| 皖南上溪群中放射虫化石和古蛋类化石的发现及其古地理意义 |
| |
| 引用本文： | 陈冠宝,李红生,徐树桐,刘贻灿,胡远超,周栗.皖南上溪群中放射虫化石和古蛋类化石的发现及其古地理意义[J].古地理学报,2007,9(6):589-596. |
| |
| 作者姓名： | 陈冠宝 李红生 徐树桐 刘贻灿 胡远超 周栗 |
| |
| 作者单位： | 1.安徽省古生物化石科学研究所,安徽合肥230001;2.安徽省地质调查院,安徽合肥230001;3.中国科学院地质与地球物理研究所,北京100029;4.中国科学技术大学地球与空间科学学院,安徽合肥230026 |
| |
| 基金项目： | 国土资源部科研项目
,
安徽省国土资源厅科研项目 |
| |
| 摘 要： | 皖南上溪群出露于“江南古陆”东北部,自下而上分为樟前组、板桥组、木坑组/环沙组和牛屋组,前人根据其中岩体的同位素年龄推定其时代为中元古代。在 20世纪 80年代后期开展的江南古陆是古陆还是造山带的大讨论中,上溪群的时代问题成了一个关键问题,而且也是了解造山带形成时代的关键问题。作者新近在皖南歙县附近的上溪群中发现了早古生代的放射虫化石和古蛋类化石。这是一个新的重要发现,它证明宿主地层上溪群,或至少其中的牛屋组,应是早寒武世沉积,其古地理环境应是古海洋,而不是古陆。其隆起和变质作用则更晚。该发现对于在研究区乃至整个华南地区的古地理学研究和能源矿产（特别是石油和天然气）的预测和勘探都是有重要意义的。
|
| 关 键 词： | 皖南 上溪群 放射虫化石 古蛋类化石 古地理 “江南古陆” 古海洋 |
| 文章编号： | 1671-1505(2007)06-0589-08 |
| 收稿时间： | 2007-02-16 |
| 修稿时间： | 2007-06-10 |
Radiolarian and achaeooides fossils from the Shangxi Group and their palaeogeographic significance in South Anhui Province and their palaeogeographic significance |
| |
| Chen Guanbao,Li Hongsheng,Xu Shutong,Liu Yican,Hu Yuanchao,Zhou Li.Radiolarian and achaeooides fossils from the Shangxi Group and their palaeogeographic significance in South Anhui Province and their palaeogeographic significance[J].Journal of Palaeogeography,2007,9(6):589-596. |
| |
| Authors: | Chen Guanbao Li Hongsheng Xu Shutong Liu Yican Hu Yuanchao Zhou Li |
| |
| Institution: | 1.Anhui Institute of Palaeontology, Hefei230001, Anhui;2.Geological Survey of Anhui Province, Hefei230001, Anhui;3.Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029;4.School of Earth and Space Sciences, University of Science and Technology of China, Hefei230026, Anhui |
| |
| Abstract: | The Shangxi Group is distributed in the northeastern "Jiangnan Oldland" in southern Anhui Province. It was subdivided into:Zhangqian, Banqiao, Mukeng/Huansha and Niuwu Formations from the lower to upper, and was dated as the Mesoproterozoic based on the isotopic dating of the rocks. The hot discussion on "Oldland versus Orogen" of this region prevailing in the 1980s, mainly focused on the age of the Shangxi Group and it was the key problem in determining the age of the orogen as well. We recently found the Radiolarian and Archaeooides fossils in the Niuwu Formation near Shexian County, southern Anhui Province. It is a new important discovery. The newly discovered Radiolarian and Archaeooides fossils show that the host Shangxi Group, or at least the Niuwu Formation was deposited during the Early Cambrian. Its palaeogeographic background should be a palaeo-ocean environment but not an oldland. The uplifting and metamorphism in this region should have occurred later. Such a discovery is very important for the palaeogeographic research and prediction and exploration of mineral resources, especially the petroleum and natural gas in this region and in South China. |
| |
| Keywords: | southern Anhui Province Shangxi Group Radiolarian fossils Archaeooides fossils palaeogeography "Jiangnan Oldland" palaeo-ocean |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《古地理学报》浏览原始摘要信息 |
| 点击此处可从《古地理学报》下载免费的PDF全文 |
|
