| 北京密云元古宙环斑花岗岩古风化壳及其与长城系常州沟组的关系 |
| |
| 引用本文： | 和政军,张新元,牛宝贵,刘仁燕,赵磊.北京密云元古宙环斑花岗岩古风化壳及其与长城系常州沟组的关系[J].地学前缘,2011,18(4):123-130. |
| |
| 作者姓名： | 和政军 张新元 牛宝贵 刘仁燕 赵磊 |
| |
| 作者单位： | 1. 中国地质科学院 地质研究所,北京,100037
2. 中国地质调查局 发展研究中心,北京,100037 |
| |
| 基金项目： | 国家自然科学基金项目(40872081); 中国地质调查局项目(1212010611808,1212011085476) |
| |
| 摘 要： | 华北地区长城系在中国元古宙研究中占有相当重要的地位,其底界是目前划分古、中元古界的重要界线标志.长期以来,由于在靠近长城系底部缺少可定年的岩层或地质体,其底界年龄一直难以确定.近年来笔者在北京密云地区,发现了长城系常州沟组砂岩层直接覆盖在发育有古风化壳的环斑花岗岩(脉)之上.风化壳物质的组成主要为环斑花岗岩的原地风化岩...
|
| 关 键 词： | 古风化壳-碎屑岩 环斑花岗岩 常州沟组 元古宙长城系 北京 |
The paleo-weathering mantle of the Proterozoic rapakivi granite in Miyun County,Beijing and the relationship with the Changzhougou Formation of Changchengian System. |
| |
| He Zhengjun,Zhang Xinyuan,Niu Baogui,Liu Renyan,Zhao Lei.The paleo-weathering mantle of the Proterozoic rapakivi granite in Miyun County,Beijing and the relationship with the Changzhougou Formation of Changchengian System.[J].Earth Science Frontiers,2011,18(4):123-130. |
| |
| Authors: | He Zhengjun Zhang Xinyuan Niu Baogui Liu Renyan Zhao Lei |
| |
| Institution: | He Zhengjun1,Zhang Xinyuan2,Niu Baogui1,Liu Renyan1,Zhao Lei11.Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China2.Development Research Center of China Geological Survey,China |
| |
| Abstract: | The Changchengian System,with its basal boundary being a key to the delimitation between the Paleo-and the Meso-Proterozoic in the North China Platform,serves actually as an absorbing Proterozoic research field in Chinese geological circle.For a long time it has been difficult to precisely delimit the intra-Proterozoic ages of North China and their global stratigraphic correlations has been controversial because of lack of available rocks or bodies for age dating.In resent years,the Proterozoic rapakivi gra... |
| |
| Keywords: | paleo-weathering mantle-clastic rocks rapakivi granite Changzhougou Formation Changchengian System of Proterozoic Beijing |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《地学前缘》浏览原始摘要信息 |
| 点击此处可从《地学前缘》下载免费的PDF全文 |
|
