| 富Nb玄武岩在冀北前寒武纪地区的发现 |
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| 引用本文： | 王仁民,凤永刚,程素华.富Nb玄武岩在冀北前寒武纪地区的发现[J].高校地质学报,2007,13(3):458-462. |
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| 作者姓名： | 王仁民 凤永刚 程素华 |
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| 作者单位： | 北京大学,地球与空间科学学院,造山带与大陆演化教育部国家重点实验室,北京,100871;中国地质大学(北京)地球科学与资源学院,北京 |
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| 基金项目： | 国家自然科学基金项目(40472096) |
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| 摘 要： | 在冀北太古代麻粒岩带与北侧的古元古代红旗营子群之间，沿古断裂带存在一系列古洋壳残片。最近发现其中广泛存在在其它地区罕见的富Nb玄武岩，Nb含量大于7×10-6，Nb/Th+Nb/La大于0.6，为古洋壳的厘定提供了新的佐证，为早前寒武纪地质构造演化研究提供了重要信息。
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| 关 键 词： | 富Nb玄武岩 前寒武纪 冀北 |
| 文章编号： | 1006-7493（2007）03-0458-05 |
| 收稿时间： | 2007-09-20 |
| 修稿时间： | 2007-05-07 |
Discovery of the Precambrian Nb-Enriched Basalts in the Northern Hebei Province |
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| WANG Ren-min,FENG Yong-gang,CHENG Su-hua.Discovery of the Precambrian Nb-Enriched Basalts in the Northern Hebei Province[J].Geological Journal of China Universities,2007,13(3):458-462. |
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| Authors: | WANG Ren-min FENG Yong-gang CHENG Su-hua |
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| Affiliation: | 1. Key Laboratory of Orogenic Belts and Crustal Evolution of Ministry of Education,School of Earth and Space Sciences, Peking University, Beijing 100871, China;2. School of Geosciences and Resources, China University of Geosciences, Beijing 100083, China |
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| Abstract: | There are a series of ancient oceanic crust relics along the fracture belt between the Archean granulite belt and the Paleoproterozoic Hongqiyingzi group in the North Hebei Province. Recently we have found widespread Nb-enriched basalt (Nb > 7×10-6 and Nb/Th+Nb/La > 0.6 ) in this area, which is very rare in other regions. The discovery will provide powerful proof for distinguishing ancient oceanic crust and will also supply important information for the Precambrian geological and tectonic evolution. |
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| Keywords: | Nb-enriched basalts Precambrian Northern Hebei Province |
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