牡丹江穆棱沸石矿床矿化分带特征与规律  

Mineralization Zonation of Muling Zeolite Deposit in Mudanjiang

作　　者：张寿庭[1] 赵鹏大[1] 徐旃章[2] 杨耕东[2] 

机构地区：[1]中国地质大学,北京100083 [2]成都理工大学,四川成都610059

出　　处：《矿床地质》2004年第1期31-38,共8页Mineral Deposits

基　　金：中国科学院地质与地球物理研究所矿产资源研究重点实验室开放基金;教育部博士点基金(20010491007);国土资源部非传统矿产资源开放研究实验室基金(200104)资助

摘　　要：文章以穆棱沸石矿床为例 ,探讨了天然沸石矿矿化分带特征与矿石物化性能的空间变化规律。研究表明 :矿床不同部位沸石矿化类型的差异变化与碱金属K、Na元素的分异富集特征关系密切 ;若两者分异富集明显 ,易形成单一的斜发沸石或丝光沸石矿 ;反之 ,则形成混合型沸石矿。由矿体浅部往深部 ,矿石物化性能的差异变化总体表现为 :NH+ 4和K+ 的交换容量、最大热失重值、吸湿率及气体吸附容量等渐趋增大 ;With a case study of the Muling zeolite ore deposit as an example, this paper ha s discussed the zeolitization zoning characteristics and the spatial variation o f physical_chemical capabilities of natural zeolite ores. Studies show that, alo ng with the intensification of mineralization and the enrichment of ore grades, H 2O and CaO+MgO contents and (CaO+MgO)/(K 2O+Na 2O) ratios tend to increase whereas K 2O+Na 2O amounts seem to decrease. There are close relations between zeolitization types and differentiations of alkali metals K and Na. The higher K_Na differentiation is responsible for the formation of simple zeolite (mordeni te or clinoptilolite) deposits, while the lower K_Na differentiation is responsi ble for the formation of mixed zeolite (mordenite and clinoptilolite) deposits. The clinoptilolite orebodies are relatively enriched in K and depleted in Na, wh ereas the mordenite orebodies are relatively enriched in Na and depleted in K. T he variation of physical_chemical capabilities of natural zeolite ores in differ ent parts of an orebody shows the following regularity: the CEC of NH + 4 and K +, the values of heated water losses, the hydroscopicity and the gas_absorbe d capacities tend to increase, while the resistances to heat and acid for zeolit e ores tend to decrease in downward succession of an orebody.

关 键 词：穆棱沸石矿床 地质学 矿化分带 化学组分 物化性能 

分 类 号：P619.217[天文地球—矿床学]