• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>American journal of applied sciences >Mineralogy and Chemistry of Coronadite from Middle Cambrian Manganese Deposits at Wadi Dana, Southern Jordan | Science Publications
【24h】

Mineralogy and Chemistry of Coronadite from Middle Cambrian Manganese Deposits at Wadi Dana, Southern Jordan | Science Publications

机译：约旦南部瓦迪达纳中寒武纪锰矿床中电晕辉石的矿物学和化学|科学出版物

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

> Coronadite was reported from the upper-most horizons of the Middle Cambrian sediments at two locations in Wadi Dana, central Wadi Araba and Jordan. The unit is composed of dolomite, limestone and shale. Geochemical investigations show appreciable variations in Mn, Pb, Fe, K and Ba contents in the coronadite between the two studied sites. Pb was found to increase downward in both sites in spite of the lateral distance between them. Fe does not vary vertically, but its concentration decreases eastward. This can be attributed to the nature and mobilization direction, duration of the process, as well as the mechanism of both Fe and Pb bearing solutions. Mineralogical analysis has revealed the presence of hollandite-coronadite, cryptomelane-coronadite and psilomelane-coronadite in solid solutions. These petrographical and geochemical characteristics of the coronadite-bearing samples indicated that they formed epigenetically.
机译： >据报道，在瓦迪达纳（Wadi Araba）和约旦中部的两个地点，中寒武纪沉积物的最上层地平线上有日冕。该单元由白云石，石灰石和页岩组成。地球化学研究表明，在两个研究地点之间，电晕石中的锰，铅，铁，钾和钡的含量存在明显的变化。尽管两个位置之间有横向距离，但发现Pb向下增加。铁在垂直方向上没有变化，但是其浓度向东降低。这可以归因于性质和动员方向，过程的持续时间以及含铁和含铅溶液的机理。矿物学分析表明，固溶体中存在堇青石-堇青石，隐锰烷-堇青石和倍氟烷-堇青石。含Coronadite样品的这些岩石学和地球化学特征表明它们是表观遗传形成的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号