The U-Pb ages, Hf isotope and REE patterns of older zircons from Devonian volcanic rocks in Ashele basin on the southern margin of Altai orogen and its geological significance
文献类型：期刊论文
| 作者 | Song GuoXue; Qin KeZhang; Liu TieBing; Li GuangMing; Shen Ping |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2010-10-01 |
| 卷号 | 26期号:10页码:2946-2958 |
| 关键词 | Altai erogenic belt Dacite sample Zircon U-Pb dating Hf isotope Ce negative anomaly Precambrian crystalline basement Columbia super-continent |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | There are four Devonian marine volcano-sedimentary basins on the southern margin of Altai orogenic belt. The Ashele large-scale Cu-Zn deposit occurred in the Ashele basin which located in the northwest of Altai, and lots of research works have been down on it, but the age of its ore-hosting volcanic rock has not been clearly determined so far. In this paper. LA-ICP-MS zircon U-Pb dating, zircon Hf isotopes and REE patterns were used for researching on the Devonian volcanic rocks in Ashele Cu-Zn district. The concordant age of 1985 +/- 8. 9Ma and the weighted age of 2005 +/- 30Ma of a group of older zircons from volcanic rocks by the zircon U-Pb dating represent the forming age of the Precambrian crystalline basement in Altai region, their Th/U values range is 0. 25 similar to 0. 90, and the epsilon(Hf)(t) values range is - 1. 4 similar to + 8. 5, with an average value of 3. 3; Another group of new zircons have the age of 408 +/- 8Ma, and have a typical features of magmatic zircons with the epsilon(Hf)( t) value of 9. 3 and Th/U value of 0. 49, on behalf of the age of a volcanic activity in the peak time of the Early Devonian magmatism. The Sigma REE of old zircons changed from the lowest of 1015 x 10(-6) to the highest 3486 x 10(-6), show the characteristics of depleting in LREE and enriching in HREE; the emergence of negative anomalies of Ce element is the salient feature which is different from normal magmatic zircon in this group of zircons. Zircon U-Pb ages, Hf isotopes and Ce negative anomaly implied that Altai Precambrian crystalline basement may be formed in the background of gathering together of Columbia super-continent, and its source material came from the non-uniform mixing of the reducing mantle materials and oxidized crustal materials. |
| WOS关键词 | RARE-EARTH-ELEMENTS ; LU-HF ; TECTONIC IMPLICATIONS ; NORTHWEST CHINA ; TRACE-ELEMENT ; EVOLUTION ; ACCRETIONARY ; GROWTH ; CRUST ; BELT |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000284450800007 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/72424]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Song GuoXue |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Song GuoXue,Qin KeZhang,Liu TieBing,et al. The U-Pb ages, Hf isotope and REE patterns of older zircons from Devonian volcanic rocks in Ashele basin on the southern margin of Altai orogen and its geological significance[J]. ACTA PETROLOGICA SINICA,2010,26(10):2946-2958. |
| APA | Song GuoXue,Qin KeZhang,Liu TieBing,Li GuangMing,&Shen Ping.(2010).The U-Pb ages, Hf isotope and REE patterns of older zircons from Devonian volcanic rocks in Ashele basin on the southern margin of Altai orogen and its geological significance.ACTA PETROLOGICA SINICA,26(10),2946-2958. |
| MLA | Song GuoXue,et al."The U-Pb ages, Hf isotope and REE patterns of older zircons from Devonian volcanic rocks in Ashele basin on the southern margin of Altai orogen and its geological significance".ACTA PETROLOGICA SINICA 26.10(2010):2946-2958. |
入库方式： OAI收割
来源：地质与地球物理研究所
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