The results of 63 new radiometric K-Ar and Rb-Sr measurements on metamorphic minerals from the internal units of the Western Alps show Hercynian, Permian, as well as three Alpine age groups. The first of the Alpine ages cover the period between 78 and m. The second group comprises K-Ar 39 to 50 m. The final group includes 15 to 30 m. It is not yet clear which geologic processes have led to this isotope re-equilibration. Large amounts of inherited argon have been found in Alpine metamorphic minerals of the basement rocks. This is a preview of subscription content, log in via an institution to check access. Rent this article via DeepDyve. Institutional subscriptions. Baggio, Ar dating. Google Scholar. Bearth, P. Bocquet, J. Grenoble 4253—75 Eclogae geol. Chemistry and physical characters. Explanatory text to the metamorphic map of Europe, sheet Alps. Leiden, Unesco, Paris in press. Compte rendu du colloque de la Soc. Alpine 50in press. Bortolami, G. Torino e alcune considerazioni sull' evoluzione paleografica e strutturale della eugeosinclinale piemontese. Milano 18— Chadwick, B. Zermatt-Saas Fee, Southwest Switzerland. Chauveau, J. Dal iaz, G. Dal Piaz, G. Debelmas, J. Earth Sci. Dewey, J. Ellenberger, F. Ernst, W. Foster, M. Frey, Ar dating.
Programmierkenntnisse sind hier sehr von Vorteil, da das Programm von der Logik her genau so aufgebaut ist wie Algorithmen. Geochronologische Erfassungen von retrograden Prozessen in Gesteinen der KTB Vorbohrung mit Hilfe der K-Ar-Methode. ESP, Prix: Für sie muss die Probe nicht in zwei, womöglich nicht repräsentative Hälften geteilt werden, um Argon und Kalium separat zu bestimmen. Sorry, a shareable link is not currently available for this article. Institutional subscriptions.
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K–Ar dating of magmatic sericite crystallites for determination of cooling paths of metamorphic overprints Liewig, Rb–Sr and K–Ar dating of clay. Fred Jourdan: Advances in 40Ar/39Ar dating - from archaeology to planetary sciences. The Geological Society, London , ISBN K-Ar dates on authigenic white micas (illites) and hydrothermally altered detrital micas point to the occurrence of two major episodes of fluid migration. [1] Ar-Ar dating of basalt flows capping terrace deposits of the River Euphrates in northern Syria has provided a new quantitative chronology for the late.Rights and permissions Reprints and permissions. The extensive alteration along the entire fault system occurred about Ma ago during the Jurassic. Die Kalium-Argon-Datierung ist ein geochronologisches Verfahren zur radiometrischen Altersbestimmung von Gesteinen , bei dem der radioaktive Zerfall von Kalium 40 K zu Argon 40 Ar ausgewertet wird. Hey, M. Vialette, Y. Steiger RH, Jager E Convention on the use of decay constants in geo- and cosmochronology. Neues Jahrbuch für Mineralogie - Monatshefte Jg. The results show the K-Ar systems of the amphiboles to be closed in the course of Hercynian HT-metamorphism. Raguin, E. Ziel war es am Ende des Semesters, aus einer Idee einen Prototypen in AR zu gestalten. Paris , — Google Scholar Raumer, J. Alpine 50 , in press. Sawatzki, G. Impressum Kontakt Datenschutz Barrierefreiheit. Rent this article via DeepDyve. Incom ist die Kommunikations-Plattform der Fachhochschule Potsdam mehr erfahren. The amphibole age data show that the Schwarzwald basement does not hold a special position within the European Hercynian belt, but has experienced an evolution similar to other Moldanubian crystalline units where essential orogenic phases are also known to be of Late-Devonian to Early-Carboniferous age. Die Meisten sind noch sehr rudimentär. Hunziker JC, Frey M, Clauer N, Dallmeyer RD, Friedrichsen H, Flehmig W, Hochstrasser K, Roggwiler P, Schwander H The evolution of illite to muscovite: Mineralogical and isotopic data from the Glarus Alps, Switzerland. Show menu Hide menu. Fortschr Mineral 87— Google Scholar Gehlen K von Ore and mineral deposits of the Schwarzwald. Springer, Berlin, Heidelberg, New York, pp — Triassic evolution of the western Neotethys: constraints from microfabrics and U—Pb detrital zircon ages of the Plattenkalk Unit External Hellenides, Greece Article 23 September Historisches [ Bearbeiten Quelltext bearbeiten ]. About this article Cite this article Brockamp, O. Search Search by keyword or author Search. Die zeitliche Entwicklung der Häufigkeiten wird durch das radioaktive Zerfallsgesetz bestimmt. C R Acad Sci Paris — Navigation Find a journal Publish with us Track your research. Institutional subscriptions. Ncube AN, Horn E, Amstutz G The fluorite deposit Käfersteige in the Buntsandstein near Pforzheim, Black Forest. Throughout the crystalline basement of the Schwarzwald mountain range, SW Germany, amphibolites and gabbroic metabasites occur as small basic rock bodies.
