premiers resultats d'analyses au 05/07/2017 datations c14 adn

41 Pages·2017·2.87 MB·English

PREMIERS RESULTATS D'ANALYSES AU 05/07/2017
DATATIONS
C14 ADN
SYNTHÈSE DES ANALYSES C14
Âge en année / Estimation moyenne
USA - Floride Mexique
Beta Analytics INC Universidad Nacional
Autónoma de México
Maria 1 740 - pages 5-6 1 770 - page 15
Maria 2de mesure 1 750 - page 9
Main 7 000 - page 11 1 200 - page 15
Cerveau 1 050 - page 15
Victoria 800 - page 15
ANALYSE ADN
PALEO-DNA LAKEHEAD UNIVERSITY
CANADA
Matière extraite d’une tête & Main
100% Homo Sapiens
Sexe male
page 27
DATATION C14 "MARIA"
Laboratoire Floride - Beta Analytic
INC
June 23, 2017
Mrs. Kiersten Medvedich
Gaia
833 S Boulder Road
Louisville, CO 80027
United States
RE: Radiocarbon Dating Results
Dear Mrs. Medvedich,
Enclosed is the radiocarbon dating result for one sample recently sent to us. As usual, specifics of the analysis are listed on
the report with the result and calibration data is provided where applicable. The Conventional Radiocarbon Age has been
corrected for total fractionation effects and where applicable, calibration was performed using 2013 calibration databases (cited
on the graph pages).
The web directory containing the table of results and PDF download also contains pictures, a cvs spreadsheet download
option and a quality assurance report containing expected vs. measured values for 3-5 working standards analyzed
simultaneously with your samples.
The reported result is accredited to ISO/IEC 17025:2005 Testing Accreditation PJLA #59423 standards and all pretreatments
and chemistry were performed here in our laboratories and counted in our own accelerators here in Miami. Since Beta is not a
teaching laboratory, only graduates trained to strict protocols of the ISO/IEC 17025:2005 Testing Accreditation PJLA #59423
program participated in the analysis.
As always Conventional Radiocarbon Ages and sigmas are rounded to the nearest 10 years per the conventions of the 1977
International Radiocarbon Conference. When counting statistics produce sigmas lower than +/- 30 years, a conservative +/- 30
BP is cited for the result. The reported d13C was measured separately in an IRMS (isotope ratio mass spectrometer). It is NOT
the AMS d13C which would include fractionation effects from natural, chemistry and AMS induced sources.
When interpreting the result, please consider any communications you may have had with us regarding the sample. As
always, your inquiries are most welcome. If you have any questions or would like further details of the analysis, please do not
hesitate to contact us.
The cost of the analysis was charged to the American Express card provided. Thank you. As always, if you have any
questions or would like to discuss the results, don’t hesitate to contact us.
Sincerely ,
Page 1 of 3
REPORT OF RADIOCARBON DATING ANALYSES
Mrs. Kiersten Medvedich Report Date:June 23, 2017
Gaia Material Received:June 20, 2017
Conventional Radiocarbon Age (BP) or
Percent Modern Carbon (pMC) & Stable Isotopes
Sample Information and Data Sample Code Number
Calendar Calibrated Results: 95.4 % Probability
High Probability Density Range Method (HPD)
Beta - 467660 BTM2 1740 +/- 30 BP IRMS δ13C: -18.0 o/oo
Submitter Material: Tissue (60.2%) 320 - 411 cal AD (1630 - 1539 cal BP)
(35.2%) 249 - 308 cal AD (1701 - 1642 cal BP)
Analyzed Material: Tissue
Pretreatment: (tissue) acid/alkali/acid
Analysis Service: AMS-TIMEGUIDE delivery
Percent Modern Carbon: 80.52 +/- 0.30 pMC
Fraction Modern Carbon: 0.8052 +/- 0.0030
D14C: -194.75 +/- 3.01 o/oo
∆14C: -201.25 +/- 3.01 o/oo(1950:2017)
Measured Radiocarbon Age: (without d13C correction): 1630 +/- 30 BP
Calibration: BetaCal3.21: HPD method: SHCAL13
Results are ISO/IEC-17025:2005 accredited. No sub-contracting or student labor was used in the analyses. All work was done at Beta in 4
in-house NEC accelerator mass spectrometers and 4 Thermo IRMSs. The "Conventional Radiocarbon Age" was calculated using the
Libby half-life (5568 years), is corrected for total isotopic fraction and was used for calendar calibration where applicable. The Age is
rounded to the nearest 10 years and is reported as radiocarbon years before present (BP), “present" = AD 1950. Results greater than the
modern reference are reported as percent modern carbon (pMC). The modern reference standard was 95% the 14C signature of NIST
SRM-4990C (oxalic acid). Quoted errors are 1 sigma counting statistics. Calculated sigmas less than 30 BP on the Conventional
Radiocarbon Age are conservatively rounded up to 30. d13C values are on the material itself (not the AMS d13C). d13C and d15N values
are relative to VPDB-1. References for calendar calibrations are cited at the bottom of calibration graph pages.
Page 2 of 3
BetaCal 3.21
Calibration of Radiocarbon Age to Calendar Years
(High Probability Density Range Method (HPD): SHCAL13)
(Variables: d13C = -18.0 o/oo)
Laboratory number Beta-467660
Conventional radiocarbon age 1740 ± 30 BP
95.4% probability
(60.2%) 320 - 411 cal AD (1630 - 1539 cal BP)
(35.2%) 249 - 308 cal AD (1701 - 1642 cal BP)
68.2% probability
(42.7%) 336 - 386 cal AD (1614 - 1564 cal BP)
(25.5%) 254 - 290 cal AD (1696 - 1660 cal BP)
BTM2
1740 ± 30 BP Tissue
2000
1900
P)
B
n ( 1800
o
ati
n
mi 1700
er
et
d
n 1600
o
b
ar
c
o
di 1500
a
R
1400
1300
150 200 250 300 350 400 450 500
Calibrated date (cal AD)
Database used
SHCAL13
References
References to Probability Method
Bronk Ramsey, C. (2009). Bayesian analysis of radiocarbon dates. Radiocarbon, 51(1), 337-360.
References to Database SHCAL13
Hogg, et.al.,2013, Radiocarbon 55(4).
Beta Analytic Radiocarbon Dating Laboratory
4985 S.W. 74th Court, Miami, Florida 33155 • Tel: [phone] • Fax: [phone] • Email: [email protected]
Page 3 of 3
Quality Assurance Report
This report provides the results of reference materials used to validate radiocarbon analyses prior to reporting. Known-value
reference materials were analyzed quasi-simultaneously with the unknowns. Results are reported as expected values vs
measured values. Reported values are calculated relative to NIST SRM-4990B and corrected for isotopic fractionation. Results
are reported using the direct analytical measure percent modern carbon (pMC) with one relative standard deviation. Agreement
between expected and measured values is taken as being within 2 sigma agreement (error x 2) to account for total laboratory
error.
Report Date: June 23, 2017
Submitter: Mrs. Kiersten Medvedich
QA MEASUREMENTS
Reference 1
Expected Value: 129.41 +/- 0.06 pMC
Measured Value: 129.44 +/- 0.37 pMC
Agreement: Accepted
Reference 2
Expected Value: 0.44 +/- 0.10 pMC
Measured Value: 0.44 +/- 0.03 pMC
Agreement: Accepted
Reference 3
Expected Value: 41.14 +/- 0.10 pMC
Measured Value: 41.40 +/- 0.16 pMC
Agreement: Accepted
COMMENT: All measurements passed acceptance tests.
Validation: Date: June 23, 2017
SECONDE ANALYSE C14 MARIA
Laboratoire Floride
Beta Analytic INC
CALIBRATOIFRO AND IOCARABGOENT OC ALENDYAERA RS
MARIA
(VariaCb1l3e/sC=:1- 21 9o./3o o: lab. mult = 1)
Laborantuomrbye r Beta-46:4 7B4T1M
Conventriaodniaolc aargbeo n1 75±03 0B P
CalibrRaetseu(dl9 t5P %r obabiliCtayAl)D 2 45t o4 10 (C1a7l0 t5Bo1 P 5 40)
lnterocfre apdti ocaagrwebi otcnha libratCiaoAlnD 3 60( Cal BP 1590)
curve
CalibRreaustle(td6 8P%r obabilCiatAlyD )2 50 2t9o(5 C al BP 1700 to 1655)
CaAlD 3 35t o3 7(5C al1 6B1Pt5 o 1575)
175±03 0B P Tissue
1875
1850
1825
1800
1775
C1l
1750
1725
ü ---- -
,Q
C1l 1700
0::
---- -
1675
1650
1625
2 5 2 0 2 5 3 0 3 5 3 0 3 5 4 0 4 5
CaAlD
Databuasseed
SHCAL13
References
Mathematics used for calibration scenario
A SimplAipfpireodta oCc ahl ibrCa1t4Di antge s, AT.aS l,Vmo ag,eJ l.C, , 1 99R3a,d ioca3r5b(3o21n)7 -322
ReferetnocS eHsC A1L3 database
HogAgG ,H uaQ ,B lackPwGe,Nl ilMu , B ucCkE ,G uildeTrPsH,oe na tTo nJ , PalRmeeirm PeJJrRG, e, i mReWr,T urnGeSyM Z,i mmerSmRaHn.
201S3H.C alS1o3u thHeermni spchaelrieb r0a-t5i0o,ny0,e0 a0cr asBl P R.a dioca5r5b(1o48n)8 9-1903.
BetAan alyRtaidci ocaDrabtoiLnna gb oratory
498S5. W7.4 tCho urMti,a mFil,o r3i3d1a5• T5 e l(:3 05)667-51(6370 5)•6 6F3•aE- xm0:a9 ib6le4:t [email protected]
DATATION C14 DE LA MAIN
Laboratoire Floride
Beta Analytic INC