-
Infrared radiofluorescence (IR-RF) dating: A review Quat. Geochronol. (IF 3.079) Pub Date : 2021-02-18 Madhav Krishna Murari; Sebastian Kreutzer; Georgina King; Marine Frouin; Sumiko Tsukamoto; Christoph Schmidt; Tobias Lauer; Nicole Klasen; Daniel Richter; Johannes Friedrich; Norbert Mercier; Markus Fuchs
Luminescence dating methods on natural minerals such as quartz and feldspars are indispensable for establishing chronologies in Quaternary Science. Commonly applied sediment dating methods are optically stimulated luminescence (OSL) and infrared stimulated luminescence (IRSL). In 1999, Trautmann et al. (1999a, b) proposed a new related technique called infrared radiofluorescence (IR-RF). IR-RF denotes
-
A new method for dating the surface exposure age of granite rock walls in the Mont Blanc massif by reflectance spectroscopy Quat. Geochronol. (IF 3.079) Pub Date : 2021-02-13 Xavi Gallach; Yves Perrette; Dominique Lafon; Émilie Chalmin; Philip Deline; Ludovic Ravanel; Julien Carcaillet; Tanguy Wallet
In the high mountain rock walls of the Mont Blanc massif, changes in the granite surface colour are related to its exposure age. The light grey colour of fresh rock surfaces turns orange when is long exposed to weathering. In order to study this colour/age relationship, reflectance spectroscopy was performed on 73 samples, and Terrestrial Cosmogenic Nuclide (TCN) dating was used to obtain their surface
-
Radiocarbon dating distal tephra from the Early Bronze Age Avellino eruption (EU-5) in the coastal basins of southern Lazio (Italy): Uncertainties, results, and implications for dating distal tephra Quat. Geochronol. (IF 3.079) Pub Date : 2021-02-05 J. Sevink; C.C. Bakels; R.L. van Hall; M.W. Dee
Distal tephra from the major Somma-Vesuvius Avellino (AV) eruption is widespread in the coastal basins of Southern Lazio (Central Italy). Dated to 1995 ± 10 cal yr BC in 2011, later on doubts arose about the reliability of this frequently cited age. This led to a major effort to date AV tephra holding sections, based on a thorough methodological approach. Various aspects were studied to identify sections
-
Chronostratigraphy of a 270-ka sediment record from Lake Selina, Tasmania: Combining radiometric, geomagnetic and climatic dating Quat. Geochronol. (IF 3.079) Pub Date : 2021-01-20 Agathe Lisé-Pronovost; Michael-Shawn Fletcher; Quentin Simon; Zenobia Jacobs; Patricia S. Gadd; David Heslop; Andy I.R. Herries; Yusuke Yokoyama; Aster team
Lake sediment archives covering several glacial cycles are scarce in the Southern Hemisphere and they are challenging to date. Here we present the chronostratigraphy of the oldest continuous lake sediment archive in Tasmania, Australia; a 5.5 m and 270 ka (Marine Isotope Stage 8) sediment core from Lake Selina. We employ radiometric dating (radiocarbon and optically stimulated luminescence) and relative
-
Fine-tuning of 210Pb-based methods for dating vegetated saltmarsh sediments Quat. Geochronol. (IF 3.079) Pub Date : 2021-01-23 A.R. Iurian; G. Millward; W. Blake; J.M. Abril Hernández
Saltmarshes, wetlands, inter-tidal mudflats are highly productive natural ecosystems with significant ecological value. 210Pb and 137Cs have been used for establishing chronologies at a centennial scale in these sediments. They are relevant for assessing how saltmarshes are vulnerable to climate change, natural hazards and contamination from human inputs. This paper aims to review and adapt existing
-
ESR/U-series and ESR dating of several Middle Pleistocene Italian sites: Comparison with 40Ar/39Ar chronology Quat. Geochronol. (IF 3.079) Pub Date : 2021-01-19 Jean-Jacques Bahain; Pierre Voinchet; Amina Vietti; Qingfeng Shao; Olivier Tombret; Alison Pereira; Sébastien Nomade; Christophe Falguères
The stratigraphic sequences of numerous Palaeolithic sites of Central and Southern Italy, very rich in both archaeological and palaeontological remains, have also recorded Pleistocene volcanic events through volcanic ash deposits (tephra). They allow the establishment of an accurate chronological framework by comparing results obtained by 40Ar/39Ar dating method on single volcanic K-feldspar crystals
-
Dendrogeomorphic dating vs. low-magnitude landsliding Quat. Geochronol. (IF 3.079) Pub Date : 2021-01-11 Andrea Fabiánová; Vladimír Chalupa; Karel Šilhán
Landsliding is a major natural hazard; therefore, understanding its activity is an important objective worldwide. For the investigation of the current landslide events, dendrogeomorphic methods are commonly used as they allow quite a precise dating of individual events. Nevertheless, there is still a question of whether dendrogeomorphic methods can successfully work for landslides with low-magnitude
-
Sediment dating using Infrared Photoluminescence Quat. Geochronol. (IF 3.079) Pub Date : 2021-01-05 Raju Kumar; Myungho Kook; Mayank Jain
Infrared photoluminescence (IRPL) is a Stokes-shifted emission arising from radiative relaxation of the excited state of the principal dosimetric tap in feldspar. Recent investigations have revealed that there exist two IRPL emissions at 880 nm and 955 nm (for excitation using 830 nm laser). Since IRPL does not depend on the recombination centers, the signal can be read out non-destructively; this
-
Application of multiple dating techniques to the Holocene sediments of Angrenjin Co in the southern Tibetan Plateau Quat. Geochronol. (IF 3.079) Pub Date : 2020-12-19 Deke Xu; Houyuan Lu; Chunsheng Jin; Zhaoyan Gu; Xinxin Zuo; Yajie Dong; Can Wang; Luo Wang; Hao Li; Yinghao Yu; Yingyu Jin; Naiqin Wu
The production of high-resolution and accurate age models for lake sediments in the Tibetan Plateau (TP) is a prerequisite for subsequent paleoclimatic studies. However, Holocene lake sedimentary records with high-quality age controls from the TP are extremely scarce. Here we present the results of a comparative study of the results of the application of multiple dating techniques (14C, 210Pb, 137Cs)
-
Impact of hydrological conditions on the radiocarbon reservoir effect in lake sediment 14C dating: the case of Kusai Lake on the northern Qinghai-Tibet Plateau Quat. Geochronol. (IF 3.079) Pub Date : 2020-12-23 Qi Zhang; Xingqi Liu; Huashu Li
The hydrological conditions of a lake system strongly influence the reservoir effect in the radiocarbon dating of endogenic organic and inorganic carbon in lake sediments. In this paper, we compare 14C dating with varve counting results for cores from Kusai Lake to determine the temporal changes in 14C reservoir ages during the last 2000 years. Based on the 14C budget equation for a lake system, the
-
Refined dating using palaeomagnetic secular variations on a lake sediment core from Guozha Co, northwestern Tibetan Plateau Quat. Geochronol. (IF 3.079) Pub Date : 2020-12-07 Can-Ge Li; Yan Zheng; Mingda Wang; Zhe Sun; Chunsheng Jin; Juzhi Hou
Lake sediments are widely applied to investigate palaeoclimatic and palaeoenvironmental changes on the Tibetan Plateau (TP). Radiocarbon dating of various materials is one of the most commonly used methods to constrain the timing of lake sediment deposition, but it is problematic for most lakes on the TP due to carbon reservoir effects. Because palaeomagnetic secular variations (PSV) share similar
-
Synthesized luminescence ages of palaeo-beach ridges in Krishna–Godavari twin delta plain, east coast of India Quat. Geochronol. (IF 3.079) Pub Date : 2020-12-13 P. Morthekai; Kakani Nageswara Rao; K. Ch.V. Nagakumar; G. Demudu; H.M. Rajapara; D.V. Reddy
Luminescence ages of eight sandy beach-ridge samples from the Krishna–Godavari delta region on the east coast of India were obtained by synthesizing ages based on three luminescence signals, i.e., optically stimulated luminescence (OSL) from quartz, infrared stimulated luminescence (IRSL), and post-infrared (pIR) IRSL290°C from feldspar. Standard statistical procedures and hierarchical Bayesian modeling
-
Extending the age limit of quartz OSL dating of Chinese loess using a new multiple-aliquot regenerative-dose (MAR) protocol with carefully selected preheat conditions Quat. Geochronol. (IF 3.079) Pub Date : 2020-11-30 Xulong Wang; Jun Peng; Grzegorz Adamiec
Optically Stimulated Luminescence (OSL) dating on quartz is well established following the introduction of the Single-Aliquot Regenerative-dose (SAR) protocol. Despite its widespread use, it has a major drawback in frequently underestimating the age of samples with equivalent dose (De) larger than ~120 Gy. In this study, we investigate fine-grained quartz extracted from Chinese loess with fairly well
-
New fission-track ages of australasian tektites define two age groups: Discriminating between formation and reset ages Quat. Geochronol. (IF 3.079) Pub Date : 2020-11-27 John A. Westgate; Bradley J. Pillans; Brent V. Alloway; Nicholas J.G. Pearce; Peter Simmonds
In this study tektites from across the Australasian strewn field (specifically, mainland Australia, Tasmania, Java, Malaysia) have been dated by the fission-track method. Twelve tektites from 9 localities define two age groups: one has a weighted mean age of 822 ± 20 ka based on 12 age determinations, and the other is 655 ± 20 ka based on 10 age determinations. The older group represents formation
-
The use of carbon isotopes (13C,14C) in different soil types and vegetation coverage in a montane atlantic forest region, Southeast Brazil Quat. Geochronol. (IF 3.079) Pub Date : 2020-11-05 Renata M. Jou; Kita D. Macario; Luiz C. Pessenda; Marcos Gervasio Pereira; Flávio L. Lorente; Renan Pedrosa; Eduardo Carvalho da Silva Neto; Stewart Fallon; Marcelo C. Muniz; Renan P. Cardoso; João P.S. Felizardo; Roberto M. dos Anjos
The study of the paleoenvironment depends upon proxies of palaeovegetation associated with chronological records. Carbon stable isotopes in soil samples provide information on the past vegetation type due to differences in mass fractionation during photosynthesis. Radiocarbon measurements on soil organic matter may also have different behaviors, given the complexity of soils as mixtures of multiple
-
The first Holocene varve chronology for the UK: Based on the integration of varve counting, radiocarbon dating and tephrostratigraphy from Diss Mere (UK) Quat. Geochronol. (IF 3.079) Pub Date : 2020-11-17 Celia Martin-Puertas; Amy A. Walsh; Simon P.E. Blockley; Poppy Harding; George E. Biddulph; Adrian Palmer; Arne Ramisch; Achim Brauer
The British Isles lack long high-precision and independent chronologies to reconstruct Holocene environmental and climatic conditions at sub-decadal timescales. This paper reports the first Holocene varved chronology for the lacustrine sediment record of Diss Mere in the UK. The record of Diss Mere is 15 m long, and shows 4.2 m of finely-laminated sediments, which are present between ca. 9 and 13 m
-
Assessing the intra-crystalline approach to amino acid geochronology of Neogloboquadrina pachyderma (sinistral) Quat. Geochronol. (IF 3.079) Pub Date : 2020-10-23 Lucy J. Wheeler; Kirsty E.H. Penkman; Hans Petter Sejrup
While amino acid (AA) geochronology has been widely applied to foraminiferal biomineral proteins, there has been limited assessment of the potential of isolating an ‘intra-crystalline’ fraction of proteins to improve the reliability of AA geochronology for foraminifera. In this study, bleaching experiments were carried out on the foraminifer Neogloboquadrina pachyderma (sinistral) from an independently
-
Sequence modeling in zircon double-dating of early Holocene Mt. Erciyes domes (Central Anatolia) Quat. Geochronol. (IF 3.079) Pub Date : 2020-10-11 Bjarne Friedrichs; Gokhan Atıcı; Martin Danišík; Esra Yurteri; Axel K. Schmitt
-
Spatial dendrogeomorphic sampling based on the specific tree growth responses induced by the landslide mechanism Quat. Geochronol. (IF 3.079) Pub Date : 2020-10-24 Karel Šilhán
The knowledge of spatial distribution of landslide events is crucial from forest management, landscape planning or hazard assessment point of view. Dendrogeomorphic approaches are actually a suitable tool for construction of past landslide behaviour due to known position of sampled trees. The position of trees on the landslide surface can influence the detection of the spatial patterns of landslide
-
Marine reservoir corrections for the Caribbean demonstrate high intra- and inter-island variability in local reservoir offsets Quat. Geochronol. (IF 3.079) Pub Date : 2020-10-07 Robert J. DiNapoli; Scott M. Fitzpatrick; Matthew F. Napolitano; Torben C. Rick; Jessica H. Stone; Nicholas P. Jew
The abundance of marine mollusks found in Pre-Columbian archaeological sites in the Caribbean has made them enticing sample types for radiocarbon dating. Unfortunately, a paucity of local marine reservoir corrections (ΔR) for most of the region limits building chronologies using marine-based carbonates. Here we present a suite of 33 new ΔR values for 22 islands in both the Greater and Lesser Antilles
-
Cross-comparison of last glacial radiocarbon and OSL ages using periglacial fan deposits Quat. Geochronol. (IF 3.079) Pub Date : 2020-10-08 Sanne W.L. Palstra; Jakob Wallinga; Willem Viveen; Jeroen M. Schoorl; Meindert van den Berg; Johannes van der Plicht
Two cores from a Weichselian periglacial alluvial fan were dated using 14C and OSL, to verify the reliability of both methods and check the upper dating limit of the 14C method. Both dating methods yielded a similar chronology for core Eerbeek-I, with infinite 14C dates for the lower part where OSL dates indicated ages of over 45 ka. Finite 14C dates were obtained throughout the core for Eerbeek-II
-
U-series dating of carbonate accretions reveals late Neolithic age for the rock paintings in Cangyuan, southwestern China Quat. Geochronol. (IF 3.079) Pub Date : 2020-09-28 Qingfeng Shao; Yun Wu; Edwige Pons-Branchu; Qian Zhu; Arnaud Dapoigny; Tingyun Jiang
The ancient rock paintings drawn with ochre on the limestone cliffs at 15 sites in Cangyuan County, in southwestern China, contain more than 1200 identifiable figures. The paintings portray scenes of daily life in a remote mountainous area. The inhabitants probably led a sedentary life of animal herding and cultivation and in the scenes they are engaged in activities such as dancing, hunting and fighting
-
Assessing the feasibility of the 228Th/228Ra dating method for young corals (<10 a) by gamma spectrometry Quat. Geochronol. (IF 3.079) Pub Date : 2020-09-24 Wuhui Lin; Kefu Yu; Yinghui Wang; Xinming Liu; Shendong Xu; Binyuan He; Qiuyun Ning; Yinghua Li; Fangfang Deng; Jianjun Wang; Hao Ma
Radioactive isotopes are extremely useful for determining the age of corals, which can also provide extremely useful archives of past climate change and environmental pollution. In this study, we present a novel approach for dating young corals (<10 a), by applying the 228Th/228Ra method. 228Th/228Ra disequilibrium was widely observed in a variety of coral genera, from the fringing reefs to atoll reefs
-
Improved pretreatment method for the isolation and decontamination of pyrogenic carbon for radiocarbon dating using hydrogen pyrolysis Quat. Geochronol. (IF 3.079) Pub Date : 2020-09-17 Theresa J. Orr; Christopher M. Wurster; Vladimir Levchenko; Philippa L. Ascough; Michael I. Bird
Pyrogenic carbon (charcoal, black carbon, elemental carbon) is one of the most common materials used for radiocarbon dating of terrestrial samples. However, exogenous carbon contamination can compromise the accuracy of radiocarbon ages. This study presents the results of two chemical pretreatments prior to hydrogen pyrolysis (hypy) as improved protocols for the isolation and decontamination of pyrogenic
-
Calibration of a QEM-EDS system for rapid determination of potassium concentrations of feldspar grains used in optical dating Quat. Geochronol. (IF 3.079) Pub Date : 2020-09-10 Kieran O'Gorman; Frank Brink; Dominique Tanner; Bo Li; Zenobia Jacobs
Potassium (K)-rich feldspars are one of two mineral types typically used for optical dating. Feldspar grains can contain up to ~14 wt% K that gives rise to an internal dose rate component. This internal component can comprise a significant proportion of the total environmental dose rate to which a mineral grain is exposed. The environmental dose rate term—the denominator in the optical age equation—determines
-
Quaternary evolution of the Golo river alluvial plain (NE Corsica, France) Quat. Geochronol. (IF 3.079) Pub Date : 2020-09-03 Stéphane Molliex, Gwenael Jouet, Pierre-Henri Blard, Julien Moreau, Julie Demartini, Joep E.A. Storms, Claude Vella, Aster Team
The Golo River drains a steep catchment (average gradient of 30 m km−1, surface of 1214 km2) in the northeast part of Corsica Island, delivering sediments to the Ligurian Sea. In this study, we review and revise the geologic map and constrain the extent of the Golo coastal alluvial plain formations and their relative and absolute chronology. To update the surface extent of each formation, we performed
-
Loess deposits in southern Tajikistan (Central Asia): Magnetic properties and paleoclimate Quat. Geochronol. (IF 3.079) Pub Date : 2020-08-19 Nazarov Parviz, Zhongshan Shen, Mamadjanov Yunus, Sajid Zulqarnain
The continental accumulation of dust during the Quaternary led to the formation of widespread loess deposits in southern Tajikistan. In this area, the accumulation of loess is commonly associated with the occurrence of dust storms and the widespread distribution of loess provides evidence of dust storms becoming more frequent in arid Central Asia at least since the Early Pleistocene. Southern Tajikistan
-
An exploration of the utility of speleothem age distributions for palaeoclimate assessment Quat. Geochronol. (IF 3.079) Pub Date : 2020-08-01 Rieneke Weij, Jon Woodhead, John Hellstrom, Kale Sniderman
Age distributions of speleothem growth frequency are often employed as proxies for past climate variation. However, their interpretation can be influenced by many variables such as the type of probability density estimator used, the number of samples studied, and indeed the nature of the sampling itself. In order to explore the utility of speleothem age distributions in this context, we constructed
-
Combined U-series dating of cave pearls and mammal fossils: Constraint on the age of a late middle pleistocene Ailuropoda–Stegodon fauna from the Diaozhongyan Cave, Guangxi, South China Quat. Geochronol. (IF 3.079) Pub Date : 2020-07-23 Wei Liao, Yue-xing Feng, Jian-xin Zhao, Ting-yun Jiang, Yan-yan Yao, Hua Liang, Ai Duc Nguyen, Christopher J. Bae, Wei Wang
To extend the range of materials that can be used to provide chronological constraint in archaeological and palaeontological settings, we explore the use of cave pearls that form in shallow pools. Here, we present U-series dating results of cave pearls found in cave sediments with mammal fossils collected from systematic excavations at the Diaozhongyan Cave (“DZY”), located in Guangxi Zhuang Autonomous
-
Comparison of sample preparation procedures for mortar radiocarbon dating. Case study of Irulegi Castle (Navarre, Spain) Quat. Geochronol. (IF 3.079) Pub Date : 2020-07-17 Graciela Ponce-Antón, Alf Lindroos, Åsa Ringbom, Luis Angel Ortega, Maria Cruz Zuluaga, Irka Hajdas, Jesper Olsen, Juantxo Agirre Mauleon
A comparison of two different mechanical separation procedures, a settling process and sieving process, was performed in the samples preparation for radiocarbon dating of archaeological lime mortars from the Tower Keep at Irulegi Castle (Navarre, Spain). The different fractions obtained by the two different mechanical separation procedures were converted to carbon dioxide by sequential dissolution
-
The freshwater reservoir effect in northern West Siberia: 14C and stable isotope data for fish from the late medieval town of Mangazeya Quat. Geochronol. (IF 3.079) Pub Date : 2020-07-04 Yaroslav V. Kuzmin, Pavel A. Kosintsev, Mathieu Boudin, Elya P. Zazovskaya
The freshwater reservoir effect (FRE) was estimated for the northern part of West Siberia for the first time, based on securely dated samples from the late medieval town of Mangazeya existed mainly in AD 1601–1650. Twelve specimens of six species of freshwater fish were selected for 14C dating, and C and N stable isotopes analysis. The FRE varies from ca. 310 to ca. 1970 14C years, and there is no
-
The utility of single foraminifera amino acid racemization analysis for the relative dating of Quaternary beach barriers and identification of reworked sediment Quat. Geochronol. (IF 3.079) Pub Date : 2020-06-30 Deirdre D. Ryan, Terry J. Lachlan, Colin V. Murray-Wallace, David M. Price
The identification and correlation of a sequence of Pleistocene beach barriers located within the northern Coorong Coastal Plain, South Australia, is made difficult by long-term subsidence and extensive reworking. Associated shell beds, to all but the last interglacial barrier, are subsurface and not readily accessible. The whole-rock amino acid racemization method was found to be unsuitable for distinguishing
-
Downcore variations of carbon reservoir ages linked to lake level changes in northwest China Quat. Geochronol. (IF 3.079) Pub Date : 2020-06-27 Bowen Meng, Aifeng Zhou, Yancheng Zhang, Mu Song, Weiguo Liu, Zhouqing Xie, Shenghua Li, Zhonghui Liu
Lacustrine sediments provide an excellent opportunity to study climate change beyond the instrumental period and further to elucidate its intrinsic interactions with ecosystem. However, the radiocarbon (14C)-based chronological framework of such natural archives, on which robust interpretation of geochemical proxies primarily depends, is commonly challenged due to the difficulty in properly correcting
-
Modelling heterogeneously bleached single-grain equivalent dose distributions: Implications for the reliability of burial dose determination Quat. Geochronol. (IF 3.079) Pub Date : 2020-06-26 Jun Peng, Bo Li, Zenobia Jacobs
In optical dating, incomplete and heterogeneous resetting (“bleaching”) of the luminescence signal measured from mineral grains since the last episode of transport and deposition is commonly observed for sedimentary samples. As a result, different grains could have different equivalent dose (De) values at the time of deposition. For such samples, statistical treatment of the De distribution is required
-
Characteristics of palaeosalinity and palaeoredox records in sediment from Dali Lake: Climate change in North China from 0 to 2100 cal BP Quat. Geochronol. (IF 3.079) Pub Date : 2020-06-26 Zhilei Zhen, Wenbao Li, Lishuai Xu, Chunling Wang, Linting Zhao
To understand the salinity, redox characteristics, and climatology of Dali Lake during the late Holocene, we analysed trace element records from a high-resolution sediment core (DL-1), including Al, Mn, Zn, Mo, Pb, Fe, Sr, and Ba. The core was dated to 2100 cal BP based on accelerator mass spectrometry (AMS) 14C dating combined with the constant rate of supply (CRS) model. We identified five palaeoclimatic
-
Comparing classical and Bayesian 210Pb dating models in human-impacted aquatic environments Quat. Geochronol. (IF 3.079) Pub Date : 2020-06-26 Marco A. Aquino-López, Ana Carolina Ruiz-Fernández, Maarten Blaauw, Joan-Albert Sanchez-Cabeza
-
Establishing standardised growth curves (SGCs) for OSL signals from individual grains of quartz: A continental-scale case study Quat. Geochronol. (IF 3.079) Pub Date : 2020-06-26 Xiao Fu, Bo Li, Zenobia Jacobs, Nathan R. Jankowski, Tim J. Cohen, Richard G. Roberts
The standardised growth curve (SGC) procedure is a technique that can facilitate rapid De estimation. In this study, we apply a least-squares (LS) normalisation procedure to single grains of quartz from multiple sites across Australia to test its applicability for establishing common SGCs for individual quartz grains from the same continent. Seventy-two samples from 18 sites were divided into two groups:
-
Exploring complexity in luminescence dating of quartz and feldspars at the Middle Stone Age site of Mwulu's cave (Limpopo, South Africa) Quat. Geochronol. (IF 3.079) Pub Date : 2020-05-29 J.K. Feathers, M. Evans, D.J. Stratford, P. de la Peña
Luminescence dating is applied to sediments from Mwulu's Cave, whose lithics have been typologically considered Middle Stone Age (MSA) and have been previously assigned to what is called the Pietersburg industry. This industry is, however, poorly defined both chronologically and typologically. Luminescence methods were applied to both quartz and potassium feldspars by two different laboratories. Age
-
Challenges and limitations of the 210Pb sediment dating method: Results from an IAEA modelling interlaboratory comparison exercise Quat. Geochronol. (IF 3.079) Pub Date : 2020-05-29 M. Barsanti, R. Garcia-Tenorio, A. Schirone, M. Rozmaric, A.C. Ruiz-Fernández, J.A. Sanchez-Cabeza, I. Delbono, F. Conte, J.M. De Oliveira Godoy, H. Heijnis, M. Eriksson, V. Hatje, A. Laissaoui, H.Q. Nguyen, E. Okuku, Saber A. Al-Rousan, S. Uddin, M.W. Yii, I. Osvath
The 210Pb sediment dating is the most widely used method to determine recent (~100–150 years) chronologies and sediment accumulation rates in aquatic environments and has been used effectively for reconstruction of diverse environmental processes associated with global change. Owing to the relative accessibility of the 210Pb methodology, many environmental chronologies have been produced, but not always
-
A comparison of multiple luminescence chronometers at Voordrag, South Africa Quat. Geochronol. (IF 3.079) Pub Date : 2020-05-28 D. Colarossi, G.A.T. Duller, H.M. Roberts, S. Tooth, G.A. Botha
A suite of 10 samples collected from an 11 m thick colluvial sequence at Voordrag, KwaZulu-Natal, South Africa, have been used to undertake a comparison of different luminescence methods. Good agreement is found between single grain quartz optically stimulated luminescence (OSL) and single grain K-feldspar post-infrared infrared-stimulated luminescence (post-IR IRSL) ages, with the exception of the
-
Mimicking the effects of anthropogenic heating on amino acid racemisation dating of gastropod shells Quat. Geochronol. (IF 3.079) Pub Date : 2020-05-11 José E. Ortiz, Yolanda Sánchez-Palencia, Igor Gutiérrez-Zugasti, Trinidad Torres, Manuel González-Morales
Pre- or post-depositional heating of fossil biominerals will impact resulting amino acid dates, but the study on the effects on their amino acids of dry artificial heating of molluscs has not yet been fully tested. Here we report a study on three mollusc species to show how amino acid content can potentially be used to identify archaeological samples that have been subjected to artificial heating.
-
Chronology of young basalt flows from lava tube gypsum U-series ages Quat. Geochronol. (IF 3.079) Pub Date : 2020-05-11 Victor J. Polyak, Julian R. Dillon, Yemane Asmerom, Bogdan P. Onac
Basaltic lavas provide a window into their mantle sources and the associated geodynamic processes associated with them. Obtaining absolute chronology on young basalt flows is often challenging. Some gypsum crusts in pyro-duct (lava tube) caves crystallize during the last “cooling” stages of tube formation probably at relatively low temperatures (i.e., <100 °C). Here we propose uranium-series dating
-
Do Bayesian methods lead to more precise chronologies? ‘BayLum’ and a first OSL-based chronology for the Palaeolithic open-air site of Mirak (Iran) Quat. Geochronol. (IF 3.079) Pub Date : 2020-04-21 Maryam Heydari, Guillaume Guérin, Sebastian Kreutzer, Guillaume Jamet, Mohammad Akhavan Kharazian, Milad Hashemi, Hamed Vahdati Nasab, Gilles Berillon
Bayesian inference has been applied extensively to chronologies in archaeological science since it provides several advantages over the (classic) frequentist approach. One of the most important aspects of applying Bayesian methods is their capacity to consider the stratigraphic relationship between ages. In luminescence dating, a crucial motivation for applying Bayesian modelling is the ability to
-
Chronostratigraphy of a 1.5±0.1 Ma composite sedimentary record from Colônia basin (SE Brazil): Bayesian modeling based on paleomagnetic, authigenic 10Be/9Be, radiocarbon and luminescence dating Quat. Geochronol. (IF 3.079) Pub Date : 2020-04-19 Quentin Simon, Marie-Pierre Ledru, André Oliveira Sawakuchi, Charly Favier, Thays D. Mineli, Carlos H. Grohmann, Marco Guedes, Edouard Bard, Nicolas Thouveny, Marta Garcia, Kazuyo Tachikawa, Paula A. Rodríguez-Zorro
We present a new 52 m composite record (COL17c) composed of five sedimentary sequences retrieved from the Colônia basin (Southeastern Brazil). The COL17c record is composed of two main sub-units deposited under different regimes: a peatland above ~14 m and lacustrine sediments below. Sedimentary description and core scanning (MSCL and XRF) are first used to align individual cores in order to produce
-
Testing quartz and feldspar luminescence dating to determine earthquake and tsunami recurrence in the area of the giant 1960 Chile earthquake Quat. Geochronol. (IF 3.079) Pub Date : 2020-04-15 Dominik Brill, Marco Cisternas
Coasts on active subduction zones are recurrently affected by great earthquakes and associated tsunamis. Deposits resulting from both tidal inundation after coseismic subsidence and from tsunamis can be radiocarbon dated to infer patterns of earthquake and tsunami recurrence. Yet, finding suitable plant material for radiocarbon dating is not always easy. Luminescence dating provides a more ubiquitously
-
Radiocarbon analysis confirms annual periodicity in Cedrela odorata tree rings from the equatorial Amazon Quat. Geochronol. (IF 3.079) Pub Date : 2020-04-08 Guaciara M. Santos, Daniela Granato-Souza, Ana Carolina Barbosa, Rose Oelkers, Laia Andreu-Hayles
A Cedrela odorata tree ring width chronology spanning from 1786 to 2016 was developed in the quasi-equatorial eastern Amazon Basin. Annual calendar dates were assigned using dendrochronological techniques at the Federal University of Lavras, Brazil. Due to its strategic location at the edge of the Equator (approximately 0°57′S), an independent confirmation of the annual periodicity of this century-long
-
Change is the only constant - time-dependent dose rates in luminescence dating Quat. Geochronol. (IF 3.079) Pub Date : 2020-03-31 Detlev Degering, Albrecht Degering
Time-dependent changes in dose rates generally need to be considered in luminescence dating due to the dynamic character of the geosphere. Nevertheless, this aspect is rather marginally treated in the literature. The present paper describes the methodology of including temporal variations of overburden, moisture content and radionuclide activity into the calculation of dating results. Consideration
-
Combined unsteady denudation and climatic gradient factors constrain carbonate landscape evolution: New insights from in situ cosmogenic 36Cl Quat. Geochronol. (IF 3.079) Pub Date : 2020-03-28 Ye Yang, Yun-Chao Lang, Sheng Xu, Cong-Qiang Liu, Li-Feng Cui, Stewart P.H.T. Freeman, Klaus M. Wilcken
In situ cosmogenic nuclides are widely employed to quantify topographic and geomorphic landscape evolution. However, few studies are devoted to investigating possibly unsteady denudation. In this work the denudation rates of five surface bedrock and one depth profile are measured using in situ cosmogenic 36Cl in different climate zones in China; cosmogenic 36Cl is a powerful proxy for the surface denudation
-
Exposure-age and erosion rate determination using the in-situ nuclide pair 10Be–14C Quat. Geochronol. (IF 3.079) Pub Date : 2020-03-23 Paul Muzikar
Cosmogenic nuclides (CN) are widely used to determine both erosion rates E and exposure ages t of surfaces. However, in situations where both quantities are unknown, measuring a single CN at a surface is typically not sufficient to determine both t and E. We discuss the possibility of determining both t and E by measuring the CN pair, in-situ 10 Be and 14 C in quartz, at a surface. We use a previously
-
The effect of residual signal on dose measurements using MET-pIRIR signals from K-feldspar Quat. Geochronol. (IF 3.079) Pub Date : 2020-03-20 Xue Rui, Bo Li, Yujie Guo
Overestimation in dose recovery results was observed at high doses (>1000 Gy) when a single-aliquot regenerative-dose (SAR) procedure is applied to the multiple-elevated-temperature post-IR IRSL (MET-pIRIR) signals from potassium-rich feldspar (K-feldspar) grains from the Nihewan Basin. Such overestimation results from the non-bleachable (residual) signals that were not appropriately corrected for
-
Validation of the LnTn method for De determination in optical dating of K-feldspar and quartz Quat. Geochronol. (IF 3.079) Pub Date : 2020-03-16 Bo Li, Zenobia Jacobs, Richard G. Roberts
In optical dating, equivalent dose (De) values for a sample are commonly obtained from measurement of the luminescence signals of individual mineral grains or aliquots and projection of the natural signals onto the corresponding regenerative-dose response curves. A final De estimate is calculated by using a statistical model to combine the individual De values. This method can be problematic for samples
-
The suitability of a low temperature post-IR IRSL signal for dating alluvial and colluvial “cut and fill” sequences in the Great Karoo, South Africa Quat. Geochronol. (IF 3.079) Pub Date : 2020-03-14 C.J. Oldknow, A.S. Carr, J.M. Hooke, Z. Shen
Alluvial and colluvial “cut and fill” deposits preserved in valleys of the Karoo, South Africa, reflect basin-scale adjustments in fluvial process-regime. Such deposits in the Wilgerbosch catchment have previously proven difficult to date using radiocarbon (14C) and optically stimulated luminescence (OSL) methods. In this paper, we test the suitability of K-feldspar post-IR infrared (pIRIR) methods
-
Circumvention of anomalous fading in feldspar luminescence dating using Post-Isothermal IRSL Quat. Geochronol. (IF 3.079) Pub Date : 2020-02-29 Michel Lamothe, Laurence Forget Brisson, François Hardy
In luminescence dating of feldspar, laboratory induced luminescence necessary to assess the naturally acquired dose in the environment suffers from a poorly understood instability over time, known as anomalous fading (AF). AF is the source of commonly observed age underestimation in optical dating of feldspar. Approaches to circumvent AF include correction methods as well as attempts to measure directly
-
Testing the upper limit of luminescence dating based on standardised growth curves for MET-pIRIR signals of K-feldspar grains from northern China Quat. Geochronol. (IF 3.079) Pub Date : 2020-02-26 Xue Rui, Bo Li, Yujie Guo
The standardised growth curve (SGC) method has been applied to potassium-rich feldspar (K-feldspar) from samples at the Nihewan Basin, northern China. It was observed that the shapes of SGCs obtained from multiple-aliquot regenerative-dose (MAR) and single-aliquot regenerative-dose (SAR) procedures are different at high doses (>900 Gy) for the multiple-elevated-temperature post-IR IRSL (MET-pIRIR)
-
Glass shard K-Ar dating of the Chalupas caldera major eruption: Main Pleistocene stratigraphic marker of the Ecuadorian volcanic arc Quat. Geochronol. (IF 3.079) Pub Date : 2020-02-06 Mathilde Bablon, Xavier Quidelleur, Giuseppe Siani, Pablo Samaniego, Jean-Luc Le Pennec, Julius Nouet, Céline Liorzou, Santiago Santamaría, Silvana Hidalgo
New K-Ar ages obtained on juvenile pumice glass shards indicate that the Chalupas ignimbrite, one of the main Pleistocene tephra markers of the Ecuadorian arc, was emplaced at 216 ± 5 ka. Morphology and major and trace element contents of the glass shards are similar to those of ash layers from deep-sea cores and allow correlation between continental deposits and marine tephra layers. Based on biostratigraphy
-
The last glaciation in the headwater area of the Xiaokelanhe River, Chinese Altai: Evidence from 10Be exposure-ages Quat. Geochronol. (IF 3.079) Pub Date : 2020-02-05 Guocheng Dong, Weijian Zhou, Yunchong Fu, Li Zhang, Guoqing Zhao, Ming Li
The timing and extent of the last glaciation in the Altai Mountains are key to understanding climate change in this critical region. However, robust glacial chronologies are sparse across the Altai Mountains, especially in the Chinese Altai, impeding the correlation of glacial events and examination of the possible climate forcing mechanisms. Here, we report twenty new 10Be exposure-ages obtained from
-
Empirical assessment of beta dose heterogeneity in sediments: Implications for luminescence dating Quat. Geochronol. (IF 3.079) Pub Date : 2020-02-04 R.K. Smedley, G.A.T. Duller, D. Rufer, J.E.P. Utley
Optically stimulated luminescence (OSL) dating of single grains is often required to determine an accurate age for partially-bleached sediment by identifying those grains with OSL signals that were well bleached prior to burial. However, single-grain De distributions are typically characterised by greater amounts of scatter in comparison to multiple grains. Here we investigate the scatter in single-grain
-
The Saksunarvatn Ash and the G10ka series tephra. Review and current state of knowledge Quat. Geochronol. (IF 3.079) Pub Date : 2019-12-07 Bergrún Arna Óladóttir, Thor Thordarson, Áslaug Geirsdóttir, Guðrún Eva Jóhannsdóttir, Jan Mangerud
The Saksunarvatn Ash, first found in the Faroe Islands, is a tephra produced by the Grímsvötn volcanic system in Iceland. Since its discovery in the Faroe Islands, dark tephra with a similar stratigraphic position has been described at numerous locations around the North-Atlantic region; including 46 sites in Iceland (soil and lake sediments), 37 marine sediment cores from the North-Atlantic, 23 terrestrial
-
The deficiency of organic matter 14C dating in Chinese Loess-paleosol sample Quat. Geochronol. (IF 3.079) Pub Date : 2019-12-06 Peng Cheng, George S. Burr, Weijian Zhou, Ning Chen, Yaoyao Hou, Hua Du, Yunchong Fu, Xuefeng Lu
In the absence of reliable charcoal, wood or plant macrofossils, organic matter in loess-paleosols is often used for 14C dating. However, organic matter can be contaminated by a variety of carbon sources within the sediments, and this may affect the radiocarbon dating results. Specific chemical pretreatments can be applied to minimize such effects, and comparisons with optically stimulated luminescence
-
Comparison of single-aliquot and single-grain MET-pIRIR De results for potassium feldspar samples from the Nihewan Basin, northen China Quat. Geochronol. (IF 3.079) Pub Date : 2019-11-25 Yujie Guo, Bo Li, Hailong Zhao
In this study we compared De results obtained from single-aliquot (SA) and single-grain (SG) measurements on potassium rich feldspars (K-feldspars) from the Nihewan Basin, north China, based on the multiple-elevated-temperature post-infrared infrared (MET-pIRIR) stimulated luminescence. Discrepancy was observed between the SA and SG De results. Potential reasons for such discrepancy, including residual
Contents have been reproduced by permission of the publishers.