Details zur Publikation
|DOI / URL||Link|
|Titel (primär)||Varve formation in the acidic (pH 2.7) pit lake 111 (Lusatia, Germany)|
|Titel (sekundär)||Mining meets water - conflicts and solutions : proceedings : IMWA 2016 in Leipzig, Germany, July 11-15, 2016. 2., überarbeitete und ergänzte Auflage|
|Autor||Wendt-Potthoff, K.; Scharf, B.W.; Boehrer, B.; Völkner, C.; Tittel, J.; Merkt, J.;|
|Herausgeber||Drebenstedt, C.; Paul, M.;|
|POF III (gesamt)||T31;|
|Keywords||acid pit lake; sediment; varve formation; chrysophyte|
|Abstract||Sediments from the north basin of Lake 111, a small but very well studied lake resulting from lignite mining in Lusatia, show a pronounced fine layering. This layering can be found in several lignite pit lakes, but mechanisms to explain it have not been investigated with respect to the specific hydrology and chemistry of acid pit lakes.
The north basin of Lake 111 is flat-bottomed, dimictic, and bioturbation can be neglected. Physical and chemical characteristics, sedimentation rates and composition of settling material have been monitored over two years and large thin sections of sediment cores were analysed microscopically to identify fine sediment layering as annual.
Total sedimentation rate was highest in winter, partly due to storms, while sedimentation of particulate organic matter showed peaks in May. Sedimentation of chrysophyte cysts occurred mainly in summer and autumn. Regular bands of chrysophyte cysts were detected, and comparison with the documented history of the lake substantiated that the observed lamination formed annually. To the best of our knowledge, this is the first report on varve formation in an extremely acidic lake which is not governed by fumaroles at the lake bottom.
|Wendt-Potthoff, K., Scharf, B.W., Boehrer, B., Völkner, C., Tittel, J., Merkt, J. (2016):
Varve formation in the acidic (pH 2.7) pit lake 111 (Lusatia, Germany)
In: Drebenstedt, C., Paul, M. (eds.)
Mining meets water - conflicts and solutions : proceedings : IMWA 2016 in Leipzig, Germany, July 11-15, 2016. 2., überarbeitete und ergänzte Auflage
TU Bergakademie Freiberg, Freiberg, p. 244 - 250