Quantitative bulk and single-particle mineralogy of a thick Chinese loess–paleosol section: implications for loess provenance and weathering

Jeong, Gi Young; Hillier, S. J.; Kemp, Richard I.

doi:10.1016/j.quascirev.2008.02.006

Cited by 87 publications

(72 citation statements)

References 54 publications

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“…TEM imaging and EDX spectroscopy of individual clay grains of the Asian dusts and their deposits (Chinese loess) showed that ISCMs contain ca. 5-7 % of Fe (Jeong, 2008;Jeong et al, 2008Jeong et al, , 2011this study). About 85 % (vol.)…”

Section: Transport Of Reactive Minerals and Nutrientsmentioning

confidence: 72%

“…However, the mineral types dominating dust particles can be reliably estimated from the EDX spectral pattern, compared with those of reference mineral particles. The mineralogical identification of the Asian dust particles was greatly facilitated by referring to quantitative mineralogical and microscopic data of the source soils and the Chinese loess deposited from the Asian dust around desert sources (Jeong, 2008;Jeong et al, 2008Jeong et al, , 2011. Additionally, our SEM-EDXS identifications of Asian dust particles were confirmed by the TEM and EDXS analysis of the FIB slices of individual dust particles.…”

Section: Dust Samples and Methodsmentioning

confidence: 96%

“…Fine-scale mixing of submicron platelets of clay minerals made classification more difficult. Clay minerals in dust and sediments include illite, smectite, illitesmectite mixed layers, kaolinite, vermiculite, and chlorite (Shi et al, 2005;Jeong and Chun, 2006;Jeong, 2008;Jeong et al, 2008Jeong et al, , 2011. Kaolinite and chlorite were readily identified from their EDX spectra; however, illite, smectite, illitesmectite mixed layers, and vermiculite could not be positively identified because of their fine-scale mixing.…”

Section: Dust Samples and Methodsmentioning

confidence: 99%

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Long-range transport of giant particles in Asian dust identified by physical, mineralogical, and meteorological analysis

et al. 2014

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Abstract. Giant particles transported over long distances are generally of limited concern in atmospheric studies due to their low number concentrations in mineral dust and possible local origin. However, they can play an important role in regional circulation of earth materials due to their enormous volume concentration. Asian dust laden with giant particles was observed in Korea on 31 March 2012, after a migration of about 2000 km across the Yellow Sea from the Gobi Desert. Scanning electron microscopy (SEM) revealed that 20 % of the particles exceeded 10 µm in equivalent sphere diameter, with a maximum of 60 µm. The median diameter from the number distribution was 5.7 µm, which was larger than the diameters recorded of 2.5 and 2.9 µm in Asian dust storms in 2010 and 2011, respectively, and was consistent with independent optical particle counter data. Giant particles (> 10 µm) contributed about 89 % of the volume of the dust in the 2012 storm. Illite-smectite series clay minerals were the major mineral group followed by quartz, plagioclase, K-feldspar, and calcite. The total phyllosilicate content was ∼52 %. The direct long-range transport of giant particles was confirmed by calcite nanofibers closely associated with clays in a submicron scale identified by high-resolution SEM and transmission electron microscopy. Since giant particles consisted of clay agglomerates and clay-coated quartz, feldspars, and micas, the mineral composition varied little throughout the fine (< 5 µm), coarse (5-10 µm), giant-S (10-20 µm), and giant-L (> 20 µm) size bins. Analysis of the synoptic conditions of the 2012 dust event and its migration indicated that the mid-tropospheric strong wind belt directly stretching to Korea induced rapid transport of the dust, delivering giant particles. Giant dust particles with high settling velocity would be the major input into the terrestrial and marine sedimentary and ecological systems of East Asia and the western Pacific. Analysis of ancient aeolian deposits in Korea suggested the common deposition of giant particles from Asian dust through the late Quaternary Period. The roles of giant particles should be reviewed with regard to regional circulation of mineral particles and nutrients.

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Section: Transport Of Reactive Minerals and Nutrientsmentioning

confidence: 72%

Section: Dust Samples and Methodsmentioning

confidence: 96%

Section: Dust Samples and Methodsmentioning

confidence: 99%

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Long-range transport of giant particles in Asian dust identified by physical, mineralogical, and meteorological analysis

et al. 2014

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“…The postdepositional effects of weathering (Liang et al, 2009) and pedogenesis generate variations in the composition of loess stratigraphic sequences, and these variations have been used as a proxy to reconstruct regional paleoclimates (Sun, 2005;Jeong et al, 2008;Sun et al, 2008;Hu et al, 2013;Wimpenny et al, 2014) and past atmospheric circulations (Gallet et al, 1996). In recent decades, many studies have suggested that the dominant sources of loess on the CLP are gobi and sandy deserts (Torii et al, 2001;Sun, 2002), deflation pans , and piedmont alluvial fans (Derbyshire et al, 1998;Wang et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Geochemical evidence for seasonal variations in potential loess sources of the western Chinese Loess Plateau

Wang

Lang

et al. 2015

Atmospheric Environment

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“…Mineralogical differentiation of loess and paleosol has occurred as result of eolian transportation and chemical weathering after deposition (Jeong et al, 2008(Jeong et al, , 2011. The various environmental conditions that prevailed during soil formation have determined the successive stages of the mineralogical evolution (Turpault et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Characteristics of the fifth paleosol complex (S5) in the southernmost part of the Chinese Loess Plateau and its paleo-environmental significance

Huang

Tan

Wang

et al. 2014

CATENA

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Quantitative bulk and single-particle mineralogy of a thick Chinese loess–paleosol section: implications for loess provenance and weathering

Cited by 87 publications

References 54 publications

Long-range transport of giant particles in Asian dust identified by physical, mineralogical, and meteorological analysis

Long-range transport of giant particles in Asian dust identified by physical, mineralogical, and meteorological analysis

Geochemical evidence for seasonal variations in potential loess sources of the western Chinese Loess Plateau

Characteristics of the fifth paleosol complex (S5) in the southernmost part of the Chinese Loess Plateau and its paleo-environmental significance

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