Radiocarbon最新文献_第8页

THE DATING OF DOLOMITIC MORTARS WITH UNCERTAIN CHRONOLOGY FROM MÜSTAIR MONASTERY: SAMPLE CHARACTERIZATION AND COMBINED INTERPRETATION OF RESULTS 对穆斯泰尔修道院年代不确定的白云质灰泥的年代测定：样品特征和结果的综合解释

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2023-12-12 DOI: 10.1017/rdc.2023.107

Marta Caroselli, Irka Hajdas, Patrick Cassitti

{"title":"THE DATING OF DOLOMITIC MORTARS WITH UNCERTAIN CHRONOLOGY FROM MÜSTAIR MONASTERY: SAMPLE CHARACTERIZATION AND COMBINED INTERPRETATION OF RESULTS","authors":"Marta Caroselli, Irka Hajdas, Patrick Cassitti","doi":"10.1017/rdc.2023.107","DOIUrl":"https://doi.org/10.1017/rdc.2023.107","url":null,"abstract":"To obtain scientific data regarding the chronology of archaeological structures, lime mortar radiocarbon dating has often demonstrated to be a decisive method. However, knowing the specific chemical-mineralogical characteristics of mortars can help when preparing samples or interpreting results. Among other issues, the dating of magnesian mortars can be particularly difficult because of the combined slaking, setting and hardening reactions of the calcium and magnesium phases, typical of these mortars. The formation of numerous mineralogical phases depending on reaction conditions adds further complexity to the dating method, which deserves to be studied with further detail. During the project “Mortar technology and construction history at Müstair Monastery” the first experiments in this regard had yielded encouraging results. An additional 4 samples from buildings with controversial chronology, thought to belong approximately to the 9th, 12th, and 15th centuries, were selected, prepared and radiocarbon dated. The data obtained were discussed by integrating preliminary petrographic characterization analyses of the mortars with archaeological information and excavation records. The results opened up new questions about the chronology of the Monastery, clarified the dating of some buildings and provided a better understanding of the potential and limitations of dating dolomitic mortars coming from archaeological context.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"1 4 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138574021","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

PREPARATION AND HANDLING OF METHANE FOR RADIOCARBON ANALYSIS AT COLOGNEAMS 在科隆进行放射性碳分析时甲烷的制备和处理

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2023-12-12 DOI: 10.1017/rdc.2023.109

Jan Olaf Melchert, Martina Gwozdz, Merle Gierga, Lukas Wacker, Dennis Mücher, Janet Rethemeyer

{"title":"PREPARATION AND HANDLING OF METHANE FOR RADIOCARBON ANALYSIS AT COLOGNEAMS","authors":"Jan Olaf Melchert, Martina Gwozdz, Merle Gierga, Lukas Wacker, Dennis Mücher, Janet Rethemeyer","doi":"10.1017/rdc.2023.109","DOIUrl":"https://doi.org/10.1017/rdc.2023.109","url":null,"abstract":"CH4 is the second most important anthropogenic greenhouse gas and originates from different sources. The use of radiocarbon (14C) analysis of CH4 opens up the possibility to differentiate geological and agricultural origin. At the CologneAMS facility, the demand for 14C analysis of CH4 required the development of a sample handling routine and a vacuum system that converts CH4 to CO2 for direct injection of CO2 into the AMS. We evaluated the processing of CH4 using several series of gas mixtures of 14C-free and modern standards as well as biogas with sample sizes ranging from 10 to 50 µg C. The results revealed a CH4 to CO2 conversion efficiency of 94–97% and blank values comparable to blank values achieved with our routinely used vacuum system for processing CO2 samples. The tests with a near modern CH4:CO2 biogas mixture gave reproducible results with a near modern 14C content of 0.967–1.000 F14C, after applying the background correction.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"1 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138574543","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

ASSESSMENT OF RESIDUAL GEOGENIC CARBON IN MORTARS CONCERNING RADIOCARBON DATING 有关放射性碳年代测定的灰泥中残留地质碳的评估

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2023-12-12 DOI: 10.1017/rdc.2023.81

Jan Válek, Petr Kozlovcev, Anna Fialová, Kristýna Kotková, Dita Frankeová, Ivo Světlík, Kateřina Pachnerová Brabcová

{"title":"ASSESSMENT OF RESIDUAL GEOGENIC CARBON IN MORTARS CONCERNING RADIOCARBON DATING","authors":"Jan Válek, Petr Kozlovcev, Anna Fialová, Kristýna Kotková, Dita Frankeová, Ivo Světlík, Kateřina Pachnerová Brabcová","doi":"10.1017/rdc.2023.81","DOIUrl":"https://doi.org/10.1017/rdc.2023.81","url":null,"abstract":"Quicklime samples were collected from six vertical layers (L1–L6) of a feedstock calcined in a traditional single-batch wood-fired kiln and assessed. Three samples were well-burned and three under-burned. The quicklime was slaked in an excess of water and the presence of unburned particles was investigated after settling it into putty. The putty was assessed as bulk and also at three depth levels. Thermal analysis determined the CO2 residua in the quicklime samples. Cathodoluminescence detected individual unburned particles and image analysis was used for their quantification. Settling of the putties led to a considerable reduction of geogenic particles in the layers above the bottom. This was also confirmed by the stable isotope analysis. In the case of the putties made from well-burned quicklime, the δ13C values of samples L4 and L5 ranged from –25.5‰ to –20.5‰ VPDB, and the δ18O values ranged from –17.5‰ to –16.5‰ VPDB. The fractionation was likely affected by the division according to the particle size during the sedimentation. The results of the 14C analysis correlate with the quantified percentage of cathodoluminescent particles.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"53 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138573851","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

RADIOCARBON, BIG DATA AND INTERNATIONAL HERITAGE 放射性碳、大数据和国际遗产

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2023-12-12 DOI: 10.1017/rdc.2023.111

Seren Griffiths, Lisa Brown, Neil Carlin, Tim Evans, Bisserka Gaydarska, Emma Hannah, Peter McKeague

{"title":"RADIOCARBON, BIG DATA AND INTERNATIONAL HERITAGE","authors":"Seren Griffiths, Lisa Brown, Neil Carlin, Tim Evans, Bisserka Gaydarska, Emma Hannah, Peter McKeague","doi":"10.1017/rdc.2023.111","DOIUrl":"https://doi.org/10.1017/rdc.2023.111","url":null,"abstract":"Radiocarbon data are the most commonly used chronometric measurement technique in archaeology. The introduction of the radiocarbon method offered new potential for independent, internationalized research projects. Today millions of radiocarbon measurements exist globally. However, the many strengths of radiocarbon for research in archaeology have also created an internationally significant challenge in heritage practice. How can we attempt to curate huge volumes of radiocarbon “legacy” data in systematic ways that facilitate interdisciplinary, international research? How can we contend with a dataset that is rapidly scalable, and needs to be kept live—updated, validated, curated, and related to existing national archives and data systems—beyond the timescale of any individual project? In this paper we introduce an international project, “Project Radiocarbon; Big Data, integrated cross-national heritage histories”, working across the historic environment sector in Ireland and the United Kingdom, that is developing a solution to these issues. We argue that we need to think critically about how we classify and curate radiocarbon data, to render them interoperable and findable. Such work requires inter-sector approaches to ensure sustainability and scalability, and to anticipate the increasing value of these data into the future.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"1 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138574029","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

STABLE ISOTOPE AND RADIOCARBON DATING OF HUMAN SKELETAL REMAINS FROM ISLAMIC SETTLEMENT, KHIRBET AL-SHEIKH HUMAID, NABLUS, PALESTINE 巴勒斯坦纳布卢斯 KHIRBET AL-SHEIKH HUMAID 伊斯兰定居点人类骨骼遗骸的稳定同位素和放射性碳年代测定法

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2023-12-12 DOI: 10.1017/rdc.2023.115

Loay Abu Alsaud, Amer Al-Qobbaj

引用次数: 0

A UNIVERSAL GAS INTERFACE FOR SIMULTANEOUS 14C AND δ13C MEASUREMENTS 用于 14C 和 δ13C 复合测量的通用气体接口

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2023-12-12 DOI: 10.1017/rdc.2023.113

Melina Wertnik, Lukas Wacker, Stefano M. Bernasconi, Negar Haghipour, Timothy I Eglinton, Caroline Welte

{"title":"A UNIVERSAL GAS INTERFACE FOR SIMULTANEOUS 14C AND δ13C MEASUREMENTS","authors":"Melina Wertnik, Lukas Wacker, Stefano M. Bernasconi, Negar Haghipour, Timothy I Eglinton, Caroline Welte","doi":"10.1017/rdc.2023.113","DOIUrl":"https://doi.org/10.1017/rdc.2023.113","url":null,"abstract":"While simultaneous radiocarbon and δ13C measurements have been available for organic materials (by accelerator mass spectrometry, AMS, and isotope ratio mass spectrometry, IRMS, respectively), this has not been possible for carbonates until now. Using an existing interface for gas ion source AMS measurements, we developed a prototype for a universal gas interface that allows simultaneous measurement of both carbon isotope ratios from potentially any source of CO2. First results obtained from reference materials (IAEA-C6, OxaII, PhA, IAEA-C1, IAEA-C2, ETH-4) show that for both organic as well as carbonate samples, the precision of radiocarbon measurements in the coupled mode is comparable to routine standalone AMS measurements. For IRMS δ13C measurements, the performance for different materials shows more variation with precisions ranging from 0.07‰ to 0.47‰. However, both organic materials and carbonates can achieve precisions as good as 0.13‰. Once fully automated, the method shows potential for filling the gap of simultaneous carbon isotope measurements for non-organic materials.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"87 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138573085","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

THE ROLE OF 14C DATING IN THE IDENTIFICATION OF MISSING PERSONS IN CYPRUS 14C 年代测定在塞浦路斯失踪人员身份鉴定中的作用

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2023-12-11 DOI: 10.1017/rdc.2023.104

Gianluca Quarta, Theodora Eleftheriou, Istenc Engin, Lucio Maruccio, Marisa D’Elia, Lucio Calcagnile

{"title":"THE ROLE OF 14C DATING IN THE IDENTIFICATION OF MISSING PERSONS IN CYPRUS","authors":"Gianluca Quarta, Theodora Eleftheriou, Istenc Engin, Lucio Maruccio, Marisa D’Elia, Lucio Calcagnile","doi":"10.1017/rdc.2023.104","DOIUrl":"https://doi.org/10.1017/rdc.2023.104","url":null,"abstract":"The Committee on Missing Persons in Cyprus (CMP) is a bicommunal committee with the mandate to locate and identify the skeletal remains of 2002 persons who were reported missing during the inter-communal fighting of 1963–64, as well as the events of July and August 1974. During the periods of conflict, several archaeological sites and old cemeteries were used as primary burial sites, among several other types of burials, as they were easily accessed by the persons involved in the interment and little effort was needed to conceal the bodies. The relatively large post-mortem interval and the generally poor post-mortem preservation of the skeletal remains poses an additional challenge in the forensic examination process and the identification of the remains, particularly in the absence of a context or other associated artifacts/evidence. Between 2016 and 2020, the CMP has been collaborating with CEDAD to clarify the relevancy of several cases by using radiocarbon dating. The CMP submitted 139 cases to CEDAD out of which 112 were determined as not linked to the 1963–64 and 1974 events and then not relevant for the CMP project. For the remaining samples radiocarbon dating was used to determine death age.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"4 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138567232","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 RADIOCARBON CHRONOLOGY FOR “GROTTE DI PERTOSA” IN CAMPANIA, SOUTHERN ITALY 意大利南部坎帕尼亚 "佩尔托萨石窟 "的放射性碳年代学

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2023-12-11 DOI: 10.1017/rdc.2023.108

Felice Larocca, Francesco Breglia, Lucio Calcagnile, Marisa D’Elia, Gianluca Quarta

{"title":"A RADIOCARBON CHRONOLOGY FOR “GROTTE DI PERTOSA” IN CAMPANIA, SOUTHERN ITALY","authors":"Felice Larocca, Francesco Breglia, Lucio Calcagnile, Marisa D’Elia, Gianluca Quarta","doi":"10.1017/rdc.2023.108","DOIUrl":"https://doi.org/10.1017/rdc.2023.108","url":null,"abstract":"The Pertosa Caves, today also known as the Pertosa-Auletta Caves, constitute an important karst system in the Campania region (southern Italy). Crossed by the waters of a river that re-emerges on the surface, they have an overall development of about 3 km. Thanks to the width of the entrance, the excellent location along a natural communication route through the mountains and the natural availability of water directly on the site, the initial part of the cavity was frequented by humans, without interruption, from prehistoric times to the Middle Ages. During the protohistory, in particular, the moment of most marked human presence is recorded in the cave. In this phase an extensive pile dwelling system was built on the waters of the underground river. The system was probably created to make the location, subject to frequent flooding, suitable for human settlement. This structure today constitutes an archaeological unicum not only in Italy but throughout Europe. We briefly analyze its general characteristics providing the results of a radiocarbon dating campaign which allowed to assess the occupation phases of the different contexts and the life span of the wooden artifacts, which came to us in a very good state of preservation. Radiocarbon data allowed to assess the chronological range of the human frequentation of the caves and to date the exceptionally well preserved underground pile dwelling system.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"69 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138567557","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

HOLOCENE OVERWASH OCCURRENCE AGE IN THE ISUMI RIVER LOWLAND, EASTERN BOSO PENINSULA, JAPAN 日本东波索半岛等静河低地全新世冲过期

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2023-12-06 DOI: 10.1017/rdc.2023.105

Soichiro Oda, Stephen P Obrochta, Osamu Fujiwara, Yusuke Yokoyama, Yosuke Miyairi, Yoshiya Hatakeyama

{"title":"HOLOCENE OVERWASH OCCURRENCE AGE IN THE ISUMI RIVER LOWLAND, EASTERN BOSO PENINSULA, JAPAN","authors":"Soichiro Oda, Stephen P Obrochta, Osamu Fujiwara, Yusuke Yokoyama, Yosuke Miyairi, Yoshiya Hatakeyama","doi":"10.1017/rdc.2023.105","DOIUrl":"https://doi.org/10.1017/rdc.2023.105","url":null,"abstract":"Analysis of the chronological data and observation of a lagoonal sediment core reveal sand washover events between around 2.4 to 2.5 cal. ky BP in the Isumi River lowland. We conducted radiocarbon dating with AMS and constructed an age-depth model using the latest calibration curve and appropriate model routine. In the middle to lower part of the core, dark-gray sand layers are repeatedly deposited. Sand layers may exhibit an erosional surface at the base with fining upward grading. The overwash layers are composed of well-rounded sand with occasional gravel, indicative of transportation. overwash sediment characteristics are consistent with proximal marine deposits, suggesting an ocean origin (though riverine sediment is also similar in character). The age-depth model indicates very high sediment accumulation rates associated with overwash deposits. Based on the amount of accumulated sediment, relatively large-scale redeposition events occurred during this period but more information is needed to constrain the mechanism(s) causing the events. We also present a local reservoir age correction compatible with the Marine20 calibration curve.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"19 3","pages":""},"PeriodicalIF":8.3,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524443","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

RADIOCARBON DATING AND FRESHWATER RESERVOIR EFFECTS OF AQUATIC MOLLUSKS WITHIN FLUVIAL CHANNEL DEPOSITS IN THE MIDWESTERN UNITED STATES 美国中西部河道沉积物中水生软体动物的放射性碳定年和淡水储层效应

IF 8.3 3区地球科学

Radiocarbon Pub Date : 2023-11-28 DOI: 10.1017/rdc.2023.93

Jason A Rech, Christina N Tenison, Alexander Baldasare, Brian S Currie

{"title":"RADIOCARBON DATING AND FRESHWATER RESERVOIR EFFECTS OF AQUATIC MOLLUSKS WITHIN FLUVIAL CHANNEL DEPOSITS IN THE MIDWESTERN UNITED STATES","authors":"Jason A Rech, Christina N Tenison, Alexander Baldasare, Brian S Currie","doi":"10.1017/rdc.2023.93","DOIUrl":"https://doi.org/10.1017/rdc.2023.93","url":null,"abstract":"Late Quaternary fluvial channel deposits are notoriously difficult to date. In the midwestern United States, shells of aquatic mollusks can be found within many fluvial channel sediments and therefore can be radiocarbon (14C) dated to determine the age of the deposits. However, carbonate platform rocks are abundant in this region, potentially causing freshwater 14C reservoir effects (FRE) in mollusk shells. We 14C dated 11 aquatic gastropod and bivalve shell samples from specimens collected live from a stream in southwestern Ohio during three different years to assess the modern 14C reservoir effect. Modern samples yielded an average 14C FREmodern of 518 ± 65 14C yrs for 2020 (n=5), 640 ± 34 14C yrs for 2021 (n=2), and 707 ± 76 14C yrs for 2022 (n=4). We also 14C dated matched pairs of organic wood or charcoal and aquatic mollusk shells from late Pleistocene and Holocene deposits in the Four Mile Creek floodplain to determine the FREfossil. These samples, free of any potential influence from nuclear bomb testing, yielded an overall weighted mean FREfossil of 1029 ± 345 14C yrs. We then assess the advantages and limitations of both the FREmodern and FREfossil methods for determining freshwater reservoir effects. Finally, we apply the FREfossil correction to a series of shell ages from fluvial terrace deposits as a case study. The results indicate that although there is a 14C FRE in streams from the midwestern United States, aquatic shells can provide robust age control on fluvial channel deposits. More research is needed to understand the spatial and temporal variability of FREs, as well as any species effects, among various watersheds across the midwestern United States.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"42 2","pages":""},"PeriodicalIF":8.3,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524454","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