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CHARACTERIZATION AND SELECTION OF MORTAR SAMPLES FOR RADIOCARBON DATING IN THE FRAMEWORK OF THE MODIS2 INTERCOMPARISON: TWO COMPARED PROCEDURES 在 modis2 互比框架内确定和选择用于放射性碳年代测定的灰泥样本：两种比较程序

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2024-02-13 DOI: 10.1017/rdc.2024.3

G Artioli, S Barone, M Fedi, A Galli, L Liccioli, M Martini, F Marzaioli, F Maspero, L Panzeri, I Passariello, G Ricci, M Secco, F Terrasi

{"title":"CHARACTERIZATION AND SELECTION OF MORTAR SAMPLES FOR RADIOCARBON DATING IN THE FRAMEWORK OF THE MODIS2 INTERCOMPARISON: TWO COMPARED PROCEDURES","authors":"G Artioli, S Barone, M Fedi, A Galli, L Liccioli, M Martini, F Marzaioli, F Maspero, L Panzeri, I Passariello, G Ricci, M Secco, F Terrasi","doi":"10.1017/rdc.2024.3","DOIUrl":"https://doi.org/10.1017/rdc.2024.3","url":null,"abstract":"For several decades, many efforts have been dedicated to enhancing the accuracy of mortar radiocarbon dating and evaluating the reliability of the results concerning the typology of the examined specimens. Several assumptions that are fundamental for the application of the method may be in many cases not fulfilled, such as (a) complete primary limestone dissociation during calcination, (b) efficient separation of geogenic carbon contained in calcareous aggregates, (c) short carbonation time, and (d) absence of secondary calcite. Many laboratories all over the world have proposed different methods to select suitable fractions of mortar. The first intercomparison attempt, involving eight international laboratories, was organized in 2016 aiming at comparing and statistically treating the results obtained on the same materials by different laboratories with their own characterization and pre-treatment methods (Hajdas et al. 2017; Hayen et al. 2017). Following this first step, a new intercomparison experiment was proposed and set up in 2018 during the Mortar Dating International Meeting (Bordeaux, FR). A new set of three mortar samples was chosen, taking care of the selection of standardized materials (homogeneity, known mineralogical composition, absence of exogenous inclusions, known expected age). This work describes the results of two research teams involved in the intercomparison. The samples were characterized, selected, and dated depending on each laboratory strategy. The results stress the importance of the characterization of the raw material is to better understand the mineralogical and petrographical composition of the samples. Such information can support the choice of the most appropriate strategy for the extraction of CO2 and then for data interpretation.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"12 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139754459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A SUMMARY OF RADIOCARBON MEASUREMENTS OF FLUVIAL AND COLLUVIAL DEPOSITS IN CATCHMENTS OF SOUTH-CENTRAL ONTARIO, CANADA 加拿大安大略省中南部集水区河流和冲积沉积物放射性碳测量概要

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2024-02-13 DOI: 10.1017/rdc.2024.2

William C Mahaney, Andrew M Stewart

{"title":"A SUMMARY OF RADIOCARBON MEASUREMENTS OF FLUVIAL AND COLLUVIAL DEPOSITS IN CATCHMENTS OF SOUTH-CENTRAL ONTARIO, CANADA","authors":"William C Mahaney, Andrew M Stewart","doi":"10.1017/rdc.2024.2","DOIUrl":"https://doi.org/10.1017/rdc.2024.2","url":null,"abstract":"Fluvial and colluvial deposits of Late Holocene age in South-Central Ontario catchments have provided few 14C dates, most by conventional methods registering century-old ages. Other young deposits, dated by conventional and accelerator mass spectrometry radiocarbon (AMS 14C), have yielded bomb-affected post-1950 ages over variable time limits. Attempts to date the base of Ah and lower-in-section soil horizons, in Early to Late Holocene stream terrace deposits, have yielded atomic bomb effects. Comparing bomb contamination in Late Holocene fluvial deposits, using both conventional and AMS methods, identifies a mix of bomb-affected beds juxtaposed with dated beds, the latter yielding ages with narrow standard deviations. Colluvial deposits overlying key glacial sections in the Rouge Catchment, while rare, yield bracketed AMS ages for an Ahbk horizon that refines weathering times relative to previously obtained conventional 14C dates. Bomb-affected sediment appears variably distributed within floodplain soils and in the ground soil of a colluvial section. Mass wasted deposits, with AMS 14C ages spread over the last few centuries, appear related to Little Ice Age (LIA) changes in climate, corroborated by pollen records. Further, these AMS-14C dated beds calibrate weathering of secondary Fe-Al oxihydroxides over the first half a millennium of weathering time.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"1 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139754494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

14C PREPARATION PROTOCOLS FOR ARCHAEOLOGICAL SAMPLES AT THE LMC14, SACLAY, FRANCE 14C 法国萨克雷 LMC14 考古样本制备规程

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2024-01-24 DOI: 10.1017/rdc.2023.119

J-P Dumoulin, C Moreau, E Delqué-Količ, I Caffy, D Farcage, C Goulas, S Hain, M Perron, A Semerok, M Sieudat, B Thellier, L Beck

引用次数: 0

“APPROXIMATE” WIGGLE-MATCH DATING APPLIED TO EARLY AMERICAN MUSEUM OBJECTS 应用于美国早期博物馆藏品的 "近似 "触发匹配年代测定法

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2024-01-23 DOI: 10.1017/rdc.2023.127

Carla S Hadden, Katharine G Napora, Brent W Tharp

引用次数: 0

14C IN TREE RINGS IN THE VICINITY OF THE RBMK REACTOR NUCLEAR POWER PLANT RBMK 反应堆核电站附近树木年轮中的 14c

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2024-01-23 DOI: 10.1017/rdc.2023.125

Evgeniy I Nazarov, Alexander V Kruzhalov, Maxim E Vasyanovich, Alexey A Ekidin, Maria D Pyshkina, Vladimir V Kukarskikh, Ekaterina V Parkhomchuk

{"title":"14C IN TREE RINGS IN THE VICINITY OF THE RBMK REACTOR NUCLEAR POWER PLANT","authors":"Evgeniy I Nazarov, Alexander V Kruzhalov, Maxim E Vasyanovich, Alexey A Ekidin, Maria D Pyshkina, Vladimir V Kukarskikh, Ekaterina V Parkhomchuk","doi":"10.1017/rdc.2023.125","DOIUrl":"https://doi.org/10.1017/rdc.2023.125","url":null,"abstract":"The paper presents the results of radiocarbon (14C) concentration measurements in tree rings in the vicinity of Kursk NPP (Russia) with four operating RBMK reactors. The sampling was carried out from the site with the highest expected accumulation of radiocarbon in vegetation. The site was determined with long-term meteorological data. The measurements of 14C concentration carried out with accelerator-mass spectrometer in Budker Institute of Nuclear Physics, Novosibirsk, Russia. The obtained results demonstrated the influence of exploitation of Kursk NPP to the concentration of 14C in tree rings. Based on the equilibrium between the 14C ratio in the tree rings and the surrounding air, retrospective estimates of the radiocarbon discharge and effective doses were made. Effective doses were calculated with two approaches: IAEA methodology and less conservative approach, considering the real food consumption in the Kursk region. The values of calculated doses by the second method (0.08–2.58 μSv) are more than 2 times less than IAEA approach (0.17–5.30 μSv). The highest difference between measured and background 14C in tree ring is 41.7 ± 5.8 pMC in 2014 during the restoration of graphite stack. The main contribution to 14С exposure in the considering period is caused by background – from 70 to 99%.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"96 ","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139556025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CHRONOLOGICAL MODELING ON A CALIBRATION PLATEAU: IMPLICATIONS FOR THE EMERGENCE OF AGRICULTURE IN THE DUTCH WETLANDS 校准高原上的年代模型：对荷兰湿地农业出现的影响

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2024-01-22 DOI: 10.1017/rdc.2023.126

Merita Dreshaj, Daan Raemaekers, Michael Dee

引用次数: 0

OPTICALLY STIMULATED LUMINESCENCE (OSL) MORTAR DATING INTER-COMPARISON STUDY. THE SECOND ROUND OF MODIS, MORTAR DATING INTER-COMPARISON STUDY 光激发发光（OSL）灰泥年代相互比较研究。第二轮莫迪斯、灰泥定年相互比较研究

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2024-01-18 DOI: 10.1017/rdc.2023.124

Petra Urbanová, Laura Panzeri, Jorge Sanjurjo-Sánchez, Marco Martini, Francesco Maspero, Pierre Guibert, Anna Galli

引用次数: 0

A VIEW FROM THE COUNTRYSIDE: RADIOCARBON CHRONOLOGY FOR ZAOLINHETAN OF THE PRE-ZHOU CULTURE IN EARLY DYNASTIC CHINA 从乡村看世界中国早期先周文化枣林河滩的放射性碳年代学

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2024-01-18 DOI: 10.1017/rdc.2023.121

Xiaojian Li, Wei Liu, Yongxiang Xu, Haifeng Dou, A Mark Pollard, Ruiliang Liu

{"title":"A VIEW FROM THE COUNTRYSIDE: RADIOCARBON CHRONOLOGY FOR ZAOLINHETAN OF THE PRE-ZHOU CULTURE IN EARLY DYNASTIC CHINA","authors":"Xiaojian Li, Wei Liu, Yongxiang Xu, Haifeng Dou, A Mark Pollard, Ruiliang Liu","doi":"10.1017/rdc.2023.121","DOIUrl":"https://doi.org/10.1017/rdc.2023.121","url":null,"abstract":"The conquest of the Shang Dynasty at Anyang around 1046 BCE by the Zhou is one of the major events for not only Chinese Bronze Age but also early interaction between the pastoralist groups from the Eurasian Steppes and agriculture ones in the Central Plains of China. It is well-known from historical texts that the pre-Zhou people lived in the ancient Bin region (豳), the exact location of which is unclear, but most likely in the Jing River valley. At some point the leader Gugong Danfu (古公亶父) moved from Bin to the capital Qi (Zhouyuan), which preceded the Zhou invasion of Anyang. We have produced a new high resolution radiocarbon chronology for Zaolinhetan, a small settlement in the pre-Zhou heartland. This shows not only an exceptionally long chronological span for the site, but also a different phasing compared to the traditional pottery typology, which raises new questions regarding the regional variation of pottery typologies. Intriguingly, the analysis also reveals a rapid abandonment of Zaolinhetan around 1100 BCE, at the same time many larger sites, such as Zhouyuan, which later became the capital of the Western Zhou dynasty, were significantly expanding. We argue that the drastic decline of Zaolinhetan as revealed by the substantial number of radiocarbon dates and probably also the movement of pre-Zhou political center from Bin to Qin, was part of bigger picture that involved a range of social and environmental factors.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"27 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139501480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

AMS 14C DATING AND STABLE ISOTOPE ANALYSIS ON AN 8-KYR OYSTER SHELL FROM TAIPEI BASIN: SEA LEVEL AND SST CHANGES 对台北盆地 8 年生牡蛎贝壳的氨基比林 14c 测定和稳定同位素分析：海平面和地下水位的变化

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2024-01-17 DOI: 10.1017/rdc.2023.117

Hong-Chun Li, Horng-Sheng Mii, Tsung-Kwei Liu, Wen-Shan Chen, Su-Chen Kang, Chun-Yen Chou, Satabdi Misra, Tzu-Tsen Shen, Meixun Zhao

{"title":"AMS 14C DATING AND STABLE ISOTOPE ANALYSIS ON AN 8-KYR OYSTER SHELL FROM TAIPEI BASIN: SEA LEVEL AND SST CHANGES","authors":"Hong-Chun Li, Horng-Sheng Mii, Tsung-Kwei Liu, Wen-Shan Chen, Su-Chen Kang, Chun-Yen Chou, Satabdi Misra, Tzu-Tsen Shen, Meixun Zhao","doi":"10.1017/rdc.2023.117","DOIUrl":"https://doi.org/10.1017/rdc.2023.117","url":null,"abstract":"Seven accelerator mass spectrometry radiocarbon (AMS 14C) dates (7260±106∼7607±95 BP averaged 7444±103 BP) on a giant oyster shell, collected from an ancient shore of the Taipei Basin, are similar to the LSC (liquid scintillation counting) 14C age (7260±46 BP) of a grass sample inside the shell. The calibrated 14C ages of the C. gigas by Marine20 are 7490±240∼7805±230 cal BP (average 7660±96 cal BP), generally agreed with the calibrated LSC 14C ages of the grass and the oyster shell. Combined with other 14C ages of shoreline samples in the Taipei Basin, it is evident that sea level rose from 8600 to 7600 cal BP and reached a stand higher than modern sea level. During this marine transgression, the sedimentation rate along the shoreline was very high because 14C dating was not able to detect age differences for 4–5 m thick sediment sequences. Sixty-nine analyses of δ18O and δ13C from the oldest part of the shell exhibit clear seasonal cycles, with a 4-year period of growth in the 5.5-cm section. According to the δ18O values, the ancient oyster grew in a warmer-than-present shoreline environment, suggesting that the current absence of the giant oyster in Taiwan is not due to warming conditions.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"18 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139483677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

COMPREHENSIVE UPDATE OF MARINE RESERVOIR VALUES FOR NEW ZEALAND COASTAL WATERS TO INFORM COASTAL HAZARD RESEARCH 全面更新新西兰沿海水域海洋储量值，为沿海灾害研究提供信息

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2024-01-17 DOI: 10.1017/rdc.2023.120

Kate J Clark, Jocelyn C Turnbull, Bruce A Marshall, Taylor W A Ferrick, Jamie D Howarth

{"title":"COMPREHENSIVE UPDATE OF MARINE RESERVOIR VALUES FOR NEW ZEALAND COASTAL WATERS TO INFORM COASTAL HAZARD RESEARCH","authors":"Kate J Clark, Jocelyn C Turnbull, Bruce A Marshall, Taylor W A Ferrick, Jamie D Howarth","doi":"10.1017/rdc.2023.120","DOIUrl":"https://doi.org/10.1017/rdc.2023.120","url":null,"abstract":"Marine radiocarbon (14C) ages are an important geochronology tool for the understanding of past earthquakes and tsunamis that have impacted the coastline of New Zealand. To advance this field of research, we need an improved understanding of the radiocarbon marine reservoir correction for coastal waters of New Zealand. Here we report 170 new ΔR20 (1900–1950) measurements from around New Zealand made on pre-1950 marine shells and mollusks killed by the 1931 Napier earthquake. The influence of feeding method, living depth and environmental preference on ΔR is evaluated and we find no influence from these factors except for samples living at or around the high tide mark on rocky open coastlines, which tend to have anomalously low ΔR values. We examine how ΔR varies spatially around the New Zealand coastline and identify continuous stretches of coastline with statistically similar ΔR values. We recommend subdividing the New Zealand coast into four regions with different marine reservoir corrections: A: south and western South Island, ΔR20 –113 ± 33 yr, B: Cook Strait and western North Island, ΔR20 –171 ± 29 yr, C: northeastern North Island, ΔR20 –143 ± 18 yr, D: eastern North Island and eastern South Island, ΔR20 –70 ± 39 yr.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"17 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139483613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0