Über die Feldspäte im Germanischen Buntsandstein,ihre Korngrößenabhängigkeit Verbreitung und paläogeographische Bedeutung |
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| Authors: | Prof Dr Dieter Heim |
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| Institution: | 1. Geologisches Institut der Universit?t Mainz, Saarstr. 21, 65 Mainz
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| Abstract: | The feldspars of the Buntsandstein, their postdepositional alterations, dependance of grain size, their regional distribution and palaeogeographic significance were investigated. The work was based on X-Ray, optical and chemical investigations of about 1100 samples from the Buntsandstein areas in Western Germany and the Vosges. By statistical means feldspar portions independent from grain size were calculated and four different sedimentstreams were identified. The relation of these streams to stratigraphic units is discussed. One stream originated from the south-western margins of the basin, it is very poor in plagioklase and it reached most likely northern Hessen during Lower and Upper Buntsandstein time. During the Middle Buntsandstein it reached the centre of the Weser Basin in southern Niedersachsen. It was ?oppressed“ at its southeastern and eastern flankes by sediment streams originating from the Bohemian Massif. They are characterised by a different granulation, by different feldspar content, and by increasing plagioklase content. In northern Hessen and southern Niedersachsen they reached the western flank of the Weser Basin. During the Middle Buntsandstein this basin had partly been an interference area of S-N and SE-NW sediment flows. |
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