The effects of sorting by aeolian processes on the geochemical characteristics of surface materials: a wind tunnel experiment

Abstract

The geochemical characteristics of aeolian and surface materials in potential source areas of dust are frequently employed in environmental reconstructions as proxies of past climate and as source tracers of aeolian sediments deposited in downwind areas. However, variations in the geochemical characteristics of these aeolian deposits that result from near-surface winds are currently poorly understood. In this study, we collected surface samples from the Ala Shan Plateau (a major potential dust source area in Central Asia) to determine the influence of aeolian processes on the geochemical characteristics of aeolian transported materials. Correlation analyses show that compared with surface materials, the elements in transported materials (e.g., Cu, As, Pb, Mn, Zn, Al, Ca, Fe, Ga, K, Mg, P, Rb, Co, Cr, Na, Nb, Si, and Zr) were subjected to significant sorting by aeolian processes, and the sorting also varied among different particle size fractions and elements. Variations in wind velocity were significantly correlated with the contents of Cr, Ga, Sr, Ca, Y, Nd, Zr, Nb, Ba, and Al, and with the Zr/Al, Zr/Rb, K/Ca, Sr/Ca, Rb/Sr, and Ca/Al ratios. Given the great variation in the geochemical characteristics of materials transported under different aeolian processes relative to those of the source materials, these results indicate that considerable uncertainty may be introduced to analyses by using surface materials to trace the potential source areas of aeolian deposits that accumulate in downwind areas.

Keywords

aeolian process / transported material / geochemistry

References

[1] Bory A J M, Biscaye P E, Grousset F E (2003). Two distinct seasonal Asian source regions for mineral dust deposited in Greenland (NorthGRIP). Geophys Res Lett, 30(4): 1167

[2] Chen J, Chen Y, Liu L, Ji J, Balsam W, Sun Y, Lu H (2006). Zr/Rb ratio in the Chinese loess sequences and its implication for changes in the East Asian winter monsoon strength. Geochim Cosmochim Acta, 70(6): 1471–1482

[3] Chen J, Li G, Yang J, Rao W, Lu H, Balsam W, Sun Y, Ji J (2007). Nd and Sr isotopic characteristics of Chinese deserts: implications for the provenances of Asian dust. Geochim Cosmochim Acta, 71(15): 3904–3914

[4] Chen J, Li G J (2011). Geochemical studies on the source region of Asian dust. Sci China Earth Sci, 54(9): 1279–1301

[5] Dong Z, Qian G, Luo W, Wang H (2007). A wind tunnel simulation of the effects of stoss slope on the lee airflow pattern over a two-dimensional transverse dune. J Geophys Res, 112(F3): F03019

[6] Dong Z, Wang H, Liu X, Wang X (2004). The blown sand flux over a sandy surface: a wind tunnel investigation on the fetch effect. Geomorphology, 57(1‒2): 117–127

[7] Ferrat M, Weiss D J, Spiro B, Large D (2012). The inorganic geochemistry of a peat deposit on the eastern Qinghai-Tibetan Plateau and insights into changing atmospheric circulation in central Asia during the Holocene. Geochim Cosmochim Acta, 91: 7–31

[8] Hao Q, Guo Z, Qiao Y, Xu B, Oldfield F (2010). Geochemical evidence for the provenance of middle Pleistocene loess deposits in southern China. Quat Sci Rev, 29(23‒24): 3317–3326

[9] Hao Q Z, Guo Z T (2005). Spatial variations of magnetic susceptibility of Chinese loess for the last 600 kyr: implications for monsoon evolution. J Geophys Res, 110(B12): B12101

[10] Harrison S P, Kohfeld K E, Roelandt C, Claquin T (2001). The role of dust in climate changes today, at the last glacial maximum and in the future. Earth Sci Rev, 54(1‒3): 43–80

[11] Huang J, Kang S, Zhang Q, Guo J, Chen P, Zhang G, Tripathee L (2013). Atmospheric deposition of trace elements recorded in snow from the Mt. Nyainqêntanglha region, southern Tibetan Plateau. Chemosphere, 92(8): 871–881

[12] Jeong G Y, Hillier S, Kemp R A (2011). Changes in mineralogy of loess–paleosol sections across the Chinese Loess Plateau. Quat Res, 75(1): 245–255

[13] Kasper-Zubillaga J J, Armstrong-Altrin J S, Carranza-Edwards A, Morton-Bermea O, Lozano Santa Cruz R (2013). Control in beach and dune sands of the Gulf of Mexico and the role of nearby rivers. International Journal of Geosciences, 4(08): 1157–1174

[14] Kasper-Zubillaga J J, Zolezzi-Ruiz H, Carranza-Edwards A, Girón-García P, Ortiz-Zamora G, Palma M (2007). Sedimentological, modal analysis and geochemical studies of desert and coastal dunes, Altar Desert, NW México. Earth Surf Process Landf, 32(4): 489–508

[15] Larrasoaña J C, Roberts A P, Rohling E J, Winklhofer M, Wehausen R (2003). Three million years of monsoon variability over the northern Sahara. Clim Dyn, 21: 689–698

[16] Lawrence C R, Neff J C (2009). The contemporary physical and chemical flux of aeolian dust: a synthesis of direct measurements of dust deposition. Chem Geol, 267(1‒2): 46–63

[17] Lawrence C R, Reynolds R L, Ketterer M E, Neff J C (2013). Aeolian controls of soil geochemistry and weathering fluxes in high-elevation ecosystems of the Rocky Mountains, Colorado. Geochim Cosmochim Acta, 107: 27–46

[18] Li G, Chen J, Chen Y, Yang J, Ji J, Liu L (2007). Dolomite as a tracer for the source regions of Asian dust. J Geophys Res, D, Atmospheres, 112(D17): D17201

[19] Liu T (1985). Loess and Environments. Beijing: China Ocean Press, 251

[20] Livingstone I, Bullard J E, Wiggs G F S, Thomas D S G (1999). Grain-size variation on dunes in the southwest Kalahari, Southern Africa. J Sediment Res, 69(3): 546–552

[21] Maher B A (2011). The magnetic properties of Quaternary aeolian dusts and sediments, and their palaeoclimatic significance. Aeolian Res, 3(2): 87–144

[22] Maher B A, Thompson R (1991). Mineral magnetic record of the Chinese loess and paleosols. Geology, 19(1): 3–6

[23] Pullen A, Kapp P, McCallister A T, Chang H, Gehrels G E, Garzione C N, Heermance R V, Ding L (2011). Qaidam Basin and northern Tibetan Plateau as dust sources for the Chinese Loess Plateau and paleoclimatic implications. Geology, 39(11): 1031–1034

[24] Rao W B, Chen J, Yang J D, Ji J F, Li G J, Tan H B (2008). Sr-Nd isotopic characteristics of eolian deposits in the Erdos Desert and Chinese Loess Plateau: implications for their provenances. Geochem J, 42(3): 273–282

[25] Rodrigo-Gámiz M, Martínez-Ruiz F, Jiménez-Espejo F J, Gallego-Torres D, Nieto-Moreno V, Romero O, Ariztegui D (2011). Impact of climate variability in the western Mediterranean during the last 20,000 years: oceanic and atmospheric responses. Quat Sci Rev, 30(15‒16): 2018–2034

[26] Stevens T, Palk C, Carter A, Lu H, Clift P D (2010). Assessing the provenance of loess and desert sediments in northern China using U-Pb dating and morphology of detrital zircons. Geol Soc Am Bull, 122(7‒8): 1331–1344

[27] Sun J, Zhu X (2010). Temporal variations in Pb isotopes and trace element concentrations within Chinese eolian deposits during the past 8 Ma: Implications for provenance change. Earth Planet Sci Lett, 290(3‒4): 438–447

[28] Sun Y B, Wang X, Liu Q, Clemens S (2010). impacts of post-depositional processes on rapid monsoon signals recorded by the last glacial loess deposits of northern China. Earth Planet Sci Lett, 289(1‒2): 171–179

[29] Taylor S R, McLennan S M (1985). The Continental Crust: Its Composition and Evolution. Oxford: Blackwell Scientific Publication, 312

[30] Wang X, Lang L, Hua T, Wang H, Zhang C, Wang Z (2012a). Characteristics of the Gobi desert and their significance for dust emissions in the Ala Shan Plateau (Central Asia): an experimental study. J Arid Environ, 81: 35–46

[31] Wang X, Lang L, Hua T, Zhang C, Xia D (2015). Geochemical and magnetic characteristics of aeolian transported materials under different near-surface wind fields: an experimental study. Geomorphology, 239: 106–113

[32] Wang X, Lang L, Zhang C, Hua T, Wang H (2012b). The influence of near-surface winds on Sr isotope composition of aeolian sediments: a wind tunnel experiment. Chem Geol, 308–309: 10–17

[33] Wang X, Xia D, Wang T, Xue X, Li J (2008). Dust sources in arid and semiarid China and southern Mongolia: impacts of geomorphological setting and surface materials. Geomorphology, 97(3‒4): 583–600

[34] Wang X, Xia X, Zhang C, Lang L, Hua T, Zhao S (2012c). Geochemical and magnetic characteristics of fine-grained surface sediments in potential dust source areas: implications for tracing the provenance of aeolian deposits and associated palaeoclimatic change in East Asia. Palaeogeogr Palaeoclimatol Palaeoecol, 323–325: 123–132

[35] Weiss D, Shotyk W, Rieley J, Page S, Gloor M, Reese S, Martinez-Cortizas A (2002). The geochemistry of major and selected trace elements in a forested peat bog, Kalimantan, SE Asia, and its implications for past atmospheric dust deposition. Geochim Cosmochim Acta, 66(13): 2307–2323

[36] Yancheva G, Nowaczyk N R, Mingram J, Dulski P, Schettler G, Negendank J F W, Liu J, Sigman D M, Peterson L C, Haug G H (2007). Influence of the intertropical convergence zone on the East Asian monsoon. Nature, 445(7123): 74–77

[37] Yang J, Li G, Rao W, Ji J (2009). Isotopic evidences for provenance of East Asian Dust. Atmos Environ, 43(29): 4481–4490

Acknowledgements

This work was supported by the National Key Research and Development Program of China (No. 2016YFA0601900), grants from the National Natural Science Foundation of China (Grant Nos. 41225001 and 41401005), and the Foundation of the Director of the Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences. Special thanks are given to anonymous referees and the journal editor for constructive criticism of an earlier version of this manuscript.

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