%0 Journal Article
%@ 0365-8066
%A  Molnár Sándor
%C Szeged
%D 1996
%F acta:24835
%I University of Szeged, Department of Mineralogy, Geochemistry and Petrology
%J Acta mineralogica-petrographica
%K Kőzettan, Ásványtan, Földtan, Geokémia
%P 83-87
%T Geochemical investigations of pyroxenes from Lower Cretaceous volcanics from boreholes of the Great Hungarian Plain
%U http://acta.bibl.u-szeged.hu/24835/
%V 37
%X Originally the lower cretaceous volcanics known from boreholes of the Great Hungarian Plain proved to be feldspar-rich basaltic rocks. They are highly altered volcanics (Mg-metasomatism, spilitisation, weathering), and they contain as fresh component parts some grains of clinopyroxene. From electronmicroprobe analysis-data of the minerals is shown, that the pyroxenes are of diopside-salit-augite composition. It can be stated, that the analised grains refer to alcali magma, therefore the high alcalic content in the rocks is a result not only of metasomatism and contamination. The pyroxene analitical data supported the conccption of rock-origin, that they are products of continental within-plate volcanism.
%Z Bibliogr.: 87. p. ; ill. ; összefoglalás angol nyelven