Single grain Rb-Sr isotopic analysis of GA-1550 biotite, LP-6 biotite and Bern-4M muscovite Ar-40-Ar-39 dating standards
文献类型：期刊论文
| 作者 | Li, Qiu-Li1,2; Chen, Fukun1,3; Li, Xiang-Hui1,3; Wang, Fei3; He, Huai-Yu3 |
| 刊名 | GEOCHEMICAL JOURNAL
 |
| 出版日期 | 2008 |
| 卷号 | 42期号:3页码:263-271 |
| 关键词 | Rb-Sr isotopic systematics standard mica GA-1550 biotite LP-6 biotite Bern-4M muscovite |
| ISSN号 | 0016-7002 |
| 文献子类 | Article |
| 英文摘要 | Three standard minerals GA-1550 biotite, LP-6 biotite and Bern-4M muscovite used for K-Ar and Ar-40-Ar-39 dating have been investigated by the single grain Rb-Sr technique. Compared to the K-Ar and Ar-40-Ar-39 results previously reported, these mica standards nevertheless show complex characteristics in the Rb-Sr isotopic system. Analysis on eight individual grains of GA-1550 biotite gives a Rb-Sr isochron age of 98.7 +/- 1.9 Ma, consistent with previous dating results of the K-Ar and stepwise heating and laser ablation Ar-40-Ar-39 methods. Although evidence of the laser ablation 40Ar-Ar-39 analyses in many previous studies demonstrates that LP-6 biotite is considerably inhomogeneous in the K-Ar isotopic system, Rb-Sr isotopic analyses on ten individual biotite grains show achievement of Sr isotopic equilibrium during crystallization. A Rb-Sr isochron age of 128.2 +/- 2.2 Ma calculated from the analytical results is concordant with those previously reported K-Ar and Ar-40-Ar-39 ages obtained from c. 30 mg aliquots of biotite grains. Excellent age reproducibility on Bern-4M muscovite was previously achieved by K-Ar and Ar-40-Ar-39 dating by total fusion in c. 30 mg aliquots of muscovite grains, but single grain Rb-Sr analytical results in this study demonstrate considerable disequilibrium of Sr isotopic system during crystallization of muscovite. The discordance in the Rb-Sr and K-Ar isotopic systems of two standard minerals indicates complex factors that can influence isotopic disequilibrium of both isotopic systems. |
| WOS关键词 | HIGH-PRESSURE METAMORPHISM ; K-FELDSPAR MEGACRYSTS ; FISH CANYON TUFF ; EXCESS ARGON ; WESTERN ALPS ; LASER PROBE ; SESIA ZONE ; AR-40/AR-39 ; INTERCALIBRATION ; PHENGITES |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000261047700004 |
| 出版者 | GEOCHEMICAL SOC JAPAN |
| 资助机构 | National Natural Science Foundation of China(40525007) ; National Natural Science Foundation of China(40525007) ; National Natural Science Foundation of China(40525007) ; National Natural Science Foundation of China(40525007) ; Ministry of Science and Technology of China(2006CB403505) ; Ministry of Science and Technology of China(2006CB403505) ; Ministry of Science and Technology of China(2006CB403505) ; Ministry of Science and Technology of China(2006CB403505) ; National Natural Science Foundation of China(40525007) ; National Natural Science Foundation of China(40525007) ; National Natural Science Foundation of China(40525007) ; National Natural Science Foundation of China(40525007) ; Ministry of Science and Technology of China(2006CB403505) ; Ministry of Science and Technology of China(2006CB403505) ; Ministry of Science and Technology of China(2006CB403505) ; Ministry of Science and Technology of China(2006CB403505) ; National Natural Science Foundation of China(40525007) ; National Natural Science Foundation of China(40525007) ; National Natural Science Foundation of China(40525007) ; National Natural Science Foundation of China(40525007) ; Ministry of Science and Technology of China(2006CB403505) ; Ministry of Science and Technology of China(2006CB403505) ; Ministry of Science and Technology of China(2006CB403505) ; Ministry of Science and Technology of China(2006CB403505) ; National Natural Science Foundation of China(40525007) ; National Natural Science Foundation of China(40525007) ; National Natural Science Foundation of China(40525007) ; National Natural Science Foundation of China(40525007) ; Ministry of Science and Technology of China(2006CB403505) ; Ministry of Science and Technology of China(2006CB403505) ; Ministry of Science and Technology of China(2006CB403505) ; Ministry of Science and Technology of China(2006CB403505) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/69216]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Chen, Fukun |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Lab Radiogenic Isotope Geochem, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Qiu-Li,Chen, Fukun,Li, Xiang-Hui,et al. Single grain Rb-Sr isotopic analysis of GA-1550 biotite, LP-6 biotite and Bern-4M muscovite Ar-40-Ar-39 dating standards[J]. GEOCHEMICAL JOURNAL,2008,42(3):263-271. |
| APA | Li, Qiu-Li,Chen, Fukun,Li, Xiang-Hui,Wang, Fei,&He, Huai-Yu.(2008).Single grain Rb-Sr isotopic analysis of GA-1550 biotite, LP-6 biotite and Bern-4M muscovite Ar-40-Ar-39 dating standards.GEOCHEMICAL JOURNAL,42(3),263-271. |
| MLA | Li, Qiu-Li,et al."Single grain Rb-Sr isotopic analysis of GA-1550 biotite, LP-6 biotite and Bern-4M muscovite Ar-40-Ar-39 dating standards".GEOCHEMICAL JOURNAL 42.3(2008):263-271. |
入库方式： OAI收割
来源：地质与地球物理研究所
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