Zircon U-Pb chronology of Longshan complex by LA-ICP-MS and its geological significance
文献类型：期刊论文
| 作者 | He, YH; Sun, Y; Chen, L; Li, HP; Yuan, HL; Liu, XM |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2005 |
| 卷号 | 21期号:1页码:125-134 |
| 关键词 | Long-shan Complex Zircon U-pb Chronology Ttg La-icp-ms North China Craton |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Longshan complex located in the southwestern margin of North China Craton (NCC), is a set of metamorphosed volcanic-sedimentary assemblage, including granitic gneisses, amphibolite, aluminum gneisses and marbles. Its tectonic position is comparable with the Lesser Qinling zone to the East. The granitic gneisses from Longxian -Guanshan cross section are geochemically high in SiO2 and Al-2 O-3 contents, and Na-2 O/K-2 O (> 2. 0), Sr/Y (> 20) and La/Yb ((N)) (> 10) ratios, resembling the geochemical characteristics of Archaean TTG (trondhjemite-tonalite-granodiorite) suite. The in situ U-Pb dating on zircons by LA-ICP-MS, yields three age groups at 1.90Ga (1.90 similar to 1.95Ga), 2.35Ga (2. 35 similar to 2.40Ga) and 2.50Ga (2. 45 similar to 2.50Ga).The analytical points for the first age group have a Th/U ratio ranging from 0 to 0.08, suggesting their metamorphic origin, whereas the analytical points for the last two age groups have Th/U ratios higher than 0.1, implying their igneous origin. And the 2.5Ga. represents the formation age of tonalitic gneisses. The geochemical and geochronologic results are closely related to the temporal evolution of the basement of the North China Craton, indicating that Longshan complex, together with Taihua complex, Sushui complex, Dengfeng complex, should make up the basement outcrops along southern margin of the North China Craton (NCC). The extensive and intensive 1.9 Gametamorphie events indicate the south margin of Ordos block are also affected by the Pre-Rodinia supercontinent event. |
| WOS关键词 | NORTH CHINA CRATON ; EVOLUTION |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000227476000012 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/65308]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | He, YH |
| 作者单位 | 1.NW Univ Xian, Minist Educ, Key Lab Continental Dynam, Xian 710069, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Geol Survey Shannxi Province, Xian 712000, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, YH,Sun, Y,Chen, L,et al. Zircon U-Pb chronology of Longshan complex by LA-ICP-MS and its geological significance[J]. ACTA PETROLOGICA SINICA,2005,21(1):125-134. |
| APA | He, YH,Sun, Y,Chen, L,Li, HP,Yuan, HL,&Liu, XM.(2005).Zircon U-Pb chronology of Longshan complex by LA-ICP-MS and its geological significance.ACTA PETROLOGICA SINICA,21(1),125-134. |
| MLA | He, YH,et al."Zircon U-Pb chronology of Longshan complex by LA-ICP-MS and its geological significance".ACTA PETROLOGICA SINICA 21.1(2005):125-134. |
入库方式： OAI收割
来源：地质与地球物理研究所
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