| 姚国龙,覃志安,朱恺军,最桂巧.新疆莫托萨拉铁锰矿硅质岩特征及其成因探讨[J].地质找矿论丛,2000,(4):307-313 |
| 新疆莫托萨拉铁锰矿硅质岩特征及其成因探讨 |
| FEATURE AND GENESIS OF CHERT LAYER IN MOTUOSARLA Fe AND Mn DEPOSIT,XINJIANG |
| 投稿时间：2000-06-21 修订日期：2000-10-31 |
| DOI：10.6053/j.issn.1001-1412.2000.4. 003 |
| 中文关键词: 硅质岩 热水沉积作用 铁锰矿床 莫托萨拉 新疆 |
| 英文关键词:Chert layer hot water-sedimentation Fe,Mn deposit Motuosarla Xinjiangp |
| 基金项目:国家科技攻关项目(96-915-03-05B)资助 |
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| 中文摘要: |
| 莫托萨拉铁锰矿硅质岩呈层状产于铁矿中,含热水沉积矿物。岩石的Fe2O3,Au,Ag,Cu,Pb,Zn,As,Sb,Hg质量分数高,Cr,Ni,Co,FeO,Al2O3质量分数低,w(Al)/w(Al+Mn+Fe)比值低,这些元素组合指示出其热水沉积成因。在判别硅质岩形成作用的主元素和微量元素关系图上,硅质岩主要位于热水沉积作用的范围内或接近于热水沉积作用。岩石的稀土元素和O,Si同位素组成表明硅质岩是由热水沉积作用形成的。 |
| 英文摘要: |
| Chert layer occurs in Motuosarla iron deposit and contain some hot waterdeposited minerals.Analysis of the chert show high concentmtion of Fe2O3,Au,Ag,Cu,Pb,Zh,Sb and Hg and low concentration of Cr,Ni,Co,FeO,Al2O3 and Al/(Al+Mn+Fe) is low.In the genetic discrimination plot major and trace elements of the chert all fall into or near the field of hot water sedimentary rocks.REE and O,Si isotope analysis are characterized by hot water sedimentation.All the data indicate that the chert layer is formed by hot water sedimentation. |
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