Mineralization related to the Devonian crustal extension and volcanosedimentary processes in the Silesian domain, northeastern Bohemian Massif

The traditional annual field trip (October 3-5, 2014) of our chapter has mainly focused on stratiform iron mineralization in the Neoproterozoic metasediments of the Děsná unit and iron mineralization of the Lahn-Dill type in the Devonian volcanosedimentary cover in the Jeseníky Mts., northeastern Bohemian Massif.

The main part of the excursion was designed as a transsect across the metamorphic and deformation gradient imposed on the same iron-bearing precursor of the Lahn-Dill type. We have thus investigated transition from jaspilites to metamorphosed magnetite ores as well as their banded magnetite-quartz counterparts. This provided many interesting examples, based on a number of small historically mined occurrences.

The 13 students participated in this 3-days excursion, which was led by David Dolejs.

SGA News no. 36 page 17