潍坊市朱里膨润土矿地质特征及成因分析  

Geological Characteristics and Genesis of Bentonite Deposit in Zhuli,Weifang

作　　者：牟路路 MU Lulu(Shandong Headquarters of China Building Material Industry Geological Exploration Center,Jinan 250100,China)

机构地区：[1]中国建筑材料工业地质勘查中心山东总队,济南250100

出　　处：《中国资源综合利用》2024年第6期116-118,128,共4页China Resources Comprehensive Utilization

摘　　要：潍坊市朱里膨润土矿为陆相火山岩沉积水解蚀变型膨润土矿床,对其矿地质背景、矿体特征、矿床成因等内容进行分析。白垩纪青山群石前庄组是该类型膨润土矿床的赋存层位,研究区内断陷盆地为其成矿提供了空间场所;其原岩为一套中酸性火山集块岩、流纹岩、中酸性凝灰角砾岩、安山质凝灰岩建造;在流水通畅的氧化环境下,偏碱性的层间水、裂隙孔隙水共同作用与原岩发生水解与蚀变,形成膨润土矿床。距火山通道不远的火山碎屑岩或分布于火山通道不远的火山熔岩形成的断陷盆地(坊子凹陷)为膨润土成矿提供了空间场所。矿体多呈层状、似层状,倾角一般小于20°,矿化较为均匀,该类型矿床一般规模较大。Weifang Zhuli bentonite mine is a terrestrial volcanic sedimentary hydrolytic alteration bentonite deposit,its mineral geological background,ore body characteristics,deposit genesis and other contents are analyzed.Cretaceous Castle Peak Group Shiqianzhuang group is this type of bentonite deposits of endowment layer,the study area fault basin for its mineralization provides a spatial place;the original rock for a set of moderate acid volcanic agglomerate,rhyolite,moderate acid tuff breccia,andesite tuff construction;in the fluid oxidative environment,the alkaline interlayer water,fissure pore water and the common role of the original rock hydrolysis and alteration,the formation of bentonite deposits.The pyroclastic rocks not far from the volcanic passage or the volcanic lava basins formed not far from the volcanic passage(Fangzi depression)provide space for bentonite mineralization.The ore body is mostly layered,seemingly layered,dip angle is generally less than 20°,mineralization is more uniform,the type of deposit is generally larger.

关 键 词：膨润土 矿床 潍坊市 

分 类 号：P619.25[天文地球—矿床学]