| 付治国,王军强,张沛垚.河南嵩箕地区铝土矿的次生富集规律[J].地质找矿论丛,2009,24(1):28-33 |
| 河南嵩箕地区铝土矿的次生富集规律 |
| SECONDARY ENRICHMENT PATTERN OF BAUXITE ORE IN SONGQI AREA,HENAN PROVINCE |
| 投稿时间：2008-01-07 修订日期：2008-03-06 |
| DOI：10.6053/j.issn.1001-1412.2009.1. 005 |
| 中文关键词: 嵩箕地区 铝土矿 次生富集 河南省 |
| 英文关键词:Songqi area bauxite secondary enrichment Henan province |
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| 中文摘要: |
| 河南省嵩箕地区铝土矿具有明显的次生富集规律:次生富集最强的部位在潜水面附近,通常为矿体埋深40~70m的部位;深度大于130m的含矿地段氧化程度变低、矿石质量下降;矿石氧化富集的内因为Al2O3和SiO2的地球化学差异,外因是矿体内地下水的补给量及其排泄能力的强弱,铝土矿在次生氧化作用中不断地脱硅富铝,形成富铝土矿石;适宜的构造和地貌条件是地下水补给、排泄的有利保证,上石炭统底部靠近铝土矿层的岩溶溶洞是向矿层内补充大气降水的主要通道。 |
| 英文摘要: |
| Bauxite ore in Songqi area,Henan province is characterized by secondary enrichment.The strongest enrichment occurs about the groundwater level,generally at the buried depth 40-70m of the ore body.To the buried depth more than 130m oxidation is weakened and ore quality is poor.Internal cause of the secondary enrichment is the geochemical variation of Al2O3 and SiO2 and external cause the capacity of supply and drainage of groundwater in and out of the ore body.The primary bauxite ore is reduced its silica and added with alumina thus the rich ore is formed during the secondary oxidation.The proper structural and topographic condition is the prerequisite for underground water supply and drainage.Karst developed at bottom of Upper Carboniferous series and on top of the bauxite ore layer is the main passage of meteoric water supplied to the ore layer. |
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