| 辽南与苏皖北部新元古代地层Sr和C同位素对比及年龄界定 |
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| 引用本文： | 郑文武,杨杰东,洪天求,陶仙聪,王宗哲.辽南与苏皖北部新元古代地层Sr和C同位素对比及年龄界定[J].高校地质学报,2004,10(2):165-178. |
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| 作者姓名： | 郑文武 杨杰东 洪天求 陶仙聪 王宗哲 |
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| 作者单位： | 1. 合肥工业大学资源与环境工程学院，合肥 230009 ; 2. 南京大学现代分析中心，南京 210093; 3. 南京大学 金属矿床成矿机制研究国家重点实验室, 南京 210093; 4. 中国科学院南京地质古生物研究所，南京 210008 |
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| 基金项目： | 国家自然科学基金资助项目 (编号 :4 9872 0 12，4 98730 0 4 ) |
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| 摘 要： | 采用Sr，C同位素地层学方法，对苏皖北部和辽南地区新元古代地层中碳酸盐岩进行了系统的采样和测试，并将其测试结果与新元古代海水Sr，C同位素组成演变曲线相比较，试图从中获得研究区有关地层自然层序、形成时限范围及其有关同位素年龄数据取舍等方面新的信息。研究结果表明，研究区的新元古代淮南群、徐淮群、宿县群和细河群、五行山群、金县群等，均形成于南沱冰期或Sturtian冰期之前，为900～700Ma。并且进一步印证了淮南生物群应该属于前伊迪卡拉期的一次重要的生物大爆发。
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| 关 键 词： | Sr和C同位素 新元古代地层 同位素年龄 安徽 江苏 辽宁 |
| 文章编号： | 1006-7493(2003)02-165-14 |
| 修稿时间： | 2003年8月5日 |
Sr and C Isotopic Correlation and the Age Boundary Determination for the Neoproterozoic in the Southern Liaoning and Northern Jiangsu-Northern Anhui Provinces |
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| ZHENG Wen-wu ,YANG Jie-dong ,HONG Tian-qiu TAO Xian-cong ,WANG Zong-zhe.Sr and C Isotopic Correlation and the Age Boundary Determination for the Neoproterozoic in the Southern Liaoning and Northern Jiangsu-Northern Anhui Provinces[J].Geological Journal of China Universities,2004,10(2):165-178. |
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| Authors: | ZHENG Wen-wu YANG Jie-dong HONG Tian-qiu TAO Xian-cong WANG Zong-zhe |
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| Institution: | 1. Institute of the Resources and Enviroment Engineering, Hefei University of Technology, Hefei 230009, China; 2. Center of Modern Analysis, Nanjing University, Nanjing 210093, China; 3. State Key Laboratory for Mineral Deposits Research, Nanjing University, Nanjing 210093, China; 4. Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China |
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| Abstract: | According to the methods of Sr and C isotopic stratigraphy,limestone samples were systematically collected from the Neoproterozoic successions in northern Jiangsu,northern Anhui and southern Liaoning Provinces. New findings,such as the physical sequences of the strata,the depositional ages,and the choice of the isotopic geochronologic data of the study area,were obtained by comparing the Sr and C isotope compositions with the evolution curves of the Sr and C isotopes for the Neoproterozoic and Cambrian seawater. The findings suggested that the Huainan Group,the Xihe Group and the Wuxingshan Group in the studied regions were all formed 900 Ma to 700 Ma ago,a period before the Nantuo ice period or the Sturtian ice period,and it is proved further that the Huainan Biota should be one important life explosion that belongs to the pre-Ediacaran period. |
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| Keywords: | Sr and C isotopes Neoproterozoic strata isotopic ages Anhui Province Jiangsu Province Liaoning Province |
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