江西省新干县丹元高岭土矿矿床特征及找矿前景

分析了矿区地质特征、分析风化壳与高岭土矿的关系，矿体地质特征，并结合丹元高岭土矿详查成果对上院岩体寻找高岭土矿山前景进行了分析。研究表明：矿区地处亚热带季风区，有机酸作用强烈，地下水的水质类型以中—低矿化度的重碳酸盐型为主，易促使铝硅酸岩造岩矿物水解蚀变向生产高岭石类方向发展，易形成风化残积型高岭土矿产；矿区地形一般从山顶浑圆、山坡平缓、沟谷开阔，高岭土矿体多在丘岗之上或坡度较缓的山坡处；矿体以燕山期中粒白云二长花岗岩风化壳是矿区风化最为细腻、自然白度最高的成矿原岩，次为中粗粒似斑状二长花岗岩；矿区为一大型规模强绢云母化花岗岩风化壳残积型高岭土矿床；燕山期上院岩体花岗岩基在区域内出露范围较大，对原地全风化残积型高岭土矿床具有更大的找矿前景。

Deposit Characteristics and Prospecting Potential of Danyuan Kaolin Ore in Xingan County,Jiangxi Province#br#

This paper briefly introduces the geologic characteristics of mining area,analyzes the relationship between weathered crust and kaolin ore,elaborates the geologic characteristics of ore body,and discusses the prospect of seeking kaolin ore from upper rock mass in accordance with the detailed investigation results of Danyuan kaolin ore.As is shown in the researches,firstly the mining area is located in the zone of subtropical monsoon climate where organic acid effects are strong and the water quality type of underground water is mainly medium and low salinity bicarbonate which is easy to turn rock forming mineral hydrolysis and alteration of aluminum silicate rock into the production of kaolin ore,and to form the kaolin ore of weathered residual type.Secondly,the landform of mining area is generally rounded top,gentle slope and wide ravine.Kaolin ore body mainly lies in the hilly area and hillside with gentle slope.Thirdly,Yanshanian medium grained muscovite monzonitic granite weathered crust is taken as the finest ore forming protolit with the highest natural whiteness.Medium and coarse grained porphyroid monzonitic granite ranks second.Fourthly,mining area is a large scale weathered residual type kaolin ore deposit with intensive sericitization granite weathered crust.Finally,the exposed range of granite base in Yanshanian upper rock mass is relatively wide,which provides better prospecting potential for completely weathered residual type kaolin ore deposit.