Palaeoproterozoic Khondalite Belt in the western North China Craton: New evidence from SHRIMP dating and Hf isotope composition of zircons from metamorphic rocks in the Bayan Ul-Helan Mountains area
文献类型：期刊论文
| 作者 | Dong ChunYan; Liu DunYi; Li JunJian; Wan YuSheng; Zhou HongYing; Li ChengDong; Yang YueHeng; Xie LieWen |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2007-11-01 |
| 卷号 | 52期号:21页码:2984-2994 |
| 关键词 | Khondalite Belt Palaeoproterozoic SHRIMP dating Helan Mountains North China Craton |
| ISSN号 | 1001-6538 |
| DOI | 10.1007/s11434-007-0404-9 |
| 文献子类 | Article |
| 英文摘要 | Zircom U-Pb age and Hf isotope analyses were made on gneissic granite and garnet-mica two-feldspar gneiss from the Helanshan Group in the Bayan Ul-Helan Mountains area, the western block of the North China Craton (NCC). Zircons from the gneissic granite commonly show core-mantle-rim structures, with magmatic core, metamorphic mantle and rim having ages of 2323 +/- 20 Ma, 1923 +/- 28 Ma and 1856 +/- 12 Ma, respectively. The core, mantle and rim show similar Hf isotope compositions, with single-stage depleted mantle model ages (T (DM1)) of 2455 to 2655 Ma (19 analyses). Most of the detrital zircons from the garnet-mica two-feldspar paragneiss have a concentrated U-Pb age distribution, with a weighted mean Pb-207/Pb-206 age of 1978 +/- 17 Ma. A few detrital zircons are older (2871 to 2469 Ma). The age for metamorphic overgrown rim was not determined because of strong Pb loss due to their high U content. The zircons show large variation in Hf isotope composition, with T (DM1) ages of 1999 to 3047 Ma. In combination with previous studies, the main conclusions are as follows: (1) protolith of the khondalite series in the Helanshan Group formed during Palaeoproterozoic rather than the Archaean as previously considered; (2) The results lend support to the contention that there is a huge Palaeoproterozoic Khondalite (metasedimentary) Belt between the Yinshan Mountains Block and the Ordos Block in the Western Block of NCC; (3) The widely-distributed bodies of early Palaeoproterozoic orthogneisses in the Khondalite Belt might be one of the important sources for detritus material in the khondalite series; (4) Collision between the Yinshan Block, the Ordos Block and the Eastern Block occurred in the same tectonothermal event of late Palaeoproterozoic, resulting in the final assembly of the NCC. |
| WOS关键词 | ULTRAHIGH-PRESSURE ECLOGITE ; METASEDIMENTARY ROCKS ; TECTONIC EVOLUTION ; PB GEOCHRONOLOGY ; DETRITAL ZIRCONS ; SOUTH CHINA ; LU-HF ; CONSTRAINTS ; COMPLEX ; AGE |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000250463400016 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/68126]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Dong ChunYan |
| 作者单位 | 1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 2.Beijing SHRIMP Ctr, Beijing 100037, Peoples R China 3.China Geol Survey, Tianjin Inst Geol & Mineral Resources, Tianjin 300170, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dong ChunYan,Liu DunYi,Li JunJian,et al. Palaeoproterozoic Khondalite Belt in the western North China Craton: New evidence from SHRIMP dating and Hf isotope composition of zircons from metamorphic rocks in the Bayan Ul-Helan Mountains area[J]. CHINESE SCIENCE BULLETIN,2007,52(21):2984-2994. |
| APA | Dong ChunYan.,Liu DunYi.,Li JunJian.,Wan YuSheng.,Zhou HongYing.,...&Xie LieWen.(2007).Palaeoproterozoic Khondalite Belt in the western North China Craton: New evidence from SHRIMP dating and Hf isotope composition of zircons from metamorphic rocks in the Bayan Ul-Helan Mountains area.CHINESE SCIENCE BULLETIN,52(21),2984-2994. |
| MLA | Dong ChunYan,et al."Palaeoproterozoic Khondalite Belt in the western North China Craton: New evidence from SHRIMP dating and Hf isotope composition of zircons from metamorphic rocks in the Bayan Ul-Helan Mountains area".CHINESE SCIENCE BULLETIN 52.21(2007):2984-2994. |
入库方式： OAI收割
来源：地质与地球物理研究所
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