Abstract
About 300 Tertiary eruptive centers are spread over a region of about 1000 km2 in the Hocheifel Area. The volcanic rock suite reveals alkali basaltic features with strong sodium affinities and consists of primary alkali basalts (olivine basalts, alkali olivine basalts, nepheline basanites, olivine nephelinites) and fractionation products (hawaiites, mugearites, benmoreites, trachytes). Within the Tertiary volcanic field a systematic zoning of the volcanics due to variations of their specific petrology and geochemical parameters is obvious. These parameters project a N-S shaped body on to the surface from within the Upper Mantle which has released primary alkali basaltic melts 46 to 18 Ma ago. The depths of the alkali basalt generation is restricted below a cataclastic deformed but metasomatically altered spinel peridotit’e layer from which fragments record opx - cpx equilibration temperatures of 890° to 1040°C at about 50 km below the surface.
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Huckenholz, HG. (1983). Tertiary Volcanism of the Hocheifel Area. In: Fuchs, K., von Gehlen, K., Mälzer, H., Murawski, H., Semmel, A. (eds) Plateau Uplift. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-69219-2_16
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DOI: https://doi.org/10.1007/978-3-642-69219-2_16
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