Dust Sources of Last Glacial Chinese Loess Based on the Iron Mineralogy of Fractionated Source Samples

2019 ◽  
Vol 46 (4) ◽  
pp. 2103-2110 ◽  
Author(s):  
Jia Jia ◽  
Youjun Wang ◽  
Dunsheng Xia ◽  
Hao Lu ◽  
Fuyuan Gao
Keyword(s):  
Chinese Loess ◽  
Last Glacial ◽  
Dust Sources ◽  
Iron Mineralogy

scholarly journals Insights into the provenance of the Chinese Loess Plateau from joint zircon U-Pb and garnet geochemical analysis of last glacial loess

2017 ◽  
Vol 89 (3) ◽  
pp. 645-659 ◽  
Author(s):  
Kaja Fenn ◽  
Thomas Stevens ◽  
Anna Bird ◽  
Mara Limonta ◽  
Martin Rittner ◽  
...  
Keyword(s):  
Loess Plateau ◽  
Detrital Zircons ◽  
Chinese Loess Plateau ◽  
Provenance Analysis ◽  
The Loess Plateau ◽  
Chinese Loess ◽  
Last Glacial ◽  
Dust Sources ◽  
Single Grain ◽  
The Chinese Loess Plateau

AbstractThe Chinese Loess Plateau, the world’s largest and oldest loess record, preserves evidence of Asia’s long-term dust source dynamics, but there is uncertainty over the source of the deposits. Recent single-grain detrital zircon U-Pb age analysis has progressed this issue, but debates remain about source changes, and the generation and interpretation of zircon data. To address this, we analyze different groupings of new and existing datasets from the Loess Plateau and potential sources. We also present the results of a first high resolution sampling, multi-proxy provenance analysis of Beiguoyuan loess using U-Pb dating of detrital zircons and detrital garnet geochemistry. The data shows that some small source differences seem to exist between different areas on the Loess Plateau. However, sediment source appears to be unchanging between loess and palaeosols, supporting a recent material recycling hypothesis. Our zircon and garnet data demonstrates, however, that Beiguoyuan experienced a temporary, abrupt source shift during the last glacial maximum, implying that local dust sources became periodically active during the Quaternary. Our results highlight that grouping data to achieve bigger datasets could cause identification of misleading trends. Additionally, we suggest that multi-proxy single-grain approaches are required to gain further insight into Chinese Loess Plateau dust sources.

Qaidam Basin and northern Tibetan Plateau as dust sources for the Chinese Loess Plateau and paleoclimatic implications

Geology ◽  
2011 ◽  
Vol 39 (11) ◽  
pp. 1031-1034 ◽  
Author(s):  
A. Pullen ◽  
P. Kapp ◽  
A. T. McCallister ◽  
H. Chang ◽  
G. E. Gehrels ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Loess Plateau ◽  
Qaidam Basin ◽  
Chinese Loess Plateau ◽  
Chinese Loess ◽  
Northern Tibetan Plateau ◽  
Dust Sources ◽  
The Chinese Loess Plateau

scholarly journals A new OSL chronology for dust accumulation in the last 130,000 yr for the Chinese Loess Plateau

2007 ◽  
Vol 67 (1) ◽  
pp. 152-160 ◽  
Author(s):  
Y.C. Lu ◽  
X.L. Wang ◽  
A.G. Wintle
Keyword(s):  
Accumulation Rate ◽  
Chinese Loess Plateau ◽  
Last Interglacial ◽  
High Accumulation ◽  
Chinese Loess ◽  
Oxygen Isotope Stage ◽  
Last Glacial ◽  
Fine Grained ◽  
The Last Glacial ◽  
Dust Accumulation

AbstractA sensitivity-corrected Multiple Aliquot Regenerative-dose protocol has been developed for fine-grained quartz OSL dating of Chinese loess. Its reliability has been assessed on the basis of the methodology and by dating reference samples of known age close to the transition from the last interglacial paleosol (S1) to the last glacial loess (L1), which corresponds to the Marine Oxygen Isotope Stage (MIS) 5/4 transition. On the basis of the fine-grained quartz OSL-age estimates for 33 loess samples from the upper part of the Luochuan profile, a detailed chronostratigraphy of continuous dust accumulation in the past 130 ka has been proposed. Changes in the accumulation rate occurred during the last glacial period (MIS 4 to MIS 2); unexpectedly, high accumulation rates were found in the weakly developed L1–2(S) paleosol of the last interstadial (MIS 3), rather than in the classic L1–1 and L1–3 loess of the cold–dry glacial condition (MIS 2 and 4). The OSL ages show some disagreement with the previous numerical chronology for the loess–paleosol sequence based on correlation of variations in grain size with sedimentation rate; the latter method resulted in an almost constant accumulation rate from 72 to 12 ka.

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