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http://www.igeodata.org/handle/20.500.11758/344
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DC 字段 | 值 | 语种 |
---|---|---|
所有者 | Yusheng Wan | - |
所有者 | Xianzheng Zhao | - |
所有者 | Zejiu Wang | - |
所有者 | Dunyi Liu | - |
所有者 | Alfred Kröner | - |
所有者 | Chunyan Dong | - |
所有者 | Hangqian Xie | - |
所有者 | Yuansheng Geng | - |
所有者 | Yuhai Zhang | - |
所有者 | Runlong Fan | - |
所有者 | Huiyi Sun | - |
获取日期 | 2017-03-07T03:20:35Z | - |
获取日期 | 2017-03-07T03:20:35Z | - |
首次发表日期 | 2014-02 | - |
引用地址 | http://www.igeodata.org/handle/20.500.11758/344 | - |
摘要 | The Central Hebei Basin (CHB) is one of the largest sedimentary basins in the North China Craton, extending in a northeastesouthwest direction with an area of >350 km 2 . We carried out SHRIMP zircon dating, Hf-in-zircon isotopic analysis and a whole-rock geochemical study on igneous and metasedi- mentary rocks recovered from drill holes that penetrated into the basement of the CHB. Two samples of gneissic granodiorite (XG1-1) and gneissic quartz diorite (J48-1) have magmatic ages of 2500 and 2496 Ma, respectively. Their zircons also record metamorphic ages of 2.41e2.51 and w2.5 Ga, respec- tively. Compared with the gneissic granodiorite, the gneissic quartz diorite has higher SREE contents and lower Eu/Eu* and (La/Yb) n values. Two metasedimentary samples (MG1, H5) mainly contain w2.5 Ga detrital zircons as well as late Paleoproterozoic metamorphic grains. The zircons of different origins have ε Hf (2.5 Ga) values and Hf crustal model ages ranging from 0 to 5 and 2.7 to 2.9 Ga, respectively. Therefore, w2.5 Ga magmatic and Paleoproterozoic metasedimentary rocks and late Neoarchean to early Paleoproterozoic and late Paleoproterozoic tectono-thermal events have been identified in the basement beneath the CHB. Based on regional comparisons, we conclude that the early Precambrian basement beneath the CHB is part of the North China Craton. | zh_CN |
语种 | en | zh_CN |
出版者 | Institute of Geology Chinese Academy of Geological Sciences | zh_CN |
主题关键词 | Early Precambrian | zh_CN |
主题关键词 | North China | zh_CN |
主题关键词 | Craton Drill hole | zh_CN |
主题关键词 | Zircon dating | zh_CN |
成果名称 | SHRIMP zircon dating and LA-ICPMS Hf analysis of early Precambrian rocks from drill holes into the basement beneath the Central Hebei Basin, North China Craton | zh_CN |
类型 | Book | zh_CN |
所属集合: | 科技成果 |
文件中的条目:
条目 | 描述 | 大小 | 格式 | |
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Early Neoarchean (∼2.7 Ga) tectono-thermal events in the NorthChina Craton.pdf | 4.5 MB | Adobe PDF |
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