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Zeolites in Tertiary basaltoids from Rębiszów (Lower Silesia, SW Poland)

Adamczyk Z.

Archiwum Mineralogiczne

2001

T. 54

23-32

Several minerals from zeolite group have been found in Rębiszów basaltoid deposits: gobbinsite, natrolite, gismondine, garronite, thomsonite and phillipsite. For the first time gobbinsite has been recognized in basaltoids from Lower Silesia. Moreover, a new phase has been distinguished on the basis of some determined parameters (such as calculation of chemical formulae and X-ray diffraction patterns), belonging to zeolite group and occurring together with other zeolites. Origin of the whole assemblage of zeolite minerals can be related to hydrothermal activity of post-magmatic solutions within thermal contraction cracks of congealing basaltoid lava.