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- W1971170464 abstract "Deep erosional level, rich exposure and excellent preservation of parts of the passive margin make the Arctic Scandinavian Caledonides (north of 66°N) an ideal area for attempting a reconstruction of the pre-collisional continental margin of a collisional mountain belt. Such a reconstruction is essential for the safe identification of suspect and exotic terranes, but also because “passive” margins seem to partly control tectonics and metamorphism throughout the evolution of mountain belts. The palinspastic reconstruction of the Baltoscandian Margin attempted in this paper suggests that all thrust sheets in the Arctic Scandinavian Caledonides below the nappes of ensimatic affinity could derive from a northern extension of the Caledonide foreland of southwestern Scandinavia. Thus, the paper calls in question recent interpretations of principal units of the Arctic Scandinavian Caledonides (e.g., the Kalak Nappe Complex, including the Sørøy Group type stratigraphy) as exotic terranes, and the sedimentary detritus of the Sørøy Group as foreign to the Baltoscandian Margin. The varied evidence of magmatism of rift affinity found in many nappes and in the southern foreland is reviewed and interpreted in terms of a coherent, though protracted evolution from the ca. 900 Ma, high-Ti-K-P-LREE continental tholeiites of the foreland aulacogen to the ca. 580 Ma T-MORB sheeted dykes of the outermost continental margin. This evolution is compared to that of modern rifts (Afro-Arabian rift system); such comparison allows interpretation of the renowned Seiland Igneous Province as magmatism in a mid-crustal section of the Baltoscandian Margin. The evidence of a strong MORB affinity of mafic dykes occurring in most thrust sheets below the exotic terranes requires extensive thinning of a wide zone of the continental margin prior to the ultimate break-up. The paper summarizes unambiguous evidence that the rifted and dyke-intruded margin was depressed to at least 50 km depth and imbricated and uplifted in Late Cambrian-Early Ordovician times, and the concept of a Finnmarkian event is retained for this early diastrophism affecting the Baltoscandian Margin. A remarkable feature of the Arctic Scandinavian Caledonides is the evidence that the sheeted-dyke complex must have been detached from the diving margin at an early stage and carried towards the foreland, thus escaping high-pressure metamorphism at 505-500 Ma. Finnmarkian cooling ages of thrusts within the Seve Nappe Complex are in conflict with popular flat-ramp models of Silurian-Early Devonian (Scandian) thrusting developed for this nappe complex. Rich evidence of metamorphic and isotopic disequilibrium in the nappe stack of the Arctic Scandinavian Caledonides suggests that the perturbations of the geotherm caused by early understacking of cold continental crust never recovered before renewed crustal thickening during Scandian accretion of exotic terranes and final assembly of the mountain belt. This raises questions about the actual significance of results obtained by P-T-t modelling in other overthrust belts, where such evidence is not preserved." @default.
- W1971170464 created "2016-06-24" @default.
- W1971170464 creator A5039421998 @default.
- W1971170464 date "1994-03-01" @default.
- W1971170464 modified "2023-10-13" @default.
- W1971170464 title "The Baltoscandian margin in neoproterozoic-early palaeozoic times. Some constraints on terrane derivation and accretion in the Arctic Scandinavian Caledonides" @default.
- W1971170464 cites W1498670017 @default.
- W1971170464 cites W1967229792 @default.
- W1971170464 cites W1968434699 @default.
- W1971170464 cites W1969651898 @default.
- W1971170464 cites W1970355765 @default.
- W1971170464 cites W1974472927 @default.
- W1971170464 cites W1976639874 @default.
- W1971170464 cites W1979270399 @default.
- W1971170464 cites W1980551284 @default.
- W1971170464 cites W1983353925 @default.
- W1971170464 cites W1985467080 @default.
- W1971170464 cites W1985868326 @default.
- W1971170464 cites W1987877047 @default.
- W1971170464 cites W1992860983 @default.
- W1971170464 cites W1994061046 @default.
- W1971170464 cites W1994621633 @default.
- W1971170464 cites W1998316783 @default.
- W1971170464 cites W2000098699 @default.
- W1971170464 cites W2001554487 @default.
- W1971170464 cites W2002535631 @default.
- W1971170464 cites W2003096778 @default.
- W1971170464 cites W2005868942 @default.
- W1971170464 cites W2005978177 @default.
- W1971170464 cites W2006856817 @default.
- W1971170464 cites W2009775502 @default.
- W1971170464 cites W2010581269 @default.
- W1971170464 cites W2017911323 @default.
- W1971170464 cites W2018900974 @default.
- W1971170464 cites W2019642087 @default.
- W1971170464 cites W2022160251 @default.
- W1971170464 cites W2025010591 @default.
- W1971170464 cites W2025104348 @default.
- W1971170464 cites W2025173631 @default.
- W1971170464 cites W2025858964 @default.
- W1971170464 cites W2029025938 @default.
- W1971170464 cites W2029105679 @default.
- W1971170464 cites W2029759780 @default.
- W1971170464 cites W2032669613 @default.
- W1971170464 cites W2034797292 @default.
- W1971170464 cites W2035284349 @default.
- W1971170464 cites W2035680299 @default.
- W1971170464 cites W2042724439 @default.
- W1971170464 cites W2049422938 @default.
- W1971170464 cites W2050060929 @default.
- W1971170464 cites W2050436802 @default.
- W1971170464 cites W2052968238 @default.
- W1971170464 cites W2052970416 @default.
- W1971170464 cites W2055731372 @default.
- W1971170464 cites W2057175164 @default.
- W1971170464 cites W2057660604 @default.
- W1971170464 cites W2058841017 @default.
- W1971170464 cites W2067617266 @default.
- W1971170464 cites W2067941228 @default.
- W1971170464 cites W2071872510 @default.
- W1971170464 cites W2073965183 @default.
- W1971170464 cites W2080340405 @default.
- W1971170464 cites W2080584339 @default.
- W1971170464 cites W2081215513 @default.
- W1971170464 cites W2081357022 @default.
- W1971170464 cites W2083939313 @default.
- W1971170464 cites W2089440373 @default.
- W1971170464 cites W2091436472 @default.
- W1971170464 cites W2091746531 @default.
- W1971170464 cites W2094414093 @default.
- W1971170464 cites W2094828235 @default.
- W1971170464 cites W2094990986 @default.
- W1971170464 cites W2096369754 @default.
- W1971170464 cites W2099979859 @default.
- W1971170464 cites W2102909694 @default.
- W1971170464 cites W2111466253 @default.
- W1971170464 cites W2117452387 @default.
- W1971170464 cites W2120006754 @default.
- W1971170464 cites W2120836288 @default.
- W1971170464 cites W2125346128 @default.
- W1971170464 cites W2128354436 @default.
- W1971170464 cites W2130248699 @default.
- W1971170464 cites W2133316941 @default.
- W1971170464 cites W2135744922 @default.
- W1971170464 cites W2136124340 @default.
- W1971170464 cites W2139925916 @default.
- W1971170464 cites W2142243741 @default.
- W1971170464 cites W2146069364 @default.
- W1971170464 cites W2146296153 @default.
- W1971170464 cites W2146818194 @default.
- W1971170464 cites W2149445308 @default.
- W1971170464 cites W2151840802 @default.
- W1971170464 cites W2157672263 @default.
- W1971170464 cites W2158224934 @default.
- W1971170464 cites W2160687242 @default.
- W1971170464 cites W2168019912 @default.
- W1971170464 cites W2316214065 @default.
- W1971170464 cites W2317096966 @default.