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http://dx.doi.org/10.9727/jmsk.2018.31.2.103

Mineralogical Properties of Asian Dust in April 6 and 15, 2018, Korea  

Jeong, Gi Young (Department of Earth and Environmental Sciences, Andong National University)
Publication Information
Journal of the Mineralogical Society of Korea / v.31, no.2, 2018 , pp. 103-111 More about this Journal
Abstract
Mineralogical properties of two Asian dust (Hwangsa) samples collected during dust events in April 6 and 15, 2018 were examined by X-ray diffraction (XRD) and scanning electron microscopy (SEM). XRD analyses showed that Asian dusts were dominated by phyllosilicates (62 wt%) comprising illite-smectite series clay minerals (ISCMs) (55%), chlorite (3%) and kaolinite (4%). Nonphyllosilicate minerals were quartz (18%), plagioclase (9%), K-feldspar (3%), calcite (3%), and gypsum (2-4%). Mineral compositions determined by SEM chemical analyses were consistent with XRD data. ISCMs occur as submicron grains forming aggregate particles or coating coarse mineral grains such as quartz, plagioclase, K-feldspar, chlorite, and calcite. The ISCMs are often associated with calcite nanofibers and gypsum blades. Mineralogical properties of 2018 dusts were similar to those of previous dusts although clay contents were higher than that of coarse 2012 dust.
Keywords
Hwangsa; dust; mineral; X-ray diffraction; scanning electron microscopy; clay;
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