| 华北克拉通南缘鲁山太古宙基底的形成和演化 |
| |
| 引用本文： | 谢士稳,颉颃强,刘守偈,董春艳.华北克拉通南缘鲁山太古宙基底的形成和演化[J].中国地质,2016(6):1884-1893. |
| |
| 作者姓名： | 谢士稳 颉颃强 刘守偈 董春艳 |
| |
| 作者单位： | 中国地质科学院地质研究所, 北京离子探针中心, 北京 100037,中国地质科学院地质研究所, 北京离子探针中心, 北京 100037,中国地质科学院地质研究所, 北京离子探针中心, 北京 100037,中国地质科学院地质研究所, 北京离子探针中心, 北京 100037 |
| |
| 基金项目： | 国家自然科学基金项目（41402167）、中国地质科学院地质研究所基本科研业务经费（J1506）、中国地质调查局重点项目（12120114021301，12120113013700，1212010811033）和国家973项目（2012CB416600）联合资助。 |
| |
| 摘 要： | 鲁山地区保存和出露很好的太古宙基底岩石。文章报道了2件魏庄片麻岩的原岩年龄分别为(2867±5)Ma和(2768±5)Ma,变质作用时代分别为(2775±6)Ma和(2775±56)Ma。结合已发表数据,魏庄片麻岩原岩形成时代可大致分为2867~2928 Ma和2765~2768 Ma两个阶段;榆树庄片麻岩原岩形成于2829~2897 Ma、2752~2778 Ma和2723 Ma;斜长角闪岩原岩形成于2838~2845 Ma、2747~2794 Ma和2730 Ma。尽管三者岩性上存在差异,但原岩形成的期次和时代相当,指示它们在成因上可能存在联系。鲁山多地陆续发现2.8~2.9 Ga的岩石,表明该地区存在一定规模的中太古代基底。通过与胶东、霍邱等地对比,笔者认为华北克拉通南缘可能存在中太古代的古老陆块,其重要的初生地壳生长事件发生在2.9~3.0 Ga。
|
| 关 键 词： | 鲁山 锆石定年 中太古代 华北南缘 古老陆块 |
| 收稿时间： | 2016/10/10 0:00:00 |
| 修稿时间： | 2016/10/27 0:00:00 |
Archean crustal formation and evolution of the Lushan area in the southern margin of the North China Craton |
| |
| XIE Shi-wen,XIE Hang-qiang,LIU Shou-jie and DONG Chun-yan.Archean crustal formation and evolution of the Lushan area in the southern margin of the North China Craton[J].Chinese Geology,2016(6):1884-1893. |
| |
| Authors: | XIE Shi-wen XIE Hang-qiang LIU Shou-jie and DONG Chun-yan |
| |
| Institution: | Beijing SHRIMP Center, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China,Beijing SHRIMP Center, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China,Beijing SHRIMP Center, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China and Beijing SHRIMP Center, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China |
| |
| Abstract: | Archean basement rocks are well preserved in the Lushan area. In this study, zircon SHRIMP U-Pb dating results suggest that two samples, collected from the Weizhuang gneiss in Lushan, record magmatic age of 2867±5 Ma and 2768±5 Ma, respectively. They underwent metamorphism at 2775±6 Ma and 2775±56 Ma, respectively. Together with data available, the protoliths of the Weizhuang Gneiss formed at two stages, i.e., 2867-2928 Ma and 2765-2768 Ma, while protoliths of the Yushuzhuang Gneiss and amphibolite formed at three stages (2829-2897 Ma, 2752-2778 Ma and 2723 Ma versus 2838-2845 Ma, 2747-2794 Ma and 2730 Ma). Although the three types of rocks are different in lithology, they record similar magmatism phases, indicating the existence of genetic connections among them. Recently, 2.8-2.9 Ga rocks were identified in many areas, indicating the existence of Mesoarchean basement on a certain scale in Lushan. Compared with the Precambrian evolution of Jiaodong and Huoqiu, it is concluded that a Mesoarchean block, which underwent a significant crustal growth event at 2.9-3.0 Ga, may be present along the southern margin of the North China Craton. |
| |
| Keywords: | Lushan zircon dating Mesoarchean southern margin of the North China Craton ancient block |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《中国地质》浏览原始摘要信息 |
| 点击此处可从《中国地质》下载免费的PDF全文 |
|
