辽西于寺盆地膨润土矿地质特征及控矿因素分析  

Geological Characteristics and Controlling Factors of Bentonite Deposits in Yusi Basin of Western Liaoning

作　　者：朱兴葛 ZHU Xing-ge(Liaoning Branch of China National Geological Exploration Center of Building Materials Industry,Shenyang 110004,China)

机构地区：[1]中国建筑材料工业地质勘查中心辽宁总队,辽宁沈阳110004

出　　处：《中国非金属矿工业导刊》2024年第4期13-17,12,共6页China Non-Metallic Minerals industry

基　　金：中国建筑材料工业地质勘查中心地质找矿项目(编号:建地矿[2022]13号)。

摘　　要：于寺盆地为一中生代小型火山岩构造盆地,轴向北西西—南东东。盆地内膨润土资源量较为丰富,矿床、矿点众多,主要分布在盆地的南北两翼。总体上,蒙脱石含量呈现“北翼高南翼低”、矿石属性“浅部钙基深部钠基”的特点。矿床类型为火山碎屑岩—熔岩蚀变改造型膨润土矿床。构造样式、地层岩性、水化学条件、蚀变作用是膨润土矿床的主要控矿因素。The Yusi Basin is a small volcanic rock tectonic basin of the Mesozoic era,its axis is NWW-SEE.The bentonite resources in the basin are relatively abundant,there are many kinds of bentonite deposits and districts,mainly distributed on the borth north and south flanks of the basin.On a whole,there are some evident characteristics for the content of montmorillonite is"high in the north flank and low in the south flank",and the mineral properties is"shallow calcium based and deep sodium based".The type of deposit is a Alteration and transformation bentonite deposit that the volcanic clastic rock-volcanic lava is altered.Structural style,stratigraphic lithology,hydrochemical conditions,and alteration are the main controlling factors of bentonite deposits.

关 键 词：辽西 于寺盆地 膨润土 地质特征 控矿因素 

分 类 号：P619.255[天文地球—矿床学]