NDLI: Grain-size and Sr–Nd isotopic compositions of dry- and wet-deposited dusts during the same dust-storm event in Harbin, China: implications for source, transport–deposition modes, dynamic mechanism and formation of eolian loess

Content Provider	Springer Nature Link
Author	Xie, Yuanyun Chi, Yunping Meng, Jie Guo, Linfeng Wang, Yanru
Copyright Year	2015
Abstract	A strong dust-storm event occurred in Harbin, China on May 11, 2011. The dry and wet dust deposits from this dust-storm event were examined in terms of grain-size and Sr–Nd isotopic compositions, along with scanning electron microscope. The dry-deposited dusts are characterized by bimodal grain-size distributions with fine mode of 3.6 μm and coarse mode of 28 μm, while the wet-deposited dusts are indicative of unimodal grain-size modes with a fine mode of 6 μm. These dust-storm depositions are derived from distal sources, for instance >1000 km away from dust sink spot, regardless of the occurrence of relatively coarse component with coarse mode at 28 μm for dry-deposited dusts. The Sr–Nd isotopic compositions of the dust-storm depositions are suggestive of the derivation from Horqin Sandy Land and, to a certain extent, Hunsandake Sandy Land, for both dry-deposited dust and wet-deposited dust. The fine mode (<10 μm) constituting fine tail and bimodality of grain-size distributions reflect the presence of fine particles as aggregates and/or adhering to larger grains, rather than fine grains having the derivation different from coarse grains. The fine particles may be transported and deposited by forming aggregates and/or by adhering to larger grains in low level. The fine grains are transported along with coarse grains during dust storms in spring, indicating dust storms being an important atmospheric circulation mode for the transportation of eolian dust. The fine and coarse particles in the CLP loess have the identical dust sources.
Starting Page	6489
Ending Page	6502
Page Count	14
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	74
Issue Number	8
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-09-02
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Dust-storm deposits Loess Source areas Fine particles Grain size Sr–Nd isotopes Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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