The Transscandinavian Igneous Belt (Swedish: Transskandinaviska magmatiska bältet), abbreviated TIB, is one of the major lithological units of the Baltic Shield. It consists of a series of batholiths in Sweden and Norway forming a ca. 1400 km long belt running from Lofoten, Norway, in the north to Blekinge, Sweden, in the south. The Transscandinavian Igneous Belt and its rocks solidified from magma between 1810 and 1650 million years ago during the Mesoproterozoic. The Transscandinavian Igneous Belt was likely formed in an Andean-type geological environment, implying it was once parallel to a destructive plate boundary.[1] The belt was first identified in the 1980s and was referred as the "Transscandinavian Granite-Porphyry Belt". The current name was first applied in 1987.[2]
The Transscandinavian Igneous Belt occurs as a ca. 1400 km long belt running from Lofoten in the north to Blekinge in the south.[3][4] The northern parts of the belt are partly covered by Caledoniannappes but crop out in windows (e.g. Rombak, Nasafjället). In addition to this some Caledonian nappes are made up of Transscandinavian Igneous Belt rocks.[1] Beneath the East European Platform the belt continues across the Baltic Sea to northeast Poland and Kaliningrad Oblast.[5]
Chronology
The plutons of the belt formed variously between 1810 and 1650 million years ago (Mya)[3] the oldest rocks overlapping in age with the rocks of the Svecofennian orogeny and the youngest overlapping in age with the deformation and metamorphism of the Gothian orogeny.[6] Three separate periods of igneous activity are recognised in the Transscandinavian Igneous Belt; TIB 1 (1813–1766 Mya), TIB 2 (1723–1691 Mya) and TIB 3 (1681–1657 Mya). This grouping is not perfect as it excludes the youngest units formed 1450 million years ago.[4]
Hundreds of millions of years after the Transscandinavian Igneous Belt was formed it was subject to the particular deformation, tectonics and metamorphism of the Sveconorwegian orogeny about 1100 to 990 million years ago.[3]
^ abGorbatschev, R. (2004). "1. The Transscandinavian Igneous Belt - introduction and background". In Högdahl, K.; Andersson, U.B. & Eklund, O. (eds.). The Transscandinavian Igneous Belt (TIB) in Sweden: a review of its character and evolution. Geological Survey of Finland, Special Paper 37. pp. 9–15.
^ abcHögdahl, K.; Andersson, U.B.; Eklund, O. (2004). "The Transscandinavian Igneous Belt (TIB) in Sweden: a review of its character and evolution (abstract)". Geological Survey of Finland, Special Paper. 37.
^Ryka, Waclaw (1993). "Crystalline basement of the Polish part of the Baltic Sea". Geological Quarterly. 37 (3): 329–344.
^ abAndersson, U.B.; Sjöström, H.; Högdahl, K. & Eklund, O. (2004). "8. The Transscandinavian Igneous Belt, evolutionary models". In Högdahl, K.; Andersson, U.B. & Eklund, O. (eds.). The Transscandinavian Igneous Belt (TIB) in Sweden: a review of its character and evolution. Geological Survey of Finland, Special Paper 37. pp. 104–112.
transscandinavian, igneous, belt, swedish, transskandinaviska, magmatiska, bältet, abbreviated, major, lithological, units, baltic, shield, consists, series, batholiths, sweden, norway, forming, 1400, long, belt, running, from, lofoten, norway, north, blekinge. The Transscandinavian Igneous Belt Swedish Transskandinaviska magmatiska baltet abbreviated TIB is one of the major lithological units of the Baltic Shield It consists of a series of batholiths in Sweden and Norway forming a ca 1400 km long belt running from Lofoten Norway in the north to Blekinge Sweden in the south The Transscandinavian Igneous Belt and its rocks solidified from magma between 1810 and 1650 million years ago during the Mesoproterozoic The Transscandinavian Igneous Belt was likely formed in an Andean type geological environment implying it was once parallel to a destructive plate boundary 1 The belt was first identified in the 1980s and was referred as the Transscandinavian Granite Porphyry Belt The current name was first applied in 1987 2 Geological map of the Scandinavian Peninsula and Fennoscandia Archean rocks of the Karelia Belomorian and Kola domains Proterozoic rocks of the Karelia and Kola domains Svecofennian Domain Transscandinavian Igneous Belt Timanide Orogen Sveconorwegian Orogen including the Western Gneiss Region Caledonian nappes Contents 1 Extent 2 Chronology 3 Lithology petrology and geochemistry 4 ReferencesExtent EditThe Transscandinavian Igneous Belt occurs as a ca 1400 km long belt running from Lofoten in the north to Blekinge in the south 3 4 The northern parts of the belt are partly covered by Caledonian nappes but crop out in windows e g Rombak Nasafjallet In addition to this some Caledonian nappes are made up of Transscandinavian Igneous Belt rocks 1 Beneath the East European Platform the belt continues across the Baltic Sea to northeast Poland and Kaliningrad Oblast 5 Chronology EditThe plutons of the belt formed variously between 1810 and 1650 million years ago Mya 3 the oldest rocks overlapping in age with the rocks of the Svecofennian orogeny and the youngest overlapping in age with the deformation and metamorphism of the Gothian orogeny 6 Three separate periods of igneous activity are recognised in the Transscandinavian Igneous Belt TIB 1 1813 1766 Mya TIB 2 1723 1691 Mya and TIB 3 1681 1657 Mya This grouping is not perfect as it excludes the youngest units formed 1450 million years ago 4 Hundreds of millions of years after the Transscandinavian Igneous Belt was formed it was subject to the particular deformation tectonics and metamorphism of the Sveconorwegian orogeny about 1100 to 990 million years ago 3 Lithology petrology and geochemistry EditCharacteristically the granites and similar rocks of the Transscandinavian Igneous Belt are rich in alkali elements e g sodium and potassium and have porphyritic textures Not all rocks of the Transcandinavian Igneous Belt have a pure alkaline character some display chemistries tending to the calc alkaline magma series 6 In addition to the above mentioned rocks lesser amounts of mafic intrusives are also part of the belt 2 References Edit a b Lundqvist et al p 163 164 a b Gorbatschev R 2004 1 The Transscandinavian Igneous Belt introduction and background In Hogdahl K Andersson U B amp Eklund O eds The Transscandinavian Igneous Belt TIB in Sweden a review of its character and evolution Geological Survey of Finland Special Paper 37 pp 9 15 a b c Hogdahl K Andersson U B Eklund O 2004 The Transscandinavian Igneous Belt TIB in Sweden a review of its character and evolution abstract Geological Survey of Finland Special Paper 37 a b Lundqvist et al p 165 166 Ryka Waclaw 1993 Crystalline basement of the Polish part of the Baltic Sea Geological Quarterly 37 3 329 344 a b Andersson U B Sjostrom H Hogdahl K amp Eklund O 2004 8 The Transscandinavian Igneous Belt evolutionary models In Hogdahl K Andersson U B amp Eklund O eds The Transscandinavian Igneous Belt TIB in Sweden a review of its character and evolution Geological Survey of Finland Special Paper 37 pp 104 112 Cited book Lundqvist Jan Lundqvist Thomas Lindstrom Maurits Calner Mikael Sivhed Ulf 2011 Transkandinaviska magmatiska baltet Sveriges Geologi Fran urtid till nutid in Swedish 3rd ed Spain Studentlitteratur ISBN 978 91 44 05847 4 Retrieved from https en wikipedia org w index php title Transscandinavian Igneous Belt amp oldid 1063423993, wikipedia, wiki, book, books, library,
