| 湖北建始北部二叠纪地层硒的来源与富集 |
| |
| 引用本文： | 牛志军,徐安武,段其发,傅泰安.湖北建始北部二叠纪地层硒的来源与富集[J].地质通报,2000,19(4):396-401. |
| |
| 作者姓名： | 牛志军 徐安武 段其发 傅泰安 |
| |
| 作者单位： | 中国地质调查局宜昌地质矿产研究所,湖北,宜昌,443003 |
| |
| 摘 要： | 在建始北部 1∶5万地质填图中 ,调查了该区二叠纪的 3个硒异常层位———孤峰组、吴家坪组和大隆组。在硒异常层或其下伏层位中发现有基性火山碎屑沉积 ,硒的含量与基性火山碎屑在地层序列与平面展布上呈正比。从地质时代的一致性上反映硒的来源与西南地区峨眉山玄武岩喷发或风化作用有关。硒含量变化与海平面升降曲线表现出正相关 ,在最大海泛面处达最大值。大的容纳空间和水体能量较低的环境 ,利于有机碳质大量吸附硒 ,造成硒的富集。
|
| 关 键 词： | 硒异常层 峨眉山玄武岩 湖北建始 |
| 修稿时间： | 1999-09-27 |
Origin and enrichment of Selenium in Permian strata in the northern part of Jianshi, Hubei |
| |
| NIU Zhi-jun,XU An-wu,DUAN Qi-fa,FU Tai-an.Origin and enrichment of Selenium in Permian strata in the northern part of Jianshi, Hubei[J].Geologcal Bulletin OF China,2000,19(4):396-401. |
| |
| Authors: | NIU Zhi-jun XU An-wu DUAN Qi-fa FU Tai-an |
| |
| Abstract: | During
1∶50 000 geological mapping in the northern part of Jianshi, Hubei, the authors
investigated three Permian selenium anomaly horizons—the Gufeng, Wujiaping and Dalong
Formations—in the area. Basic pyroclastic rocks were found in the selenium anomaly
horizons or their underlying horizons. The selenium content is positively proportional to
basic pyroclastic rocks in the stratigraphic sequence and in plan distribution. The
consistency of the geologic ages suggests that the selenium source is related to eruption
or weathering of the Emeishan basalt in Southwest China. The selenium content variation
displays a positive correlation with the sea-level fluctuation curve, with the selenium
content reaching a maximum at the highest marine-flooding surface. The large hosting space
and the environment with relative flow water body energy as well as the use of organic
carbon to absorb a significant amount of selenium result in enrichment of selenium. |
| |
| Keywords: | selenium anomaly horizon Emeishan basalt Jianshi Hubei |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《地质通报》浏览原始摘要信息 |
| 点击此处可从《地质通报》下载免费的PDF全文 |
|
