Solid inclusions

Loose group of whitish guest crystals (F-apatite, K-Feldspar and calcites)

Most abundant in samples from source A - in the order of their frequency are colourless calcite as rhombohedral or rounded, resorbed crystals with many faces and twin planes; hexagonal, more or less well shaped prisms of colourless apatite ; red-brown flakes of phlogopite, yellowish tablets of feldspar and black grains of 'thorianite-uraninite' with tension haloes . In contrast to source A, the most abundant mineral inclusion in the samples from source C is green spinel.

In the following section some new findingss about the properties of the inclusions which were obtained by SEM-analyses, will be discussed. Some different types of Na-Ca-K-silicates were present, which could not be identified definitely by means of SEM-analyses (scapolite versus feldspars). To arrive at a definite identification, further XRD-analyses are required. Positive identification is possible for meionite inclusions by combined SEM-analyses and acid testing.