Zircon SHRIMP geochronology of the Xinkailing-Kele complex in the northwestern Lesser Xing'an Range, and its geological implications
文献类型：期刊论文
| 作者 | Miao, LC; Fan, WM; Zhang, FQ; Liu, DY; Jian, P; Shi, GH; Tao, H; Shi, YR |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2004 |
| 卷号 | 49期号:2页码:201-209 |
| 关键词 | zircon SHRIMP geochronology Xinkailing-Kele complex Lesser Xing'an Range |
| ISSN号 | 1001-6538 |
| DOI | 10.1360/03wd0316 |
| 文献子类 | Article |
| 英文摘要 | Located in the eastern portion of the Xing' an-Mongolian Orogenic Belt (XMOB), the Xinkailing-Kele complex has previously been considered to be Precambrian metamorphic rocks, mainly according to its relatively high metamorphic grade. Our filed observation, however, revealed that the complex is composed mainly of metamorphic rocks (Kele complex), tectono-schists ("Xinkailing Group"), and granitoids (Xinkailing granitic complex). Dating on these rocks using advanced SHRIMP zircon U-Pb technique indicates that: (1) Biotite-plagioclase gneiss from the Kele complex has a protolith age of 337 +/- 7 Ma (2sigma) and a metamorphic age of 216+/-3 Ma (2sigma); (2) the tectono-schist of the "Xinkailing Group" gave a magmatic age of 292+/-6 Ma (2sigma), indicative of felsic volcanic protolith of the schist formed in Late Paleozoic time; and (3) the Menluhedingzi and Lengchuan granites of the Xinkailing granitic complex were emplaced at 167+/-4 (2sigma) and 164+/-4 Ma (2sigma), respectively. These results suggest that the Xinkailing-Kele complex is not Precambrian metamorphic rocks and the so-called Precambrian "Nenjiang Block" does essentially not exist. In combination with regional geological data, we propose that the Kele metamorphic complex is likely related to a collisional tectonism that took place in Triassic time, as indicted by its metamorphic age of 216+/-3 Ma. The Xinkailing granitic complex was emplaced along the collisional zone during Mid-Jurassic time, likely in a post-orogenic or anorogenic setting. |
| WOS关键词 | A-TYPE GRANITES ; GEOCHEMICAL CONSTRAINTS ; CRUSTAL GROWTH ; INNER-MONGOLIA ; NE CHINA ; PETROGENESIS ; AGE ; PB |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000220239800016 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/79279]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Miao, LC |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Geol Sci, SHRIMP Lab, Inst Geol, Beijing 100037, Peoples R China |
| 推荐引用方式 GB/T 7714 | Miao, LC,Fan, WM,Zhang, FQ,et al. Zircon SHRIMP geochronology of the Xinkailing-Kele complex in the northwestern Lesser Xing'an Range, and its geological implications[J]. CHINESE SCIENCE BULLETIN,2004,49(2):201-209. |
| APA | Miao, LC.,Fan, WM.,Zhang, FQ.,Liu, DY.,Jian, P.,...&Shi, YR.(2004).Zircon SHRIMP geochronology of the Xinkailing-Kele complex in the northwestern Lesser Xing'an Range, and its geological implications.CHINESE SCIENCE BULLETIN,49(2),201-209. |
| MLA | Miao, LC,et al."Zircon SHRIMP geochronology of the Xinkailing-Kele complex in the northwestern Lesser Xing'an Range, and its geological implications".CHINESE SCIENCE BULLETIN 49.2(2004):201-209. |
入库方式： OAI收割
来源：地质与地球物理研究所
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