| 广西钦州板城晚泥盆世硅质岩地球化学特征及沉积环境探讨 |
| |
| 引用本文： | 邓希光,李献华,陈志刚.广西钦州板城晚泥盆世硅质岩地球化学特征及沉积环境探讨[J].地质科学,2003,38(4):460-469. |
| |
| 作者姓名： | 邓希光 李献华 陈志刚 |
| |
| 作者单位： | 中国科学院广州地球化学研究所 广州 510640 |
| |
| 基金项目： | 中国科学院知识创新工程项目“华南中生代盆山系统及动力学研究”(KZCX2 1 0 2 )资助 |
| |
| 摘 要： | 广西钦州小董——板城地区发育较好的晚泥盆世至晚二叠世含放射虫硅质岩,剖面连续。本文对板城地区石梯水库晚泥盆世含放射虫硅质岩进行了主量元素、微量元素和稀土元素的分析,指示这些硅质岩形成于大陆边缘与深海盆地之间的过渡地带,说明在晚泥盆世钦州地区不存在大洋,与当时在华南板块与扬子板块之间发育古特提斯洋不符。
|
| 关 键 词： | 沉积环境 地球化学 晚泥盆世硅质岩 广西钦州 |
| 文章编号： | 0563-5020(2003)04-0460-10 |
| 收稿时间： | 2001-12-10 |
| 修稿时间： | 2001年12月10 |
GEOCHEMICAL FEATURES AND SEDIMENTARY SETTING OF LATE DEVONIAN CHERTS IN BANCHENG OF QINZHOU, GUANGXI |
| |
| Deng Xiguang,Li Xianhua,Chen Zhigang.GEOCHEMICAL FEATURES AND SEDIMENTARY SETTING OF LATE DEVONIAN CHERTS IN BANCHENG OF QINZHOU, GUANGXI[J].Chinese Journal of Geology,2003,38(4):460-469. |
| |
| Authors: | Deng Xiguang Li Xianhua Chen Zhigang |
| |
| Institution: | Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640 |
| |
| Abstract: | There was a continuous profile of cherts in age of Late Devonian to Late Permian outcroping in Xiaodong Bancheng of Qinzhou, Guangxi. The contents of major, trace and rare earth elements of the Late Devonian cherts from the Shiti Reservoir of Bancheng were analyzed, which showed the tectonic setting of continent, with SiO 2 being over 88%, Si/(Si+Al+Fe) > 0.92, Al/(Al+Fe+Mn) being near 0.619, and the REE pattern having no or very small Ce negative anomaly. Meanwhile, the discrimination diagrams of Fe 2O 3/TiO 2 vs. Al 2O 3/(Al 2O 3+Fe 2O 3), (La/Ce) Shale vs. Al 2O 3/(Al 2O 3+Fe 2O 3), Ti vs. V and V/Y vs. Ti/V also suggested the cherts being formed in an environment from continental margin transitional to deep marine basin. These evidences indicated that the cherts, belonging to biogenesis, deposited in the transitional belt between continental margin and deep marine basin, which meant that there was not an ocean, namely, the Palaeo Tethyan Ocean, occurring between the Huanan and Yangtze Blocks in Qinzhou area during Late Devonian. |
| |
| Keywords: | Sedimentary setting Geochemistry Late Devonian cherts Qinzhou of Guangxi |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地质科学》浏览原始摘要信息 |
| 点击此处可从《地质科学》下载免费的PDF全文 |
|
