrib. Miner. Petrol. 156 (2008), 721–743.
Vander Auwera, J., Bogaerts, M., Liégeois, J.P., Demaiffe, D., Wilmart, E., Bolle, O., Duchesne, J.C., Derivation of the 1.0-0.9 Ga ferro-potassic A-type granitoids of southern Norway by extreme differentiation from basic magmas. Precambr. Res. 124 (2003), 107–148.
Vander Auwera, J., Bolle, O., Bingen, B., Liégeois, J.P., Bogaerts, M., Duchesne, J.C., De Waele, B., Longhi, J., Sveconorwegian massif-type anorthosites and related granitoids result from post-collisional melting of a continental arc root. Earth Sci. Rev. 107 (2011), 375–397.
Vander Auwera, J., Bolle, O., Dupont, A., Pin, C., Paquette, J.L., Charlier, B., Duchesne, J.C., Mattielli, N., Bogaerts, M., Source-derived heterogeneities in the composite (charnockite-granite) ferroan Farsund intrusion (SW Norway). Precambr. Res. 251 (2014), 141–163.
Vernon, R.H., Review of microstructural evidence of magmatic and solid-state flow. Electron. Geosci. 5:2 (2000), 1–23.
Verschure, R.H., Andriessen, P.A.M., Boelrijk, N.A.I.M., Hebeda, E.H., Maijer, C., Priem, H.N.A., Verdurmen, E.A.T., On the thermal stability of Rb-Sr and K-Ar biotite systems: evidence from coexisting sveconorwegian (ca. 870 Ma) and Caledonian (ca. 400 Ma) biotites in SW Norway. Contrib. Miner. Petrol. 74 (1980), 245–252.
