Late quaternary OSL chronologies from the Qinghai Lake (NE Tibetan Plateau): Intercomparison of quartz and K-feldspar ages to assess the pre-depositional bleaching

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Late quaternary OSL chronologies from the Qinghai Lake (NE Tibetan Plateau): Intercomparison of quartz and K-feldspar ages to assess the pre-depositional bleaching. / Long, Hao ; Tsukamoto, Sumiko; Buylaert, Jan-Pieter; Murray, Andrew Sean; Jain, Mayank; Frechen, Manfred.

In: Quaternary Geochronology, Vol. 49, 2019, p. 159-164.

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

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@article{7f45636b645f4dd397e251a15d6e6c8e,
title = "Late quaternary OSL chronologies from the Qinghai Lake (NE Tibetan Plateau): Intercomparison of quartz and K-feldspar ages to assess the pre-depositional bleaching",
abstract = "Signal resetting prior to deposition is an important factor for the accuracy of luminescence dating. In this study, resetting of the quartz optically stimulated luminescence (OSL) signal from samples collected from different depositional environments (alluvial, beach, and aeolian sediments) around the Qinghai Lake basin (northeastern Tibetan Plateau) was examined using its inter-comparison with post-IR infrared stimulated luminescence (IRSL) measured at 290 °C (pIRIR290) from K-feldspar. Dose recovery tests were carried out to test the success of the single aliquot regenerative-dose (SAR) protocol for quartz and feldspar. Additionally, stability tests (first IR temperature plateau and g-values) were performed for the pIRIR290. We observe that most of the K-feldspar pIRIR290 and quartz OSL ages are consistent with each other (within 10{\%}), suggesting that the quartz OSL signal was well-bleached prior to the deposition. The ages of loess samples range between ∼13.1 and ∼1.5 ka, the alluvial sediments between ∼35 ka and ∼14 ka, and beach sediments between 60 and 50 ka, corresponding to early Marine Isotope Stage (MIS) 3. These quartz OSL chronologies suggest a lake highstand during very early MIS 3, a lowstand during late MIS 3 and MIS 2, and widespread loess accumulation through the Holocene in the Qinghai Lake basin.",
keywords = "Lake sediments, Bleaching, Quarz OSL, K-feldspar pIRIR, Lake level",
author = "Hao Long and Sumiko Tsukamoto and Jan-Pieter Buylaert and Murray, {Andrew Sean} and Mayank Jain and Manfred Frechen",
year = "2019",
doi = "10.1016/j.quageo.2018.05.003",
language = "English",
volume = "49",
pages = "159--164",
journal = "Quaternary Geochronology",
issn = "1871-1014",
publisher = "Elsevier B.V.",

}

RIS

TY - JOUR

T1 - Late quaternary OSL chronologies from the Qinghai Lake (NE Tibetan Plateau): Intercomparison of quartz and K-feldspar ages to assess the pre-depositional bleaching

AU - Long, Hao

AU - Tsukamoto, Sumiko

AU - Buylaert, Jan-Pieter

AU - Murray, Andrew Sean

AU - Jain, Mayank

AU - Frechen, Manfred

PY - 2019

Y1 - 2019

N2 - Signal resetting prior to deposition is an important factor for the accuracy of luminescence dating. In this study, resetting of the quartz optically stimulated luminescence (OSL) signal from samples collected from different depositional environments (alluvial, beach, and aeolian sediments) around the Qinghai Lake basin (northeastern Tibetan Plateau) was examined using its inter-comparison with post-IR infrared stimulated luminescence (IRSL) measured at 290 °C (pIRIR290) from K-feldspar. Dose recovery tests were carried out to test the success of the single aliquot regenerative-dose (SAR) protocol for quartz and feldspar. Additionally, stability tests (first IR temperature plateau and g-values) were performed for the pIRIR290. We observe that most of the K-feldspar pIRIR290 and quartz OSL ages are consistent with each other (within 10%), suggesting that the quartz OSL signal was well-bleached prior to the deposition. The ages of loess samples range between ∼13.1 and ∼1.5 ka, the alluvial sediments between ∼35 ka and ∼14 ka, and beach sediments between 60 and 50 ka, corresponding to early Marine Isotope Stage (MIS) 3. These quartz OSL chronologies suggest a lake highstand during very early MIS 3, a lowstand during late MIS 3 and MIS 2, and widespread loess accumulation through the Holocene in the Qinghai Lake basin.

AB - Signal resetting prior to deposition is an important factor for the accuracy of luminescence dating. In this study, resetting of the quartz optically stimulated luminescence (OSL) signal from samples collected from different depositional environments (alluvial, beach, and aeolian sediments) around the Qinghai Lake basin (northeastern Tibetan Plateau) was examined using its inter-comparison with post-IR infrared stimulated luminescence (IRSL) measured at 290 °C (pIRIR290) from K-feldspar. Dose recovery tests were carried out to test the success of the single aliquot regenerative-dose (SAR) protocol for quartz and feldspar. Additionally, stability tests (first IR temperature plateau and g-values) were performed for the pIRIR290. We observe that most of the K-feldspar pIRIR290 and quartz OSL ages are consistent with each other (within 10%), suggesting that the quartz OSL signal was well-bleached prior to the deposition. The ages of loess samples range between ∼13.1 and ∼1.5 ka, the alluvial sediments between ∼35 ka and ∼14 ka, and beach sediments between 60 and 50 ka, corresponding to early Marine Isotope Stage (MIS) 3. These quartz OSL chronologies suggest a lake highstand during very early MIS 3, a lowstand during late MIS 3 and MIS 2, and widespread loess accumulation through the Holocene in the Qinghai Lake basin.

KW - Lake sediments

KW - Bleaching

KW - Quarz OSL

KW - K-feldspar pIRIR

KW - Lake level

U2 - 10.1016/j.quageo.2018.05.003

DO - 10.1016/j.quageo.2018.05.003

M3 - Journal article

VL - 49

SP - 159

EP - 164

JO - Quaternary Geochronology

JF - Quaternary Geochronology

SN - 1871-1014

ER -