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Quantification of weathering depths in slightly weathered tuffs
Date
2002-09-01
Author
Topal, Tamer
Metadata
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Slightly weathered white and pink tuffs of Midas monument have deterioration problems. In this study, depths of the weathering zones developed in the tuffs are investigated through optical microscopy, XRD, chemical analyses, SEM and some index parameters. By examining quantitative weathering indices and comparing them with thin section studies, it is found that thin section analyses of the phenocrysts; LoI and WPI are good indicators to quantify the depth of weathering for the tuffs. However, thin section studies have limited value for fine-grained tuffaceous matrix: The chemical weathering of the tuffs produces weathered zones that are 4.5 cm thick within the white tuff and 2.5 cm thick within the pink tuff. Physical weathering causes fracturing of feldspars along their cleavage planes. Variations of the index properties of the tuffs caused by weathering are not significant enough to quantify the weathering depths in the tuffs.
Subject Keywords
General Engineering
,
Earth and Planetary Sciences (miscellaneous)
,
Soil Science
,
General Earth and Planetary Sciences
,
Pollution
,
General Environmental Science
,
Water Science and Technology
,
Environmental Chemistry
URI
https://hdl.handle.net/11511/35226
Journal
ENVIRONMENTAL GEOLOGY
DOI
https://doi.org/10.1007/s00254-002-0566-3
Collections
Department of Geological Engineering, Article