Acta Musei Moraviae

Relations of the muscovite pegmatites to the geophysical fields in the area of the Hrubý Jeseník Mts., Czechoslovakia

Relations between occurrences of the muscovite pegmatites (beryl-columbite subtype) and geophysical fields in the area of the Hrubý Jeseník Mts. have been discussed. The large negative gravity anomaly situated in the area of the Keprník dome and probably connected with the Žulová massif is locally rimmed by small granitoid bodies (biotite granodiorite to leucocratic muscovite granite) and related pegmatite groups especially along the expressive gravity gradient. On the basis of these observations the existence of the large Silesicum granitoid pluton, forming a basement of the western part of the Hrubý Jeseník Mts. And manifested on the land surface by the Žulová and Šumperk massifs, small granitoid bodies and pegmatites is assumed.