Weathering of sandstones studied from the composition of stream sediments of the Kupa River (Croatia)

Author: Bilinski, H.

Source: Mineralogical Magazine, Volume 72, Number 1, February 2008 , pp. 23-26(4)

Publisher: Mineralogical Society

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Abstract:

Elemental compositions of the <2mm fraction of three sediments sampled along the Kupa River are presented. On plots of log(SiO₂/Al₂O₃) vs. log(CaO+Na₂O)/K₂O, the sediments plot closest to average sandstone compositions. On plots of weathering indices A vs. B (Kronberg and Nesbitt, 1981) the sediments plot close to basalt, terrestrial crust and granite. X-ray diffraction of the <63 μm fraction suggests chlorite, vermiculite and mica are present as weathering products in the upper, middle and lower stream sediments. Depletion of some elements in the sediments suggests loss of elements from the sediments due to dissolution of minerals.

Keywords: WEATHERING; SANDSTONES; STREAM SEDIMENTS; MODERATE CLIMATE; KUPA RIVER; CROATIA

Document Type: Research article

DOI: 10.1180/minmag.2008.072.1.23

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