Extending the record of lacustrine phases beyond the last interglacial for Lake Eyre in central Australia using luminescence dating

QUATERNARY SCIENCE REVIEWS

卷:162

Article

Fu, Xiao¹  Cohen, Tim J.^1,2  Arnold, Lee J.^3,4 

[1] Univ Wollongong, Sch Earth & Environm Sci, GeoQuEST Res Ctr, Wollongong, NSW 2522, Australia

[2] Univ Wollongong, ARC Ctr Excellence Australian Biodivers & Heritag, Wollongong, NSW 2522, Australia

[3] Univ Adelaide, Sch Phys Sci, Environm Inst, North Terrace Campus, Adelaide, SA 5005, Australia

[4] Univ Adelaide, Inst Photon & Adv Sensing, North Terrace Campus, Adelaide, SA 5005, Australia

关键词: Lake Eyre;    Williams Point;    Lacustrine sediments;    Luminescence dating;    Indo-Australian monsoon;    Quaternary;   

DOI  :  10.1016/j.quascirev.2017.03.002

来源: Elsevier

【 摘 要 】

We show with multiple luminescence dating techniques that the sedimentary record for Lake Eyre, Australia's largest lake, extends beyond 200 thousand years (ka) to Marine Isotope Stage (MIS) 7. Transgressive clayey sand and finely laminated clays overlying the Miocene Etadunna Formation in Lake Eyre North document the deep-lake phases of central South Australia in the past. Until now, unresolved chronology has hampered our ability to interpret these sedimentary records, which are important for understanding the timing of the wettest phase of central Australia's late Quaternary climate. In this study, we apply quartz optically stimulated luminescence (OSL) dating, thermally-transferred OSL (TT-OSL) dating and K-feldspar post infrared infrared stimulated luminescence (pIRIR) dating to lake-floor sediments near Williams Point in Madigan Gulf to provide new age constraint for the lacustrine sediments of Lake Eyre. Methodological studies on quartz and K-feldspar demonstrate that these luminescence dating procedures are suitable for the Lake Eyre lacustrine samples and produce consistent replicate ages. A Bayesian model applied to the new dating results provides a chronological model of lacustrine deposition and shows that the transgressive clayey sand were deposited 221 +/- 19 ka to 201 +/- 101

【 授权许可】

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