YBCs sanidine: A new standard for 40Ar/39Ar dating

被引：30
作者：
Wang, Fei [1 ]
Jourdan, Fred [2 ,3 ]
Lo, Ching-Hua [4 ]
Nomade, Sebastien [5 ]
Guillou, Herve [5 ]
Zhu, Rixiang [1 ]
Yang, Liekun [1 ]
Shi, Wenbei [1 ]
Feng, Huile [1 ]
Wu, Lin [1 ]
Sang, Haiqing [1 ]
机构：
[1] Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
[2] Curtin Univ, JdL Ctr, Perth, WA 6845, Australia
[3] Curtin Univ, Dept Appl Geol, Perth, WA 6845, Australia
[4] Natl Taiwan Univ, Dept Geosci, Taipei 106, Taiwan
[5] LSCE, F-91198 Gif Sur Yvette, France
来源：
CHEMICAL GEOLOGY | 2014年 / 388卷
关键词：
40Ar/39Ar geochronology; New standard; YBCs sanidine; FISH CANYON SANIDINE; INTERCALIBRATION; AGE; GEOCHRONOLOGY; CALIBRATION; EVOLUTION; ARGON; REDETERMINATION; ABUNDANCES; QIANGTANG;
D O I：
10.1016/j.chemgeo.2014.09.003
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
The 40Ar/39Ar dating technique is based on neutron fluence monitors (standards). Recent investigation demonstrates that currently used standards are not as homogenous as believed and new standards are needed (Philips andMatchan, 2013). In this study, we report a newsanidine standard, YBCs, collected froma phonolite at Yabachi in Tibet, China, for single-grain 40Ar/39Ar dating. Aliquots were distributed to four international laboratories for analysis and intercalibration. The results show that YBCs crystals are homogenous in K content, 40Ar*/(39)A(Gamma K) (F-value) and age at the single grain level. The standard deviations of the F-value and age have small ranges from 0.29% to 0.53% and from 0.42% to 0.52%, respectively. These show that YBCs is a suitable standard for 40Ar/39Ar geochronology. The calibrated age of YBCs is 29.286 +/- 0.206 Ma, or neglecting the error in the decay constant, 29.286 +/- 0.045 Ma. Finally, the intercalibration factors (which allow direct comparison between standards) between YBCs and FCs, GA1550, ACs and HB3gr are calculated as: R-FCs(YBCs) = 1.044296 +/- 0.003968, R-GA1550(YBCs) = 0.291261 +/- 0.001148 R-ACs(YBCs) = 24.443066 +/- 0.068432 and R-HB3gr(YBCs) = 0.020312 +/- 0.000885. These values can be used to compare YBCs with other standards directly. (C) 2014 Elsevier B.V. All rights reserved. The 40Ar/39Ar dating technique is based on neutron fluence monitors (standards). Recent investigation demonstrates that currently used standards are not as homogenous as believed and new standards are needed (Philips andMatchan, 2013). In this study, we report a newsanidine standard, YBCs, collected froma phonolite at Yabachi in Tibet, China, for single-grain 40Ar/39Ar dating. Aliquots were distributed to four international laboratories for analysis and intercalibration. The results show that YBCs crystals are homogenous in K content, 40Ar*/(39)A(Gamma K) (F-value) and age at the single grain level. The standard deviations of the F-value and age have small ranges from 0.29% to 0.53% and from 0.42% to 0.52%, respectively. These show that YBCs is a suitable standard for 40Ar/39Ar geochronology. The calibrated age of YBCs is 29.286 +/- 0.206 Ma, or neglecting the error in the decay constant, 29.286 +/- 0.045 Ma. Finally, the intercalibration factors (which allow direct comparison between standards) between YBCs and FCs, GA1550, ACs and HB3gr are calculated as: R-FCs(YBCs) = 1.044296 +/- 0.003968, R-GA1550(YBCs) = 0.291261 +/- 0.001148 R-ACs(YBCs) = 24.443066 +/- 0.068432 and R-HB3gr(YBCs) = 0.020312 +/- 0.000885. These values can be used to compare YBCs with other standards directly. (C) 2014 Elsevier B.V. All rights reserved.
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收藏
页码：87 / 97
页数：11
相关论文
共 26 条
[1]   Intercalibration of 40Ar/39Ar dating standards [J].
Baksi, AK ;
Archibald, DA ;
Farrar, E .
CHEMICAL GEOLOGY, 1996, 129 (3-4) :307-324
[2]   Tibetan tectonic evolution inferred from spatial and temporal variations in post-collisional magmatism [J].
Chung, SL ;
Chu, MF ;
Zhang, YQ ;
Xie, YW ;
Lo, CH ;
Lee, TY ;
Lan, CY ;
Li, XH ;
Zhang, Q ;
Wang, YZ .
EARTH-SCIENCE REVIEWS, 2005, 68 (3-4) :173-196
[3]   An intercalibration study of the Fish Canyon sanidine and biotite 40Ar/39Ar standards and some comments on the age of the Fish Canyon Tuff [J].
Dazé, A ;
Lee, JKW ;
Villeneuve, M .
CHEMICAL GEOLOGY, 2003, 199 (1-2) :111-127
[4]   Geologic relationships and geochronology of the Cenozoic volcanoes and interbedded weathered mantles of Yulinshan in Qiangtang, North Tibet [J].
Ding, L ;
Zhou, Y ;
Zhang, JJ ;
Deng, WM .
CHINESE SCIENCE BULLETIN, 2000, 45 (24) :2214-2220
[5]   Postcollisional calc-alkaline lavas and xenoliths from the southern Qiangtang terrane, central Tibet [J].
Ding, Lin ;
Kapp, Paul ;
Yue, Yahui ;
Lai, Qingzhou .
EARTH AND PLANETARY SCIENCE LETTERS, 2007, 254 (1-2) :28-38
[6]  
Heri AR, 2014, GEOL SOC SPEC PUBL, V378, P69, DOI 10.1144/SP378.2
[7]   Low-degree melting of a metasomatized lithospheric mantle for the origin of Cenozoic Yulong monzogranite-porphyry, east Tibet: Geochemical and Sr-Nd-Pb-Hf isotopic constraints [J].
Jiang, YH ;
Jiang, SY ;
Ling, HF ;
Dai, BZ .
EARTH AND PLANETARY SCIENCE LETTERS, 2006, 241 (3-4) :617-633
[8]   Age calibration of the Fish Canyon sanidine 40Ar/39Ar dating standard using primary K-Ar standards [J].
Jourdan, Fred ;
Renne, Paul R. .
GEOCHIMICA ET COSMOCHIMICA ACTA, 2007, 71 (02) :387-402
[9]   Intercalibration of the Hb3gr 40Ar/39Ar dating standard [J].
Jourdan, Fred ;
Verati, Chrystele ;
Feraud, Gilbert .
CHEMICAL GEOLOGY, 2006, 231 (03) :177-189
[10]   ArArCALC - software for 40Ar/39Ar age calculations [J].
Koppers, AAP .
COMPUTERS & GEOSCIENCES, 2002, 28 (05) :605-619
123