摘要
郁山铝土矿矿床是豫西典型的隐伏铝土矿床,本文以西郁山矿段为主较系统阐述了矿床地质、矿体和矿石特征等。矿体赋存于本溪组铁铝质泥岩建造中下覆马家沟组岩溶特征控制矿体的形态,矿体深部延伸受架子沟背斜及断层控制,其上覆地层控制矿体的埋深。矿体厚度空间变化大,A/S与含铝岩系厚度及矿体厚度相关性很小。矿石以鲕粒和泥晶结构为主,少部分具有"砾中鲕"结构,显示矿床形成过程中的风化与搬运的复合过程。矿石主要含铝矿物是一水硬铝石(42%～88%),其次是粘土矿物(高岭石和伊利石);黄铁矿、菱铁矿较普遍分布于下部矿石中,显示矿石形成于还原性沉积洼地中。铝土矿共伴生有益矿产和元素价值大。本文对进一步研究河南省隐伏铝土矿床有较重要参考意义。
The Yushan bauxite deposit is a typical concealed bauxite deposit in western Henan Province. Taking the western Yushan mine section as an example, this paper studied its characteristics of the deposit geology, orebody and ores systematically. The bauxite orebody occurs in the aluminiferous rock system of the Carboniferous Benxi Formation. The morphology of the orebody is controlled by karst terrain upon the underlying Majiagou Formation. The Jiazigou anticline and faults control the deep extension of the orebody, and the overlying strata decide the burial depth of the orebody. The orebody thickness varies greatly. The relationship between A/S and the thickness of the aluminiferous rock system is weak, as is the same with the relationship be- tween A/S and the orebody thickness. The ores mainly display oolitic and argillaceous textures, and a few with ooid-in-pistol texture. This may suggest a recombination between weathering and transportation occurring during the ore formation. The dominant Al-bearing minerals include diaspore （42% - 88 % ） and clay minerals （kaolinite and illinite）. Pyrite and siderite are widely distributed in the lower part of the orebody, revealing that the ores were formed in a reducing karst depression. The paragenetic and associated minerals and elements within the bauxite have a great commercial value. This paper has an important reference value for the further study of concealed bauxite deposits in Henan Province.
出处
《地质与勘探》
CAS
CSCD
北大核心
2012年第3期479-486,共8页
Geology and Exploration
基金
河南省2007年度地质勘查基金(周转金)项目"河南省新安县郁山铝土矿详查"(项目编号:豫国土资发(2008)87号)
河南省覆盖区铝(粘)土矿资源潜力评价和找矿技术研究项目(项目编号:资[2010]矿评01-12-13号)项目联合资助
关键词
铝土矿床
隐伏矿
地质特征
河南省
郁山
bauxite deposit, concealed orebody, geological characteristics, Henan Province, Yushan
