Many site-specific accessory phases occur, e.g. barite that is a common accessory constituent in collected airborne and deposited dust. Barite was not observed in other locations but probably this accessory mineral was overlooked in samples in which only the major dust constituents were examined in detail. This observation may serve as a cautionary note when drawing conclusions on the abundance of collected multi-phase airborne dust assemblages as a function of grain size. The chemical compositions of collected barite particles are close to the ideal barite composition. Discussion Transport of micrometre-sized airborne dust is typically locally or regionally limited with respect to their sources.
Coal burning for domestic purposes is still widespread in the region, especially during winter.
Thus, this activity might be able to concentrate primary barite before it is ejected into the environment. The prevailing winds in this part of Poland are from the west. There is no industrial activity in the village's vicinity. These observations suggest that high-temperature industrial coal burning results in decomposition of primary barite to BaO and SO 2 . The BaO grains thus produced and emitted into the troposphere could have back-reacted with sulfur dioxide and water aerosols to produce secondary barite.