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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of metamorphic geology 10 (1992), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: The Velay dome (French Massif Central) offers a quasi-continuous section across an anatectic domain comprising low- to high-grade schists, gneisses and granites. Two main tectonometamorphic events, and their related generation of granitic material, were recognized in addition to a major Barrrovian tangential event (D2) attributed to intracontinental collision tectonics: (i) a medium- to low-P, high-T event (D3) which gave rise to migmatites and syntectonic monzonitic granites and granodiorites, and (ii) a widespread melting event (D4) which led to the generation of migmatities, the Velay granite and post-anatectic granites.Thermobarometry on samples collected from both the metamorphic envelope and the granitic core distinguishes two distinct geotherms: (i) a first, associated with the D3 event, characterized by P 〉 5 kbar, T≤ 750° C and water-present melting (biotite remains stable) which led to large-scale migmatization but minor amount of granites; (ii) a second, associated with the D4 event and characterized by vapour-absent melting (P= 4–5 kbar, T= 760–850° C) which gave rise to the Velay granites and late-migmatitic granites. The temperature increase during the D4 event is attributed to the intrusion of hot mafic magmas within the crust.The time-integrated features of the different granitic rocks in the Velay dome can be directly related to aH2O in the source region and illustrate the progressive dehydration of a middle to lower crustal segment over 60 Ma.
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of metamorphic geology 6 (1988), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Abstract Retrograde and prograde mineral assemblages from metapelitic and metabasic rocks of the Iforas Granulitic Unit (Mali) were generated by the superimposition of two granulite facies metamorphic events. They clearly result from a polycyclic evolution and can be related to a late Eburnean unroofing followed by a Pan-African burial.Thermobarometry on Pan-African garnet-bearing assemblages yields (P, T) estimates of 620±50°C and 5± Ikbar. The nearly anhydrous conditions produced in the Eburnean appear to be the direct cause of the unusually lowtemperature granulite-facies metamorphism in the Pan-African. These P, T estimates are compared with those obtained on the underlying unit (Kidal Assemblage) upon which the Iforas Granulitic Unit was thrust. A P-T-t path, during the Pan-African orogeny, is proposed and discussed for both the Iforas Granulites and Kidal Assemblage.
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/General Subjects 1074 (1991), S. 424-432 
    ISSN: 0304-4165
    Keywords: (Sertoli cell) ; Hydrophobic proteoheparan ; Proteoglycans
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Steroid Biochemistry 35 (1990), S. 307-311 
    ISSN: 0022-4731
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Steroid Biochemistry 19 (1983), S. 101 
    ISSN: 0022-4731
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
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  • 6
    ISSN: 1437-3262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Abstract The Archean crust of Lapland (Fennoscandia) consists of four units (from north to south): (1) the Inarijärvi nucleus, old basement complex of gneisses and greenstones, (2) the granulite belt, thick terrigenous metasedimentary sequence intruded by small amounts of calc-alkaline plutonic rocks, (3) the Tana River belt composed of tholeiitic metavolcanics, and (4) a set of gneiss domes fringed with younger greenstone belts. The main feature of their metamorphic and tectonic evolution are described. Geodynamic models applied to the Archean are discussed and a crustal evolutionary model suitable for this region is proposed. We assume that the Tana River and granulite belts represent a suture between an older domain in the north (craton of Kola Peninsula) and the northern part of the Archean basement of Central Finland.
    Abstract: Résumé La croûte archéenne de Laponie (Fennoscandie) comprend quatre unités principales. Ce sont du Nord au Sud: (1) le nucleus de l'Inarijärvi, formé par un vieux socle complexe avec des gneiss et des roches vertes, (2) la ceinture granulitique, à l'origine formée par une épaisse séquence sédimentaire térrigène et par des intrusions calcoalcalines, (3) la ceinture de la Tana River composée de métavolcanites tholéitiques et, (4) un ensemble de dÔmes de gneiss flanqués de jeunes ceintures de roches vertes. Les grands traits de l'évolution tectonométamorphique de cet ensemble sont décrits. Les modèles géodynamiques archéens classiques sont discutés et un modèle d'évolution crustale pour cette région est proposé. Nous pensons que la ceinture de la Tana River et celle des granulites représentent une suture entre un domaine ancien au Nord (craton de la Péninsule de Kola) et la partie septentrionale du socle archéen de Finlande centrale.
    Notes: Zusammenfassung Die archaische Kruste von Lapland (Fennoscandia) besteht von Nord nach Süd aus vier Einheiten: (1) der Inarijärvi-Kern, ein alter Grundgebirgskomplex mit Gneisen und Grünschiefem; (2) der Granulit-Gürtel mit mächtigen terrigenen Metasedimenten, in die kleine Kalkalkaliplutone intrudierten; (3) der Tana-Gürtel, der aus tholeiitischen Metavulkaniten besteht; (4) eine Gruppe von Gneisdomen, die von jüngeren Grünschieferzonen umgeben werden. Wir nehmen an, daß der Tana-Gürtel und der Granulit-Gürtel eine Sutur zwischen einem älteren Kern im Norden (Kola-Kraton) und dem nördlichen Teil des archaischen Grundgebirges von Zentralfinnland bildet.
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  • 7
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Analytical Biochemistry 167 (1987), S. 167-173 
    ISSN: 0003-2697
    Keywords: androgen-binding protein ; binding assays ; binding proteins ; chromatography ; proteins
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Contributions to mineralogy and petrology 92 (1986), S. 481-491 
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The Baume migmatites arose from melting of a high-grade metamorphic sequence comprising quartzofeld-spathic and biotite-plagioclase gneisses. Geochemical data and REE modelling suggest that melting occurred under open-system conditions and was caused mainly either by the infiltration along shears of an alkali-rich (K, Rb) aqueous fluid phase or by the injection along foliation planes of granitic magma; some leucosomes result from mixing between in situ partial melts and externally derived granitic materials. Melting appears to be almost independent of the paleosome composition but rather is dependent on the amount of introduced material, itself controlled by the metamorphic fabrics of parent gneisses and/or tectonic structures.
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  • 9
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The St. Malo migmatitic dome represents an interesting example wherein migmatites arise from the anatexis of the surrounding gneisses. Petrographical and chemical data suggest that leucosome compositions are compatible with partial melting of the quartzo-feldsphathic fraction of the parent gneiss. The contribution of the incongruent melting of biotite to the melt does not exceed 5% of the parent rock. Petrogenetic modelling based on experimental data and assuming non modal batch melting show that the K, Rb, Ca, Sr, U and Th chemical patterns of these migmatites result in fact from the interaction of several mechanisms, namely: equilibrium partial melting, mixing between melts and refractory minerals (biotite and accessories), melt removal and late hydrothermal alteration. Zr, Y and Th which are mostly hosted in accessory minerals are significantly withheld from the melts and remain stored in melanosomes (metatexites) except when leucosomes are affected by mixing (diatexites). U is frequently enriched in the leucosomes as well as in some melanosomes suggesting external supply.
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Contributions to mineralogy and petrology 81 (1982), S. 304-316 
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The LILE geochemical patterns of the three main lithological units (graywacke-shale metasedimentary sequence, tholeiitic metaigneous rocks and migmatitic rocks) of the Lapland Granulite belt are described. K, Ba, Sr and Th concentrations in metasediments are nearly similar to average continental crust, whereas Rb and U are unevenly impoverished. In particular graphitic metashales and calcsilicate rocks are not significantly depleted in uranium. Tholeiitic metaigneous rocks comprises metavolcanics which present K/Rb ratios similar to metasediments, and metaplutonics with LILE abundances close to those of the low-K-tholeiites. Migmatites show wide range in LILE content. Metatexites and diatexites have higher K, Rb, Th and U concentrations and similar K/Rb ratios with respect to equivalent unmobilized rocks. Potassic pegmatoïds are strongly enriched K, Rb, Ba and Th but moderately in Sr and U. Plagioclasic pegmatoids and ferromagnesian restites are rich in Sr and poor in other LIL elements. A comparative review of the LILE geochemistry between Lapland granulites and equivalent lithological units taken from non metamorphosed to high grade terrains suggest that fractionation processes are not systematic but controlled by original lithology and mineralogy, mineral — fluid equilibria during progressive (or retrogressive) metamorphism and mineral-melt-fluid equilibria during anatexis. Moreover, statistical analysis on K-Rb distribution patterns in these various rock types shows that there is no metamorphic trend characteristic of granulite facies terrains as previously suggested.
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