Intercalibration of 40Ar–39Ar age standards NL-25, HB3gr hornblende, GA1550, SB-3, HD-B1 biotite and BMus/2 muscovite
Intercalibration of 40Ar–39Ar age standards NL-25, HB3gr hornblende, GA1550, SB-3, HD-B1 biotite and BMus/2 muscovite
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40Arâ39Ar 年龄标准 NL-25、HB3gr 角闪石、GA1550、SB-3、HD-B1 黑云母和 BMus/2 白云母的相互校准
DOI:
10.1016/j.chemgeo.2007.03.016
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发表时间:
2007
期刊:
影响因子:
3.9
通讯作者:
Trieloff M.
中科院分区:
文献类型:
--
作者:
Schwarz W.H;Trieloff M.
40Ar–39Ar dating requires precise and accurate age data of standard fluence monitors. Besides primary calibration of K and40Ar concentrations (i.e. the ages are calculated with precise K–Ar dating), intercalibration of the different monitors in use provides important cross-checks of the validity of standard ages and, implicitly, reliability and uncertainty of chronological studies that rely on these standards. Here we report intercalibration of 5 primary international40Ar–39Ar standards and one internal laboratory monitor. A major goal of this study was to check the ages of the NL-25 hornblende standard and of the muscovite laboratory standard BMus/2 against the international standards HD-B1, GA1550, SB-3 and HB3gr. In replicate measurements of three irradiation series,40Ar–39Ar ages for the fluence monitors were found which agree within 1σ-error limits with the reported age values of 2660±9 Ma for NL-25, Hb3gr: 1073.6±4.6 Ma, BMus/2: 328.5±1.1 Ma, SB-3: 162.9±0.8, GA1550: 98.79±0.54 and 24.21±0.32 for HD-B1. For the hornblende NL-25 fluence monitor a new – slightly different –40Ar–39Ar age of 2657±4 Ma is suggested. For the age of the muscovite BMus/2 laboratory standard we recommend 328.5±1.1 Ma, and for biotite HD-B1 a more precise value of 24.18±0.09 Ma.
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DOI:
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发表时间:
2006
期刊:
影响因子:
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作者:
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通讯作者:
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DOI:
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1993
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1987
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DOI:
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2005
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通讯作者:
R. Altherr
DOI:
--
发表时间:
2003
期刊:
影响因子:
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作者:
M. Trieloff;M. Falter;E. Jessberger
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