Das Altpaläozoikum und Unterkarbon des Gurktaler Deckensystems (Ostalpen) und ihre paläogeographischen Beziehungen |
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| Authors: | Dr F Neubauer Dr J Pistotnik |
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| Institution: | (1) Present address: Institut und Museum für Geologie und Paläontologie der Universität Tübingen, Sigwartstraße 10, D-7400 Tübingen;(2) Present address: Geologische Bundesanstalt, Rasumofskygasse 23, A-1031 Wien |
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| Abstract: | The Paleozoic sequences of the Gurktal nappe (Eastern Alps) can be divided into two tectonic units by means their facies development: (1) The lower Murau nappe is characterized by low grade metamorphic black schists, calcareous phyllites of predominantly Silurian age (?) and some hundred meters of carbonates of predominantly Lower Devonian age. (2) The higher Stolzalpe nappe, metamorphosed very low to low grade, contains Ordovician to Lower Silurian volcanic formations. There can be recognized three facies during Upper Silurian to Lower Devonian times. The higher Devonian to Lower Carboniferous is dominated by more or less pelagic carbonates. After the facies distribution of Paleozoic rocks other parts of southern Austroalpine show a similar tectonic feature. The Stolzalpe nappe is related to the upper nappes of Austroalpine (i. e. Noric nappe system, northern parts of Paleozoic of Graz) and also western Carnics. The clastic and carbonate complexes of Murau nappe, Schöckel nappe s. 1. (Paleozoic of Graz) and Murides crystalline (middle Austroalpine) are developed very similar. Some features of Paleozoic fades distribution show a NE to SW trend crossing the alpidic structure. Because of conglomerates with crystalline components near the base is postulated a preUpper Ordovician basement complex for this realm. |
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