New Chronometric Dates for the Puquios of Nasca, Peru

1995 ◽  
Vol 6 (1) ◽  
pp. 56-69 ◽  
Author(s):  
Persis B. Clarkson ◽  
Ronald I. Dorn
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Organic Material ◽  
Settlement Pattern ◽  
Colonial Period ◽  
South Coast ◽  
Spanish Conquest ◽  
Rock Varnish ◽  
Available Information

Numeric age assessments of organic material encapsulated by rock varnish present on stone lintels of two “puquios” in the Nasca region of the south coast of Peru indicate a Precolumbian age. Accelerator mass spectrometry radiocarbon analyses at the Isotrace Laboratory revealed ages of cal A. D. 560(620)650 and cal A. D. 600(640)660 (1 sigma). These calibrated measurements are considered to be appropriate in the context of the archaeological settlement pattern data for the region. As well, the written documents of the colonial period neither confirm nor deny the presence of the puquios. Three assumptions are inherent in the acceptance of these dates: (1) AMS 14C dating and its application to rock varnish yield reliable results, (2) sample contamination can be recognized, and (3) determination of the age of the puquios rests upon testable available information; ex silentio arguments about the presence or absence of the puquios in the Nasca region before the Spanish conquest are inadequate for the resolution of the question.

Determination of the stellar (n,γ) cross section ofCa40with accelerator mass spectrometry

2009 ◽  
Vol 79 (6) ◽  
Author(s):  
I. Dillmann ◽  
C. Domingo-Pardo ◽  
M. Heil ◽  
F. Käppeler ◽  
A. Wallner ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Cross Section ◽  
Accelerator Mass Spectrometry

scholarly journals 14C Ages of Bone Fractions from Armenian Prehistoric Sites

Radiocarbon ◽  
2010 ◽  
Vol 52 (2) ◽  
pp. 569-577 ◽  
Author(s):  
Alexander Cherkinsky ◽  
Christine Chataigner
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Organic Material ◽  
Separation Technique ◽  
Middle Paleolithic ◽  
Radiocarbon Dates ◽  
Bone Material ◽  
Younger Age ◽  
Archaeological Artifacts ◽  
Good Agreement

Prehistoric cultures in Armenia are still poorly known; thus, accelerator mass spectrometry (AMS) radiocarbon dates are invaluable in constructing an accurate chronology. Bone samples have been collected from sites representing the Middle Paleolithic, Chalcolithic, and Early Bronze periods. Most of the bone samples are poorly preserved. We describe the separation technique for the extraction of both the bioapatite and collagen fractions. In many cases where the bone had very low organic material content, the collagen fractions yielded a younger age, although the ages of bioapatite fractions were found to be in good agreement with associated archaeological artifacts. In cases where bone was well preserved, both fractions exhibited ages in good agreement with the artifacts. The accuracy of 14C dating of bone material always depends on its degree of preservation, and each case should be carefully evaluated to determine which fraction is less contaminated in order to accurately date a burial event.

Sequential Injection Approach for Simultaneous Determination of Ultratrace Plutonium and Neptunium in Urine with Accelerator Mass Spectrometry

2013 ◽  
Vol 85 (18) ◽  
pp. 8826-8833 ◽  
Author(s):  
Jixin Qiao ◽  
Xiaolin Hou ◽  
Per Roos ◽  
Johannes Lachner ◽  
Marcus Christl ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Simultaneous Determination ◽  
Accelerator Mass Spectrometry ◽  
Sequential Injection

scholarly journals Determination of the Radiocarbon Age of Parchment of the Vinland Map

Radiocarbon ◽  
2002 ◽  
Vol 44 (1) ◽  
pp. 45-52 ◽  
Author(s):  
D J Donahue ◽  
J S Olin ◽  
G Harbottle
Keyword(s):  
Mass Spectrometry ◽  
Atlantic Ocean ◽  
Confidence Level ◽  
Accelerator Mass Spectrometry ◽  
Yale University ◽  
Rare Book ◽  
Radiocarbon Age ◽  
The One ◽  
Age Range

The Vinland Map, drawn on a 27.8 × 41.0 cm parchment bifolium, is housed in the Beinecke Rare Book and Manuscript Library at Yale University. In the northwest Atlantic Ocean, it shows “the Island of Vinland, discovered by Bjarni and Leif in company.” Skelton, Marston, and Painter (Skelton et al. 1965, 1995) firmly argued the map's authenticity, associating it with the Council of Basle (AD 1431–1449), that is, half a century before Columbus's voyage. Nevertheless, vigorous scholarly questioning of the map's authenticity has persisted (Washburn 1966; McCrone 1974; Olin and Towe 1976; Cahill et al. 1987; McCrone 1988; Towe 1990). We have determined the precise radiocarbon age of the map's parchment by accelerator mass spectrometry (AMS). The one-sigma calibrated calendrical date range is AD 1434 ± 11 years: the 95% confidence level age range is AD 1411–1468.

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