Institution
Geological Survey of Sweden
Government•Uppsala, Sweden•
About: Geological Survey of Sweden is a government organization based out in Uppsala, Sweden. It is known for research contribution in the topics: Metamorphism & Zircon. The organization has 316 authors who have published 671 publications receiving 18333 citations. The organization is also known as: Sveriges Geologiska Undersökning.
Topics: Metamorphism, Zircon, Bedrock, Ice sheet, Glacial period
Papers published on a yearly basis
Papers
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TL;DR: In this paper, the trace element contents in soils formed in sulphidic and non-sulphidic clays were compared, and the results showed that the total contents of Cd, Ni, Mn, Co, Zn, and to some extent Cd and Ni are not higher than in non sulfide-free clays from adjacent areas.
97 citations
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TL;DR: There were no clear signs of nephrotoxicity from uranium in drinking water at levels recorded in this study, but some indications of an effect were observed using uranium in urine as a measure of overall uranium exposure, and the clinical relevance of these findings remains unclear.
96 citations
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TL;DR: The Mylonite Zone (MZ) as discussed by the authors is a major, ductile deformation zone in the Sveconorwegian orogen (Baltic Shield) of southwestern Sweden and southeastern Norway.
95 citations
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TL;DR: In this paper, it was shown that the Eastern Segment of the Sveconorwegian orogen contains tectonically reworked TIB rocks and that there is no major lithological discontinuity either across the Scecorwegian Frontal Deformation Zone or within the eastern Segment.
94 citations
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TL;DR: In this article, the ages of migmatization in the polymetamorphic, parautochthonous basement of the Sveconorwegian Province, Sweden, have been determined using U-Pb ion probe analysis of zircon domains that formed in leucosome of migmaticitic orthogneisses.
Abstract: Absolute ages of migmatization in the polymetamorphic, parautochthonous basement of the Sveconorwegian Province, Sweden, have been determined using U–Pb ion probe analysis of zircon domains that formed in leucosome of migmatitic orthogneisses. Migmatite zircon was formed by recrystallization whereas dissolution–reprecipitation and neocrystallization were subordinate. The recrystallized migmatite zircon was identified by comparison of zircon in mesosomes and leucosomes. It is backscatter electron-bright, U-rich (800–4400 ppm) with low Th/U-ratios (generally 0.01–0.1), unzoned or ‘oscillatory ghost zoned’, and occurs as up to 100 μm-thick rims with transitional contacts to cores of protolith zircon. Protolith ages of 1686 ± 12 and 1668 ± 11 Ma were obtained from moderately resorbed, igneous zircon crystals (generally Th/U = 0.5–1.5, U < 300 ppm) in mesosomes; protolith zircon is also present as resorbed cores in the leucosomes. Linkage of folding, synchronous migmatization and formation of recrystallized zircon rims allowed direct dating of south-vergent folding at 976 ± 7 Ma. At a second locality, similar recrystallized zircon rims in leucosome date pre-Sveconorwegian migmatization at 1425 ± 7 Ma; an upper age bracket of 1394 ± 12 Ma for two overprinting phases of deformation (upright folding along gently SSW-plunging axes and stretching in ESE) was set by zircon in a folded metagranitic dyke. Lower age brackets for these events were set at 952 ± 7 and 946 ± 8 Ma by zircon in two crosscutting and undeformed granite–pegmatite dykes. Together with previously published data the present results demonstrate: (i) Tectonometamorphic reworking during the Hallandian orogenesis at 1.44–1.42 Ga, resulting in migmatization and formation of a coarse gneissic layering. (ii) Sveconorwegian continent–continent collision at 0.98–0.96 Ga, involving (a) emplacement of an eclogite unit, (b) regional high-pressure granulite facies metamorphism, (c) southvergent folding, subhorizontal, east–west stretching and migmatization, all of which caused overprint or transposition of older Mesoproterozoic and Sveconorwegian structures. The Sveconorwegian migmatization and folding took place during or shortly after the emplacement of Sveconorwegian eclogite and is interpreted as a result of north–south shortening, synchronous with east–west extension and unroofing during late stages of the continent–continent collision.
94 citations
Authors
Showing all 316 results
Name | H-index | Papers | Citations |
---|---|---|---|
David G. Gee | 40 | 128 | 5688 |
Stefan Bergman | 31 | 166 | 5801 |
Frank T. Manheim | 30 | 85 | 3263 |
Laust B. Pedersen | 30 | 123 | 3193 |
Karna Lidmar-Bergström | 27 | 40 | 2007 |
Eva-Lena Tullborg | 26 | 82 | 1756 |
Stefan Lüth | 25 | 93 | 1925 |
Charlotte Möller | 25 | 62 | 2106 |
Pär Weihed | 25 | 102 | 2119 |
Ingemar Cato | 21 | 27 | 1264 |
Michael B. Stephens | 21 | 67 | 1652 |
Lovisa Zillén | 20 | 26 | 2182 |
Mehrdad Bastani | 20 | 65 | 1036 |
Martiya Sadeghi | 20 | 54 | 1387 |
Jenny Andersson | 18 | 37 | 1198 |