scholarly journals Radiocarbon dating legacy collections: A Bayesian analysis of high-precision AMS 14C dates from the Par-Tee site, Oregon

2018 ◽  
Vol 21 ◽  
pp. 833-848 ◽  
Author(s):  
Gabriel M. Sanchez ◽  
Torben C. Rick ◽  
Brendan J. Culleton ◽  
Douglas J. Kennett ◽  
Michael Buckley ◽  
...  
Keyword(s):  
Bayesian Analysis ◽  
High Precision ◽  
Radiocarbon Dating

Radiocarbon Dating the Iroquoian Occupation of Northern New York

2019 ◽  
Vol 84 (4) ◽  
pp. 748-761 ◽  
Author(s):  
Timothy J. Abel ◽  
Jessica L. Vavrasek ◽  
John P. Hart
Keyword(s):  
New York ◽  
Population Growth ◽  
Bayesian Analysis ◽  
High Precision ◽  
Radiocarbon Dating ◽  
Faunal Remains ◽  
Radiocarbon Dates

The results of Bayesian analysis using 43 new high-precision AMS radiocarbon dates on maize, faunal remains, and ceramic residues from 18 precontact Iroquoian village sites in Northern New York are presented. Once thought to span AD 1350–1500, the period of occupation suggested by the modeling is approximately AD 1450–1510. This late placement now makes clear that Iroquoians arrived in the region approximately 100 years later than previously thought. This result halves the time in which population growth and significant changes in settlement occurred. The new chronology allows us to better match these events within a broader Northeast temporal framework.

The Neolithic burial sequence at Flintbek LA 3, north Germany, and its cart tracks: a precise chronology

Antiquity ◽  
2011 ◽  
Vol 85 (329) ◽  
pp. 742-758 ◽  
Author(s):  
Doris Mischka
Keyword(s):  
Bayesian Analysis ◽  
High Precision ◽  
Radiocarbon Dating ◽  
Northern Europe ◽  
North Germany ◽  
The Baltic ◽  
First Time ◽  
Better Than ◽  
Global Evidence

Radiocarbon dating of 32 stratigraphic samples aided by Bayesian analysis has allowed the author to produce a high precision chronology for the construction and development of a continental Neolithic long barrow for the first time. She shows when and how quickly people living on the shore of the Baltic adopted pit graves, megalithic chambers and long barrows. Better than that, she provides a date for the famous cart tracks beneath the final barrow to 3420–3385 cal BC. Although other parts of the package — ploughing and pottery — are late arrivals, her analysis of the global evidence shows that Flintbek remains among the earliest sightings of the wheel in northern Europe.

scholarly journals BATCH PROCESSING OF TREE-RING SAMPLES FOR RADIOCARBON ANALYSIS

Radiocarbon ◽  
2020 ◽  
pp. 1-13
Author(s):  
Alexandra Fogtmann-Schulz ◽  
Sabrina G K Kudsk ◽  
Florian Adolphi ◽  
Christoffer Karoff ◽  
Mads F Knudsen ◽  
...  
Keyword(s):  
High Precision ◽  
Tree Rings ◽  
Precision Measurement ◽  
Radiocarbon Dating ◽  
The Other ◽  
High Precision Measurement ◽  
Machine Performance ◽  
High Throughput Method ◽  
Ca 50 ◽  
Low Activity

ABSTRACT We here present a comparison of methods for the pretreatment of a batch of tree rings for high-precision measurement of radiocarbon at the Aarhus AMS Centre (AARAMS), Aarhus University, Denmark. The aim was to develop an efficient and high-throughput method able to pretreat ca. 50 samples at a time. We tested two methods for extracting α-cellulose from wood to find the most optimal for our use. One method used acetic acid, the other used HCl acid for the delignification. The testing was conducted on background 14C samples, in order to assess the effect of the different pretreatment methods on low-activity samples. Furthermore, the extracted wood and cellulose fractions were analyzed using Fourier transform infrared (FTIR) spectroscopy, which showed a successful extraction of α-cellulose from the samples. Cellulose samples were pretreated at AARAMS, and the graphitization and radiocarbon analysis of these samples were done at both AARAMS and the radiocarbon dating laboratory at Lund University to compare the graphitization and AMS machine performance. No significant offset was found between the two sets of measurements. Based on these tests, the pretreatment of tree rings for high-precision radiocarbon analysis at AARAMS will henceforth use HCI for the delignification.

scholarly journals AMS Radiocarbon Dating of Tianma-Qucun Site in Shanxi, China

Radiocarbon ◽  
2001 ◽  
Vol 43 (2B) ◽  
pp. 1109-1114 ◽  
Author(s):  
Zhiyu Guo ◽  
Kexin Liu ◽  
Xiangyang Lu ◽  
Hongji Ma ◽  
Kun Li ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Bayesian Analysis ◽  
Accelerator Mass Spectrometry ◽  
Radiocarbon Dating ◽  
Lower Boundary ◽  
Historical Record ◽  
Shanxi Province ◽  
Ams Radiocarbon Dating ◽  
Western Zhou ◽  
Calibration Program

Tianma-Qucun is the biggest site of Western Zhou Dynasty discovered in Shanxi Province, China. It has been recognized as the early capital of Jin, a vassal state of Western Zhou. The territories were granted to the first Marquis of Jin with the title in the early days of Western Zhou. Bone sample series from the site were radiocarbon-dated by accelerator mass spectrometry (AMS) and calibrated with the Oxford calibration program OxCal 3.5. Bayesian analysis of the calibrated ages shows that the earliest residents of the Western Zhou came to Tianma-Qucun area in 1020–940 BC and the lower boundary of the Western Zhou is 796–754 BC, which corresponds well to the historical record 770 BC.

scholarly journals Data Analysis and Calibration of Radiocarbon Dating Results from the Cemetery of the Marquises of Jin

Radiocarbon ◽  
2001 ◽  
Vol 43 (1) ◽  
pp. 55-62 ◽  
Author(s):  
Xiangyang Lu ◽  
Zhiyu Guo ◽  
Hongji Ma ◽  
Sixun Yuan ◽  
Xiaohong Wu
Keyword(s):  
Data Analysis ◽  
High Precision ◽  
Radiocarbon Dating ◽  
Careful Analysis ◽  
Historical Record ◽  
Calibration Result ◽  
Special Part ◽  
Peking University ◽  
Very High ◽  
Good Agreement

The chronology study of the cemetery of Marquises of Jin is valuable to improving the chronological table of Marquis of Jin family. It is also helpful for improving the chronological table of the Zhou Dynasty. The samples were measured at Peking University (PKUAMS). We also made an interlaboratory check with Isotrace to ensure the accuracy. By careful analysis of archaeological information, we built different models and calibrated by OxCal. The calibration results, both sampling contexts and estimations, are in very good agreement with the historical record. Because the dates of some events correspond to the special part of the curve, the calibration gets very high precision. The calibration result of tomb M93 suggests that its host is Marquis Shangshu instead of Marquis Wen.

scholarly journals Bayesian Analysis for Uncertainty of Radiocarbon Dating

2015 ◽  
Vol 28 (3) ◽  
pp. 371-383
Author(s):  
Youngseon Lee ◽  
Jaeyong Lee ◽  
Jangsuk Kim
Keyword(s):  
Bayesian Analysis ◽  
Radiocarbon Dating

scholarly journals Bayesian Analysis of High-Precision AMS14C Dates from a Prehistoric Mexican Shellmound

Radiocarbon ◽  
2011 ◽  
Vol 53 (2) ◽  
pp. 245-259 ◽  
Author(s):  
Douglas J Kennett ◽  
Brendan J Culleton ◽  
Barbara Voorhies ◽  
John R Southon
Keyword(s):  
Mass Spectrometry ◽  
Bayesian Analysis ◽  
High Precision ◽  
Accelerator Mass Spectrometry ◽  
Archaic Period ◽  
Analytical Error ◽  
Statistical Framework ◽  
Radiocarbon Chronology

We establish a precision accelerator mass spectrometry (AMS) radiocarbon chronology for the Archaic period Tlacuachero shellmound (Chiapas, Mexico) within a Bayesian statistical framework. Carbonized twig samples were sequentially selected from well-defined stratigraphic contexts based on iterative improvements to a probabilistic chronological model. Analytical error for these measurements is ±15 to 2014C yr. This greater precision and the absence of stratigraphic reversals eclipses previous14C work at the site. Based on this, we establish a chronological framework for a sequence of 3 clay floors dating to between 4930 and 4270 cal BP and determine that the bedded shell deposits that formed the mound accumulated rapidly during 2 episodes: a lower 2-m section below the floors that accumulated over a 0–150 cal yr period at 5050–4875 cal BP and, an upper 3.5-m section above the floors that accumulated over a 0–80 cal yr period at 4380–4230 cal BP.

scholarly journals Construction of the Calendar Timescale for Lake Wigry (Ne Poland) Sediments on the Basis of Radiocarbon Dating

Radiocarbon ◽  
2007 ◽  
Vol 49 (2) ◽  
pp. 1133-1143 ◽  
Author(s):  
N Piotrowska ◽  
I Hajdas ◽  
G Bonani
Keyword(s):  
Bayesian Analysis ◽  
Critical Analysis ◽  
Radiocarbon Dating ◽  
Generalized Additive Models ◽  
Additive Models ◽  
Statistical Tools ◽  
Ne Poland ◽  
Age Model ◽  
Radiocarbon Chronology ◽  
The Last Glacial

A radiocarbon chronology of lake sediments deposited in Lake Wigry during the Last Glacial and Holocene periods provided the basis for calendar age-depth modeling. Various fractions (organics and carbonates) were dated and the results were subjected to critical analysis. The dates affected by reservoir effects as well as outlying data were excluded, and the non-linear age model was developed based on 13 ages. The statistical tools used for construction of the models include the Bayesian analysis, applied for calibration of 14C dates with regard to stratigraphical position of the samples, and generalized additive models (GAM).

scholarly journals A Counter System for High-Precision 14C Dating

Radiocarbon ◽  
1989 ◽  
Vol 31 (03) ◽  
pp. 399-406 ◽  
Author(s):  
Ede Hertelendi ◽  
Éva Csongor ◽  
Laszlo Zaborszky ◽  
Jozsef Molnar ◽  
Janos Gal ◽  
...  
Keyword(s):  
High Pressure ◽  
High Precision ◽  
Radiocarbon Dating ◽  
Data Evaluation ◽  
14C Dating ◽  
Counting Period ◽  
Low Level ◽  
Electrolytic Copper ◽  
Proportional Counters ◽  
Better Than

A multicounter radiocarbon dating system was developed applying the experiences of the previous one-channel low-level counting facility. The counter system consists of nine electrolytic copper proportional counters of identical diameters with sensitive volumes of 0.35–0.7dm3 and filled with either methane at high pressure (6 bar) or CO2 at 1 bar. The inner counters are surrounded by an anticoincidence shield consisting of five multiwire proportional flat counters filled with propane. The pulses of the detectors are handled by integrated amplifiers, discriminators and anticoincidence units interfaced to a microprocessor-controlled data evaluation unit. Software is written in BASIC using ASSEMBLER sub-routines. The overall precision of the system for modern carbon samples using high-pressure methane-filled counters (B ≍ 0.7 cpm, S ≍ 14 cpm) is better than 4 after a counting period of seven days.

High-Precision Radiocarbon Dating

1986 ◽  
Vol 66 (2) ◽  
pp. 358-360 ◽  
Author(s):  
E. M. Jope
Keyword(s):  
High Precision ◽  
Radiocarbon Dating
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