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GEOREF RECORD

Natural and anthropogenic sources of east Asian dust

Li Gaojun, Chen Jun, Ji Junfeng, Yang Jiedong and Tim M. Conway
Natural and anthropogenic sources of east Asian dust
Geology (Boulder) (August 2009) 37 (8): 727-730

Abstract

Nd-Sr isotopic signatures of loess, modern dust, and their potential source materials are systematically investigated to discriminate the natural and anthropogenic sources of eastern Asian dust. Chinese loess is an eolian deposit that has accumulated over the past few million years, and is characterized by a negative Nd-Sr isotopic correlation that implies binary sources for the natural background of eastern Asian dust. Loess in northeastern China shows the highest epsilon (sub Nd) (0) value, while loess in western China has the lowest epsilon (sub Nd) (0). Considering the Nd-Sr isotopic signatures of the potential sources, we propose that the high epsilon (sub Nd) (0) end member is derived from the arid lands around the northern boundary of China while the low epsilon (sub Nd) (0) end member originates from the deserts on the northern margin of the Tibetan Plateau. Chinese Loess Plateau deposits are dominated by northern margin Tibetan Plateau dust, suggesting a strong link between the thick eolian deposit in this region and the evolution of the Tibetan Plateau. The long-range transported spring dust in both Nanjing (south China) and Japan has an Nd-Sr isotopic composition similar to that of loess. However, spring dust in Beijing (north China) has a much lower epsilon (sub Nd) (0) value, indicating an additional anthropogenic contribution of low epsilon (sub Nd) (0) material, possibly from the sandy lands in the adjacent north and west.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 37
Serial Issue: 8
Title: Natural and anthropogenic sources of east Asian dust
Affiliation: Nanjing University, State Laboratory of Mineral Deposits Research, Nanjing, China
Pages: 727-730
Published: 200908
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 42
Accession Number: 2009-072366
Categories: Quaternary geologySedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2009175
Illustration Description: illus. incl. sketch map
N34°00'00" - N39°40'00", E106°30'00" - E111°15'00"
Secondary Affiliation: University of Cambridge, GBR, United Kingdom
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200939
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