豫西偃师南部铝土矿地质特征及控矿地质条件  

THE GEOLOGICAL CHARACTERISTICS AND ORE CONTROLLING GEOLOGICAL CONDITIONS OF BAUXITE DEPOSITS IN SOUTHERN YANSHI,WESTERN HENAN

作　　者：陈丽娟[1] 张建东[2] 

机构地区：[1]河南省有色金属地质勘查总院 [2]中南大学地学与环境工程学院,长沙410083

出　　处：《地质找矿论丛》2008年第2期144-148,共5页Contributions to Geology and Mineral Resources Research

摘　　要：偃师南部铝土矿床产于中奥陶统侵蚀面之上的石炭系本溪组中,分布于早古生代沁阳—开封坳陷与嵩山隆起过渡地带,构造环境相对稳定,沉积间断时间长,沉积相为滨海-泻湖相,风化及淋滤作用对铝土成矿物质来源及后期铝土矿品位提高起着重要作用。Bauxite deposits in southern Yanshi occurs in Benxi group of Carboniferous system on the long term weathering erosion surface of Middle Ordovician and distributed on the transition belt of Songshan upwelling and Qinyang-Kaifeng subsiding of Earlier Paleozoic Era ,The tectonic environment is relatively stable and sedimentary interruption period is long. The sedimentary facies is littoral-lagoon facies. Weathering and leaching plays critical role and improving grade of ore in late period.

关 键 词：铝土矿 本溪组 构造环境 沉积相 风化作用 河南省 

分 类 号：P613[天文地球—矿床学] P618.45[天文地球—地质学]