Geological relation of Late Archean lithologic units in Northwest Hebei, North China Craton: Implication for building of early continental crust
文献类型：期刊论文
| 作者 | Peng Peng; Li Yun; Liu Fu; Wang Fang |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2012-11-01 |
| 卷号 | 28期号:11页码:3531-3544 |
| 关键词 | North China Craton Late Archean Crust structure Volcano-sedimentary sequences grey gneisses (TTG gneisses) Hongqiyingzi Group |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | In Northwest Hebei Province, North China Craton, the Late Archean units include grey gneisses-dominated Sanggan and Chongli complexes and amphibolite-facies volcano-sedimentary sequence, the Hongqiyingzi Group. In this paper, zircon grains from a meta-basaltic-andesite sample (amphibole plagioclase gneiss) from the Hongqiyingzi Group in Huangtuyao-Wushijia area, Shangyi, was dated using LA-MC-ICPMS method. A weighted mean Pb-207/Pb-206 age of 2528 +/- 12Ma (2 sigma, MSWD = 0.1, n = 34) was obtained, and this age is interpreted as igneous age of the rock. Although this age is close to the ages of the grey gneisses in this area, field relations clearly show that the Hongqiyingzi Group has formed earlier. In the grey gneiss domain, pieces of the Hongqiyingzi Group and other meta-gabbros appear as sheets, lens or "dyke"-like bands. These lens and bands sometimes have numbers of lined smaller lens around the main bodies, with no fine-grained margins and intrusive branches, which can distinguish from the Paleoproterozoic mafic dykes (also metamorphosed) in this same area. These gabbroic sheets could be roots or partly the magma chamber relics of the Hongqiyingzi Group, or they could also be partly the remanents of ancient crust. Element and isotope geochemistry show that the volcanics are akin of grey gneisses or dioritic intrusions in the grey gneisses in this area. Both geological relations and geochemistry show that these volcanic rocks may have similar origins with the grey gneisses and dioritic rocks. According to the geological relationships of the Late Archean units in this area, the volcano-sedimentary sequence (the Hongqiyingzi Group) and the grey gneiss complex (Sanggan and Chongli complexes) composed a 2-dimension Late Archean crust structure. Identifying the spatial continuity of such crustal structure, as well as the time and material evolution of the related units, can reveal the forming mechanism of Late Archean continental crust in the North China Craton. |
| WOS关键词 | HIGH-PRESSURE GRANULITES ; PB ZIRCON GEOCHRONOLOGY ; GREENSTONE-BELT ; LU-HF ; EVOLUTION ; TECTONICS ; COMPLEX ; MANTLE ; GEOCHEMISTRY ; PETROGENESIS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000312572600008 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/84568]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Peng Peng |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Peng Peng,Li Yun,Liu Fu,et al. Geological relation of Late Archean lithologic units in Northwest Hebei, North China Craton: Implication for building of early continental crust[J]. ACTA PETROLOGICA SINICA,2012,28(11):3531-3544. |
| APA | Peng Peng,Li Yun,Liu Fu,&Wang Fang.(2012).Geological relation of Late Archean lithologic units in Northwest Hebei, North China Craton: Implication for building of early continental crust.ACTA PETROLOGICA SINICA,28(11),3531-3544. |
| MLA | Peng Peng,et al."Geological relation of Late Archean lithologic units in Northwest Hebei, North China Craton: Implication for building of early continental crust".ACTA PETROLOGICA SINICA 28.11(2012):3531-3544. |
入库方式： OAI收割
来源：地质与地球物理研究所
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