Ar-40/Ar-39 analysis of supergene yavapaiite and preliminary investigation on Ar closure temperature
文献类型：期刊论文
| 作者 | Yang Jing1; Zheng DeWen1; Li DaMing1; Xu YingXia2,3; Yu ShuYan3 |
| 刊名 | SCIENCE CHINA-EARTH SCIENCES
 |
| 出版日期 | 2012-12-01 |
| 卷号 | 55期号:12页码:1996-2004 |
| 关键词 | yavapaiite Ar-40/Ar-39 closure temperature temperature grain size age |
| ISSN号 | 1674-7313 |
| DOI | 10.1007/s11430-012-4491-3 |
| 文献子类 | Article |
| 英文摘要 | Yavapaiite (KFe(SO4)(2)) is a new sulfate mineral with high potassium content, discovered in the oxidation zone of non-ferrous metal mining in the Tu-Ha Basin, Xinjiang Uygur Autonomous Region, northwestern China. Dating of this mineral by the K-Ar and Ar-40/Ar-39 method allows us to study the time and process of the region's aridity, and further we can provide some insight into the influence of not only the Tibetan Plateau uplift but also formation and evolution of polar ice caps on climate of this region. However, as the temperature of this region is up to 60A degrees C in summer, it is still questionable whether this high temperature causes the diffusive loss of Ar-40 from yavapaiite in a long time, or whether the fine grain of the mineral can lead to diffusive loss of Ar-40 from yavapaiite. These are important for interpreting the mineral age data. According to diffusion theory, we use Ar-40/Ar-39 step heating experiment to determine the apparent Ar diffusivity. Then we present a simple model of diffusive loss and radiogenic in-growth to evaluate the effect of extreme high ambient temperature and the grain size upon the Ar age. The experimental results show that the diffusion parameters as follows: the activation energy E (a) is 71.30 kcal/mol and the frequency factor logD (0)/a (2) is 13.71/s, the corresponding closure temperature T (c) is 294A degrees C (assuming a cooling rate of 10A degrees C/Ma), and the activation energy and closure temperature are very high. The simulation results show that the high ambient temperature and the grain size have no effect on the Ar age after yavapaiite was precipitated. Furthermore, the reproducibility of the age attests to the suitability of supergene yavapaiite for K-Ar and Ar-40/Ar-39 dating. |
| WOS关键词 | PORPHYRY COPPER PROVINCE ; CU-AU DEPOSIT ; NORTHERN CHILE ; EASTERN TIANSHAN ; K-AR ; GEOCHRONOLOGY ; MINERALIZATION ; EVOLUTION ; PERU ; GLACIATION |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000312346200007 |
| 出版者 | SCIENCE PRESS |
| 资助机构 | State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration(LED2009A05) ; State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration(LED2009A05) ; State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration(LED2009A05) ; State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration(LED2009A05) ; State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration(LED2009A05) ; State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration(LED2009A05) ; State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration(LED2009A05) ; State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration(LED2009A05) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/84480]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Yang Jing |
| 作者单位 | 1.China Earthquake Adm, Inst Geol, State Key Lab Earthquake Dynam, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 3.Hebei Polytech Univ, Dept Geol, Tangshan 063009, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang Jing,Zheng DeWen,Li DaMing,et al. Ar-40/Ar-39 analysis of supergene yavapaiite and preliminary investigation on Ar closure temperature[J]. SCIENCE CHINA-EARTH SCIENCES,2012,55(12):1996-2004. |
| APA | Yang Jing,Zheng DeWen,Li DaMing,Xu YingXia,&Yu ShuYan.(2012).Ar-40/Ar-39 analysis of supergene yavapaiite and preliminary investigation on Ar closure temperature.SCIENCE CHINA-EARTH SCIENCES,55(12),1996-2004. |
| MLA | Yang Jing,et al."Ar-40/Ar-39 analysis of supergene yavapaiite and preliminary investigation on Ar closure temperature".SCIENCE CHINA-EARTH SCIENCES 55.12(2012):1996-2004. |
入库方式： OAI收割
来源：地质与地球物理研究所
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