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A detailed post-IR IRSL chronology for the last interglacial soil at the Jingbian loess site (northern China)
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2015 (English)In: Quaternary Geochronology, ISSN 1871-1014, E-ISSN 1878-0350, Vol. 30, 194-199 p.Article in journal (Refereed) Published
Abstract [en]

The chronology of dust deposition and climate during the last interglacial is poorly known on the Chinese Loess Plateau. Here, 51 samples were taken from the similar to 5 m S1 palaeosol (MIS5) at the desert marginal Jingbian site to develop what is currently the most detailed S1 chronology on the Plateau using instrumental dating techniques. We use the post-IR IRSL signal from sand-sized grains of K-rich feldspar. Signal resetting in the agricultural layer shows that it is possible to almost completely zero this signal in nature. First IR stimulation plateau measurements show that there is no clear dependence of D-e on first IR stimulation temperature between 50 and 260 degrees C suggesting negligible signal fading. Resultant ages are consistent with a last interglacial age (similar to 130 to similar to 75 ka) and are also consistent within errors with continuous linear sedimentation rates. The average mass accumulation rate for S1 is similar to 150 g m(-2) a(-1), considerably higher than at many other sites but within the overall range of Loess Plateau estimates. The remarkably stable sediment accumulation at the site contrasts with a more complex record of environmental and monsoonal change recorded in grain-size and magnetic susceptibility.

Place, publisher, year, edition, pages
2015. Vol. 30, 194-199 p.
Keyword [en]
Chinese loess; Last interglacial soil (S1); High sampling density; Post-IR IRSL
National Category
Geosciences, Multidisciplinary Geophysics
Identifiers
URN: urn:nbn:se:uu:diva-258523DOI: 10.1016/j.quageo.2015.02.022ISI: 000366538200011OAI: oai:DiVA.org:uu-258523DiVA: diva2:841883
Available from: 2015-07-15 Created: 2015-07-15 Last updated: 2017-12-04Bibliographically approved

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Stevens, Thomas

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