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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Origin of Surface Pits on Quartz as Revealed by Scanning Electron Microscopy
V. Subramanian
ABSTRACT
Optically clear quartz crystals in the range of 20 µm-63 µm in diameter were etched in the laboratory and the surfaces were studied under a Scanning Electron Microscope. The photographs show a wide range of surface features. Naturally occurring quartz grains from St. Peter Sandstone were also studied for comparison. In addition to certain new surfaces, features from the same samples show a wide variation and hence cannot be used as indicators of sedimentary environments. Instead, X-ray mapping suggests that Mn distribution in the surface pits relative to outer surface can be used to identify the origin of pits either as mechanical or as chemical.
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