New approach to garnet redistribution during aeolian transport

Authors

  • Lenka Lisá Institute of Geology, Academy of Sciences of the Czech Republic, Rozvojová 135, 165 02 Prague 6, Czech Republic
  • David Buriánek Czech Geological Survey, Leitnerova 2, Brno 602 00, Czech Republic
  • Pavel Uher Department of Mineral Deposits, Comenius University, Mlynská dolina, 842 15 Bratislava, Slovakia

Keywords:

Weichselian, Pleistocene, Czech Republic, aeolian sediments, garnet composition, provenance

Abstract

Garnet composition within Late Pleistocene (Weichselian) loess and loess-like deposits was studied in 13 samples of sediment heavy mineral fractions from Moravia and Silesia (Czech Republic). Four areas differing in garnet chemistry were identified, and some regional trends in garnet composition changes were documented. The data obtained support the generally accepted conclusion of prevailing westerly winds during Weichselian loess deposition. Metamorphic rocks of the Bohemian Massif together with contributions from igneous (mainly granitic) and sedimentary rocks were indicated as a source for the Weichselian loess and loess-like deposits studied. Local differences in garnet composition depend on the basement source rocks, on prevailing wind direction, on regional geomorphology and on transport distance.

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Published

2010-03-27

Issue

Vol. 53 No. 3 (2009)

Section

Articles

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