Quaternary Geochronology最新文献

{"title":"First investigation of the luminescence dating of loess in the eastern Tibetan Plateau using K-feldspar MAR MET-pIRIR protocol","authors":"Li Liu,&nbsp;Shengli Yang,&nbsp;Pushuang Li,&nbsp;Jingzhao Zhang,&nbsp;Rui Li,&nbsp;Dongxue Li,&nbsp;Xuechao Xu,&nbsp;Yuanlong Luo,&nbsp;Xiuyun Yang","doi":"10.1016/j.quageo.2024.101648","DOIUrl":"10.1016/j.quageo.2024.101648","url":null,"abstract":"<div><div>The multi-aliquot regenerative dose (MAR) multi-elevated-temperature post-infrared infrared stimulated luminescence (MET-pIRIR) dating protocol exhibits great potential for extending the luminescence dating limit. However, further investigations are needed. Loess deposits on the Tibetan Plateau (TP) significantly differ from those on the Chinese Loess Plateau in terms of both formation age and dust source, making them ideal for studying the past climatic and environmental changes on the TP. However, detailed chronological studies are lacking. This study investigates the applicability of the MAR MET-pIRIR protocol to the Danba (DB) loess-paleosol sequence in the eastern TP, aiming to establish a chronological framework for this typical loess sequence. For TP loess samples with equivalent doses (D_e) below ∼950 Gy, multi-aliquot MET-pIRIR₂₅₀ and single-aliquot pIR₂₀₀IR₂₉₀ dating methods yield consistent results. However, for samples with D_e exceeding ∼950 Gy, the SAR-pIR₂₀₀IR₂₉₀ method underestimates ages, while the MAR MET-pIRIR₂₅₀ procedure remains reliable up to ∼1100 Gy. Using MAR MET-pIRIR protocol with the global standard growth curve method, we have established a new absolute chronological framework for the DB loess-paleosol sequence, indicating that loess deposition in the TP began at least ∼230 ka ago. The magnetic susceptibility records of this loess sequence reveal a pattern of alternating moist interglacial and dry glacial periods. During the last interglacial period, precipitation levels were significantly elevated and exhibited considerable variation in the eastern TP.</div></div>","PeriodicalId":54516,"journal":{"name":"Quaternary Geochronology","volume":"86 ","pages":"Article 101648"},"PeriodicalIF":1.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new tephrochronological record of a raised bog in eastern lowland Scotland","authors":"Li Wang ,&nbsp;Katherine H. Roucoux ,&nbsp;Althea L. Davies ,&nbsp;Shuang Zhang ,&nbsp;Chunqing Sun ,&nbsp;Richard T. Streeter ,&nbsp;William Hutchison ,&nbsp;Ian T. Lawson","doi":"10.1016/j.quageo.2024.101647","DOIUrl":"10.1016/j.quageo.2024.101647","url":null,"abstract":"<div><div>Cryptotephras have been widely used as a chronological tool for studying past environmental change, but many temporal and spatial gaps remain in our knowledge of the distribution of cryptotephra records. Here, last millennium cryptotephras were identified and analysed for the first time in eastern lowland Scotland. Six tephra layers were identified in six replicate short peat cores at Bankhead Moss, a raised bog in Fife, eastern lowland Scotland. Geochemical and stratigraphic correlations indicate that the tephras originate from Icelandic and Alaskan sources. We make firm correlations to Askja 1875 and WRAe, a broad correlation to Mount Churchill with the possibility of Lena tephra being inferred from its estimated timing, and uncertain correlations of three tephra layers of Icelandic origin, considering the mixed nature of these three tephra layers under the potential influence from post-depositional reworking and multiple volcanic sources, e.g. Hekla, Öræfajökull and Katla. This is the first secure record of the Askja 1875 tephra in the British Isles, which significantly extends its known spatial distribution and suggests a more complex dispersal pattern of this tephra than previously thought. Persistent presence of shards throughout parts of the peat sequences may reflect post-depositional movement of tephra shards within the peat, reworking from surrounding landscape, and/or sparse fallout from other eruptions. Our records indicate that any single peat core from this site gives a good approximation of the overall tephrostratigraphy, but there is considerable spatial variation in tephra concentrations between cores. Age-depth models for the six cores based on cryptotephras, spheroidal carbonaceous particle (SCP) counts, and radiocarbon dates likewise vary between cores, showing a pattern consistent with peat accumulation in a domed raised bog. These spatial differences in tephrostratigraphy highlight the value of a multiple-core approach in palaeoenvironmental peatland research.</div></div>","PeriodicalId":54516,"journal":{"name":"Quaternary Geochronology","volume":"86 ","pages":"Article 101647"},"PeriodicalIF":1.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Combined single grain and cobble luminescence dating of poorly bleached glaciofluvial deposits from the Swiss Alpine foreland","authors":"Elena Serra ,&nbsp;Daniela Mueller ,&nbsp;Lukas Gegg ,&nbsp;Gustav Firla ,&nbsp;Francesca Piccoli ,&nbsp;Stefan Hergarten ,&nbsp;Audrey Margirier ,&nbsp;Frank Preusser","doi":"10.1016/j.quageo.2025.101650","DOIUrl":"10.1016/j.quageo.2025.101650","url":null,"abstract":"<div><div>Constraining the age of glaciofluvial deposits is essential for reconstructing paleoglacial dynamics. While luminescence dating is among the most commonly used approaches, incomplete resetting of the signal before sediment deposition makes its application to such deposits challenging. Single grain (SG) and cobble luminescence dating have been used to account for heterogeneous bleaching with different success, and are tested here in combination on glaciofluvial deposits from one site in the northern Alpine foreland. Previous chronological investigations indicate that deposition of the proglacial outwash occurred ca. 29 ka ago. SG feldspar results on sand lens and gravel sandy matrix samples underestimate the previous age estimates due to the occurrence of grains with low equivalent dose (D_e) values. When low D_e values are discarded, the estimated ages are in agreement with the independent constraints. Luminescence-depth profiles obtained from four cobbles show (1) no or only shallow bleaching, and (2) high variability between cores and surfaces of the same clast. Both aspects highlight the necessity of measuring numerous clasts and several cores in order to detect well-bleached clasts and profiles. The limited signal resetting can be explained by the proximity of the deposit to the glacial front. The intra-cobble variability is instead potentially related to heterogeneity in the cobbles’ lithology, implying differences in dosimetry, signal stability and light attenuation within the clasts. Electron microprobe analyses of feldspar in the clasts and comparison with the independent age constraints suggest that (1) the luminescence signal of the rock slices derive from both Na- and K-rich feldspars and (2) an average internal potassium content may be a good first order estimate for dose rate calculations. Overall, the present study highlights both the challenges and the potential of applying SG and cobble luminescence dating to partially bleached glaciofluvial deposits.</div></div>","PeriodicalId":54516,"journal":{"name":"Quaternary Geochronology","volume":"87 ","pages":"Article 101650"},"PeriodicalIF":1.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Introduction to special issue LED 2023","authors":"Naomi Porat (Managing Guest Editor),&nbsp;Frank Preusser (Chief Editor)","doi":"10.1016/j.quageo.2024.101639","DOIUrl":"10.1016/j.quageo.2024.101639","url":null,"abstract":"","PeriodicalId":54516,"journal":{"name":"Quaternary Geochronology","volume":"85 ","pages":"Article 101639"},"PeriodicalIF":1.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143160658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Survival of the brightest? pIRIR dating of volcanic sediments in Sulawesi, Indonesia, using micro-aliquots of K-rich feldspar","authors":"Mariana Sontag-González ,&nbsp;Bo Li ,&nbsp;Kieran O'Gorman ,&nbsp;Basran Burhan ,&nbsp;Budianto Hakim ,&nbsp;Adam Brumm ,&nbsp;Richard G. Roberts","doi":"10.1016/j.quageo.2024.101638","DOIUrl":"10.1016/j.quageo.2024.101638","url":null,"abstract":"<div><div>Volcanic sediments are challenging to date with luminescence-based methods. Both main minerals used for dating—quartz and K-rich feldspar—commonly have suboptimal luminescence properties when of volcanic origins, primarily a low signal intensity and, for K-rich feldspars, high rates of anomalous fading. The present work provides a case study of sediment samples from the Leang Bulu Bettue (LBB) archaeological site in Indonesia, a key site in our understanding of the early human occupation of the island of Sulawesi. We show that currently available state-of-the-art methods can provide robust optical ages for volcanic sediments. Through various reliability tests, we establish the suitability of a post-IR IR stimulated luminescence (pIRIR) standardised growth curve (SGC) procedure for D_e estimation of ‘micro-aliquots’ containing 5–10 grains of K-rich feldspar, and then combine this method with estimates of environmental dose rate to determine 10 new reliable and finite optical ages for the sedimentary deposits at LBB. Furthermore, by applying the L_nT_n method to circumvent truncation of the D_e distribution caused by the non-linearity of the dose response curve in the higher dose range, we could extend the site's luminescence-based chronology to span the interval ∼15–210 ka. The new chronology is in keeping with previous radiocarbon and U-series ages for the site's upper layers. We show that the low fading rate of micro-aliquots relative to using large aliquots composed of hundreds of grains lies in a brightness-based selection. By targeting bright grains with low fading rates, the need for fading corrections is greatly reduced and they can be made with a smaller uncertainty propagated through into the final age estimate, resulting in optical ages of improved accuracy and precision for volcanic sediments.</div></div>","PeriodicalId":54516,"journal":{"name":"Quaternary Geochronology","volume":"85 ","pages":"Article 101638"},"PeriodicalIF":1.7,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel age constraints on offshore islets around Taiwan with implications for the northern Taiwan volcanic zone","authors":"Su-Chin Chang ,&nbsp;Mei-Fei Chu ,&nbsp;Wen-Shan Chen ,&nbsp;Stephen E. Cox ,&nbsp;Sidney R. Hemming","doi":"10.1016/j.quageo.2024.101636","DOIUrl":"10.1016/j.quageo.2024.101636","url":null,"abstract":"<div><div>Determining the exact age of volcanic activity in the Northern Taiwan Volcanic Zone (NTVZ) is essential for comprehending Taiwan's tectonic evolution. The timing and duration of the volcanic processes that formed the NTVZ remain uncertain despite the availability of geochronological, geochemical, and geophysical data. While extensive efforts have been directed towards investigating the age of the Tatun Volcanic Group, the primary feature of the NTVZ, many other aspects require further examination. This study concentrates on two offshore islets in the northern region of the NTVZ. We present new ⁴⁰Ar/³⁹Ar ages of 0.252 ± 0.018 Ma for a lava flow, representing an early stage of volcanic activity, and 0.118 ± 0.012 Ma for a dike, representing the latest stage of volcanic activity around Pengjia Islet. A sample collected from Mianhua Islet did not yield a reasonable age due to high uncertainty, likely attributable to young and low radiogenic argon. Field observations support the interpretation that volcanic activity on both islets is considerably younger than previously estimated. This study corroborates the hypothesis from geophysical studies that submarine NTVZ features to record a potentially active magmatic reservoir offshore of northern Taiwan. By refining our understanding of spatio-temporal patterns in volcanic activity, this study contributes to volcanic hazard assessment in Taiwan and surrounding areas.</div></div>","PeriodicalId":54516,"journal":{"name":"Quaternary Geochronology","volume":"85 ","pages":"Article 101636"},"PeriodicalIF":1.7,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of multiple-centers ESR dating to middle Pleistocene fluviolacustrine sediments and insights into the dose underestimation from the Ti–H center at high equivalent doses","authors":"Xingshuo Xu ,&nbsp;Chuanyi Wei ,&nbsp;Gongming Yin ,&nbsp;Hao Ji ,&nbsp;Chunru Liu ,&nbsp;Lin Zhao ,&nbsp;Huili Yang ,&nbsp;Guang Yang","doi":"10.1016/j.quageo.2024.101635","DOIUrl":"10.1016/j.quageo.2024.101635","url":null,"abstract":"<div><div>The Ti–H center exhibits rapid and complete optical bleaching properties, meaning it has significant potential for dating applications. However, the equivalent dose of Ti–H centers is underestimated when total doses received by quartz during its geological history reaches a higher level, and there appears to be linked to saturation of the equivalent dose obtained from Ti–H centers. To investigate this phenomenon, a series of samples were analyzed from two sections at Ximachi in Heqing County, China, which have strong Ti–H signals. The sample ages were obtained using the electron spin resonance (ESR) multiple-centers approach, and the reliability of the ages was validated by comparison with optically simulated luminescence (OSL) ages and between different paramagnetic centers. The ESR data demonstrate that the Ti–H centers can provide accurate dose estimates up to 750–950 Gy, with varying degrees of underestimation at high doses. Combined with previously published Ti–H data, it is evident that the upper threshold of the accurate data obtained from Ti–H centers depends on the sample, and may be positively correlated with the Ti–H/(Ti–Li + Ti–H) ratio (option C/D). According to the provenance significance of the Ti–H/(Ti–Li + Ti–H) ratio, we propose that the Ximachi samples have high Ti–H/(Ti–Li + Ti–H) ratios and then equivalent dose saturation values of Ti–H centers, which may be related to the thermal history of the analyzed quartz grains.</div></div>","PeriodicalId":54516,"journal":{"name":"Quaternary Geochronology","volume":"85 ","pages":"Article 101635"},"PeriodicalIF":1.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A method to date rock engravings using luminescence – tested at Murujuga, Western Australia","authors":"Luke A. Gliganic ,&nbsp;Jo McDonald ,&nbsp;Caroline Mather ,&nbsp;Lloyd T. White","doi":"10.1016/j.quageo.2024.101633","DOIUrl":"10.1016/j.quageo.2024.101633","url":null,"abstract":"<div><div>Rock engravings are globally ubiquitous, provide evidence for symbolic behaviours, and demonstrate connections to country and the desire to communicate with other humans. However, rock engravings have proven difficult to date. The development of luminescence rock surface dating approaches has the potential to address this deficiency in applicable dating techniques. Specifically, luminescence rock surface exposure dating methods can be used to tell how long a rock surface has been exposed to sunlight, thus providing a potential avenue to date rock engravings. Here, we present results from laboratory and field bleaching experiments from the Murujuga rock art complex in Western Australia. Four major art-bearing lithologies are petrographically characterised and tested for useable luminescence signals. Three bleaching experiments are conducted: two in the laboratory and one at the study area. The gabbro and microgranite lithologies are shown to be bleachable and show potential for rock surface burial dating. The microgranite can be used to accurately estimate exposure duration over the timescales tested in all experiments, demonstrating promising potential to date rock engravings.</div></div>","PeriodicalId":54516,"journal":{"name":"Quaternary Geochronology","volume":"85 ","pages":"Article 101633"},"PeriodicalIF":1.7,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analyzing complex single grain feldspar equivalent dose distributions for luminescence dating of glacially derived sediments","authors":"Gustav Firla ,&nbsp;Christopher Lüthgens ,&nbsp;Stephanie Neuhuber ,&nbsp;Clemens Schmalfuss ,&nbsp;Ernst Kroemer ,&nbsp;Frank Preusser ,&nbsp;Markus Fiebig","doi":"10.1016/j.quageo.2024.101627","DOIUrl":"10.1016/j.quageo.2024.101627","url":null,"abstract":"<div><div>Overdeepened valleys are structures scoured into the underlying substrate by glaciers that have been subsequently filled with sediment, which recorded the environmental history of the adjacent landscape. Investigated here is an overdeepened structure that was formed beneath the Salzach Paleoglacier west of Freilassing, Bavaria (southern Germany). In a previous study, infinite infrared stimulated luminescence (IRSL) ages have been determined for the lower part of the core using a multi-grain approach. Applying single-grain feldspar luminescence dating allows to identify the unsaturated signals, previously masked by multi-grain signal averaging. Identification of the normally distributed leading edge in equivalent dose (D_e) distributions allows for the dismissal of low value D_e (LOVED) grains that appear to reflect underestimating outliers. Measurement of eleven samples distributed along the entire length of the core yielded two distinct age clusters, for which fading corrected IRSL₅₀ and uncorrected pIRIR₂₂₅ ages agree within uncertainties. Whereas the younger age cluster at the top of the sequence is attributed to Marine Isotope Stage (MIS) 3, the older age cluster is assigned to MIS 6. It is shown that single grain pIRIR measurements will allow to resolve the infill chronology of overdeepened structures in the Alps, at least for the last ca. 200 ka. Overall, the present study represents a further step towards understanding and handling complex D_e distributions often encountered in single grain feldspar luminescence dating. This contributes to better understand the frequently observed age offset between single grain and single-aliquot measurements.</div></div>","PeriodicalId":54516,"journal":{"name":"Quaternary Geochronology","volume":"85 ","pages":"Article 101627"},"PeriodicalIF":1.7,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142428163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards accurate modelling of rock surface exposure dating using luminescence to estimate post-exposure erosion rate","authors":"Arbaz N. Pathan ,&nbsp;Rabiul H. Biswas ,&nbsp;Benjamin Lehmann ,&nbsp;Georgina E. King ,&nbsp;Frédéric Herman","doi":"10.1016/j.quageo.2024.101634","DOIUrl":"10.1016/j.quageo.2024.101634","url":null,"abstract":"<div><div>Depth-dependent luminescence in the top few millimetres of rock surface emerges as a potential tool to estimate rock surface exposure age and post-exposure erosion rate. It relies on the principle that the luminescence depth profile (LDP) propagates deeper with the time of sunlight exposure and moves to shallower depth with the erosion rate. The propagation of LDP is generally assumed to follow the first-order kinetic (FOK) model, except for a few recent studies. The FOK model predicts an exponential decay of infrared stimulated luminescence (IRSL) signal with light exposure time, which rarely corroborates experimental observation; IRSL signal decay is much slower than exponential decay. The faster decay of IRSL, predicted by the FOK model, results in faster propagation of LDP and thus always underestimates the exposure age and translates into a higher erosion rate. Interestingly, the slower-than-exponential decay of the IRSL signal can be better explained by general order kinetics (GOK). Thus, recent studies on rock surface luminescence dating have employed the GOK model. However, the GOK model is yet to be explored to predict post-exposure erosion rates. Here, we apply the GOK model and theoretically demonstrate the impact of the order of kinetics on the calibration and propagation of LDP in the presence of erosion and how the LDP's transient to steady state transition depends on the order of kinetics. We have performed a series of synthetic tests to assess the impact of selecting an incorrect model on the prediction of erosion rate. Finally, using the revised rate equation, the erosion rates are recalculated for natural samples (data available in the literature: Lehmann et al. (2019b)) and the impact of GOK on the predicted erosion rate is discussed.</div></div>","PeriodicalId":54516,"journal":{"name":"Quaternary Geochronology","volume":"85 ","pages":"Article 101634"},"PeriodicalIF":1.7,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142428164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}