High-resolution OSL dating of a late Quaternary sequence from Xingkai Lake (NE Asia): Chronological challenge of the “MIS 3a Mega-paleolake” hypothesis in China

Long, Hao; Shen, Ji; Yong, Wang; Gao, Lei; Frechen, Manfred

doi:10.1016/j.epsl.2015.07.003

Cited by 58 publications

(40 citation statements)

References 54 publications

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“…When additional rejection criteria (Fast Ratio 58 , and the D 0 criterion 59 ) (Supplementary Note 4) were applied to the quartz single-grain dose distributions, the resulting ages were consistent with the more precise multi-grain feldspar ages (Supplementary Note 5). This agreement supports the hypothesis that both signals were well bleached or reset at deposition 60, 61 and thus the feldspar ages are used in further discussion (Supplementary Table 8). …”

Section: Resultssupporting

confidence: 82%

Counter-intuitive influence of Himalayan river morphodynamics on Indus Civilisation urban settlements

et al. 2017

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Urbanism in the Bronze-age Indus Civilisation (~4.6–3.9 thousand years before the present, ka) has been linked to water resources provided by large Himalayan river systems, although the largest concentrations of urban-scale Indus settlements are located far from extant Himalayan rivers. Here we analyse the sedimentary architecture, chronology and provenance of a major palaeochannel associated with many of these settlements. We show that the palaeochannel is a former course of the Sutlej River, the third largest of the present-day Himalayan rivers. Using optically stimulated luminescence dating of sand grains, we demonstrate that flow of the Sutlej in this course terminated considerably earlier than Indus occupation, with diversion to its present course complete shortly after ~8 ka. Indus urban settlements thus developed along an abandoned river valley rather than an active Himalayan river. Confinement of the Sutlej to its present incised course after ~8 ka likely reduced its propensity to re-route frequently thus enabling long-term stability for Indus settlements sited along the relict palaeochannel.

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Section: Resultssupporting

confidence: 82%

Counter-intuitive influence of Himalayan river morphodynamics on Indus Civilisation urban settlements

et al. 2017

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“…U disequilibria can present potential problems during the OSL dating of lacustrine sediments from the TP (Long et al . , ). As shown in Fig.…”

Section: Discussionmentioning

confidence: 99%

“…; Long et al . , b, , ) and deep (Long et al . , ) lake sites on the TP have been dated using OSL methods.…”

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confidence: 99%

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Chronology of a lacustrine core from Lake Linggo Co using a combination ofOSL,¹⁴C and²¹⁰Pb dating: implications for the dating of lacustrine sediments from the Tibetan Plateau

Zhang

et al. 2017

Boreas

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Vast palaeolakes once occupied the Qinghai‐Tibetan Plateau (TP). Analyses of the sedimentary records of these lakes could potentially provide an extensive dating archive. Many previously constructed age‐depth models simulating lacustrine cores have been principally based on radiocarbon (14C) dating. However, such dating could have been hampered by the so‐called ‘lake reservoir effect’ (LRE) and the reworking of lakebed sediments, resulting in inaccurate 14C age‐depth models and limiting interpretations of existing lacustrine palaeoclimatic records. Lake Linggo Co is located on the central TP, in one of the coldest and most arid regions of Tibet. We dated a 9.87‐m‐long lacustrine core extracted from the lakebed at a water depth of ~60 m using a combination of 210Pb, 14C and optically stimulated luminescence (OSL) techniques. Some 14C ages showed significant age reversals; all the 14C ages were much older than the 210Pb and OSL ages for the same depths. This could possibly be attributed to the presence of old, inherited carbon, causing the inherited 14C age to appear unstable during the deposition period. The 210Pb and OSL ages were roughly concordant, and were also consistent with the stratigraphical succession. We therefore suggest that 14C dating may, on its own, be inadequate for accurate dating of lacustrine sediment sites on the TP, and that the OSL method should also be applied in order to evaluate the reliability of any 14C ages. With this approach, we constructed an age‐depth model, revealing sedimentation rates of 1.7, 0.8, 6.8 and 0.6 mm a−1 between 0–1.9, 1.9–4.2, 4.2–4.4 and 4.4–9.4 ka, respectively.

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“…The dose rates of quartz samples from different shorelines vary slightly between 2.1 and 2.7 Gy ka −1 , indicating the dose rate of these samples may not be affected by uranium decay series disequilibrium (Olley et al ., ). Uranium decay series disequilibrium is nearly always present in lacustrine silt and very fine‐grained silt, most often related to large amounts of organic matter and carbonates (Lukas et al ., ; Long et al ., ,). However, luminescence dating samples from shorelines are mainly beach sand, and the organic matter and carbonate contents in these shoreline deposits are very low.…”

Section: Resultsmentioning

confidence: 97%

Late Quaternary lake evolution in the Gaxun Nur basin, central Gobi Desert, China, based on quartz OSL and K‐feldspar pIRIR dating of paleoshorelines

Jin

et al. 2017

J Quaternary Science

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Paleoenvironmental changes in the Gobi Desert of Mongolia are of global significance because fluvial and lacustrine deposits in the region constitute one of the dominant sources of Northern Hemisphere dust. A series of well‐preserved geomorphic shoreline features at different elevations around the Gaxun Nur basin, central Gobi Desert, indicate past fluctuations of the basin's terminal lake. We measured the exact elevation of shorelines in the basin using a Differential Global Positioning System, and found six shorelines at ∼24, ∼20, ∼18, ∼16, ∼15 m and ∼8 m above the modern basin floor. Quartz optically stimulated luminescence and K‐feldspar post‐infrared infrared stimulated luminescence methods were used to date these shoreline features. The reliability of the dates was confirmed using internal checks of luminescence characteristics and by comparing the quartz and K‐feldspar ages. Our results suggest a lake developed in the Gaxun Nur basin by at least ∼121 ka. Lake levels increased from ∼8 to ∼24 m from ∼121 to ∼85 ka. A 20–13‐m‐deep lake again formed in the basin between ∼8.4 and 0.8 ka. Monsoonal precipitation and temperature variations during Marine Isotope Stage 5 and the mid–late Holocene were the likely causes of paleolake formation and lake level fluctuations.

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High-resolution OSL dating of a late Quaternary sequence from Xingkai Lake (NE Asia): Chronological challenge of the “MIS 3a Mega-paleolake” hypothesis in China

Cited by 58 publications

References 54 publications

Counter-intuitive influence of Himalayan river morphodynamics on Indus Civilisation urban settlements

Counter-intuitive influence of Himalayan river morphodynamics on Indus Civilisation urban settlements

Chronology of a lacustrine core from Lake Linggo Co using a combination ofOSL,¹⁴C and²¹⁰Pb dating: implications for the dating of lacustrine sediments from the Tibetan Plateau

Late Quaternary lake evolution in the Gaxun Nur basin, central Gobi Desert, China, based on quartz OSL and K‐feldspar pIRIR dating of paleoshorelines

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High-resolution OSL dating of a late Quaternary sequence from Xingkai Lake (NE Asia): Chronological challenge of the “MIS 3a Mega-paleolake” hypothesis in China

Cited by 58 publications

References 54 publications

Counter-intuitive influence of Himalayan river morphodynamics on Indus Civilisation urban settlements

Counter-intuitive influence of Himalayan river morphodynamics on Indus Civilisation urban settlements

Chronology of a lacustrine core from Lake Linggo Co using a combination ofOSL,14C and210Pb dating: implications for the dating of lacustrine sediments from the Tibetan Plateau

Late Quaternary lake evolution in the Gaxun Nur basin, central Gobi Desert, China, based on quartz OSL and K‐feldspar pIRIR dating of paleoshorelines

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Chronology of a lacustrine core from Lake Linggo Co using a combination ofOSL,¹⁴C and²¹⁰Pb dating: implications for the dating of lacustrine sediments from the Tibetan Plateau