Petrography and Petrology of the KTB Location Schwarzwald

摘要: The metamorphic massif of the Central Schwarzwald has been chosen as a possible site deep continental research drilling. Apart from outstanding results geophysical and geological investigations carried out in that region, petrographic conditions petrological aspects known so far, cause far-reaching expectations materials encountered target area is typical section pre-Variscan basement with pre-dominant paragneisses, orthogneisses, various specialized intercalations. paragneiss complex, Proterozoic age, divided several lithostratigraphic units, which can partly be correlated certain members sequence Bohemia, Numerous geochemical analyses sequences their statistical evaluation are useful means for further distinctions correlations.- A high-pressure phase metamorphism clearly expressed many eclogites accompanying intermediate acid (former supracrustal) rocks. Several narrow belts mylonitic granulites interpreted deep-seated shear zones tectonic event. In Haslach area, granulite zone seems to mark border between gneiss unit HP relics another one where those lacking.- problem raised by tonalitic-trondhjemitic-granodioritic orthogneisses whether they were intrusive (originating lower crust) or subautochthonous formations anatexis environment,- For completion general view, some paragraphs on units north south briefly discussed.