Abstract
Pegmatites are representatives of a unique lithology, in view of their mega-crystals and colorful minerals spread across in the felsic groundmass, but on the other hand they are not unique in terms of the lithological processes, involving magmatic, metamorphic, hydrothermal and sedimentary processes, if by common consensus we accept weathering and denudation as part of the sedimentary processes. Metapegmatites are restricted to the allochthonous units of the ensialic orogen. A transitional facies with an extraordinary concentration of Nb-Ta together with Be can be correlated with two crustal highs of a high-velocity zone indicating a lower crustal thermal high underneath. Unlike the metapegmatites, which are pre-kinematic, the younger pegmatitic mobilizates, called pegmatoids, were emplaced late kinematically with only minor or no textural adjustment to the stress-strain relations in the NE Bavarian basement rocks. One can find this type of felsic mobilizates in the allochthonous units. The built-up, alteration and destruction of pegmatites and aplites in the HPPP is a complex process.
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