globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2013.03.018
Scopus记录号: 2-s2.0-84878917033
论文题名:
Luminescence dating of the PASADO core 5022-1D from Laguna Potrok Aike (Argentina) using IRSL signals from feldspar
作者: Buylaert J.-P.; Murray A.S.; Gebhardt A.C.; Sohbati R.; Ohlendorf C.; Thiel C.; Wastegård S.; Zolitschka B.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 71
起始页码: 70
结束页码: 80
语种: 英语
英文关键词: Bleaching ; ICDP-project PASADO ; K-feldspar ; Luminescence ; Post-IR IRSL
Scopus关键词: ICDP-project PASADO ; Independent age control ; K-feldspar ; Laguna potrok aike ; Luminescence dating ; Measurement protocol ; Post-IR IRSL ; Signal instabilities ; Bleaching ; Cleaning ; Feldspar ; Lakes ; Quartz ; Stratigraphy ; Luminescence ; bleaching ; chronology ; feldspar ; luminescence dating ; signal ; volcanic ash ; Argentina ; Laguna Potrok Aike ; Santa Cruz [Argentina]
英文摘要: We have measured and tested a luminescence chronology for the PASADO core 5022-1D from the maar lake of Laguna Potrok Aike. Because of unsuitable quartz OSL characteristics, sand-sized K-feldspar extracts were chosen as a dosimeter and the dose was measured using a post-IR IRSL (pIRIR290) measurement protocol. Using this approach we were able to access a stable signal and thus avoid the ubiquitous problem of feldspar signal instability. Extensive laboratory tests show that the chosen pIRIR290 protocol is applicable to these samples. We also developed a new criterion based on known relative bleaching rates of the conventional IRSL signal (IR50) and the pIRIR290 signal and the relationship between resulting equivalent doses; this is used to identify and reject poorly bleached samples. Eighteen samples out of 47 were rejected based on this criterion, without reference to absolute doses or stratigraphy; the resulting age-depth profile is self-consistent, increases smoothly with depth and is in agreement with independent age control based on volcanic ash layers (Reclús, Mt Burney and Hudson tephras) at the top and middle of the core. Our new luminescence chronology suggests that the 5022-1D core reaches back to ~65ka at ~96m below lake floor. © 2013 Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60621
Appears in Collections:过去全球变化的重建

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作者单位: Nordic Laboratory for Luminescence Dating, Department of Geoscience, Aarhus University, DTU Risø Campus, DK-4000 Roskilde, Denmark; Technical University of Denmark, Center for Nuclear Technologies, DTU Risø Campus, Building 201, Frederiksborgvej 399, DK-4000 Roskilde, Denmark; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, 27568 Bremerhaven, Germany; Institute of Geography, University of Bremen, 28359 Bremen, Germany; Department of Physical Geography and Quaternary Geology, Stockholm University, SE-10691 Stockholm, Sweden

Recommended Citation:
Buylaert J.-P.,Murray A.S.,Gebhardt A.C.,et al. Luminescence dating of the PASADO core 5022-1D from Laguna Potrok Aike (Argentina) using IRSL signals from feldspar[J]. Quaternary Science Reviews,2013-01-01,71
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