内蒙古扎木敖包矿床土壤气体纳米微粒特征研究  

Study on the Characteristics of Soil Gas Nanoparticles in Zhamuaobao Deposit,Inner Mongolia

作　　者：彭忠泽 曹建劲 何雨璇[1,2,3,4] 刘翔 胡乖 陆美曲 PENG Zhongze;CAO Jianjin;HE Yuxuan;LIU Xiang;HU Guai;LU Meiqu(School of Earth Sciences and Engineering,Sun Yat-sen University,Guangzhou 510275,China;Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China;Guangdong Provincial Key Laboratory of Geodynamics and Geohazards,Guangzhou 510275,China;Southern Laboratory of Ocean Science and Engineering(Zhuhai),Zhuhai 519000,China)

机构地区：[1]中山大学地球科学与工程学院,广东广州510275 [2]广东省地质过程与矿产资源探查重点实验室,广东广州510275 [3]广东省地球动力作用与地质灾害重点实验室,广东广州510275 [4]南方海洋科学与工程广东省实验室(珠海),广东珠海519000

出　　处：《金属矿山》2021年第2期146-154,共9页Metal Mine

基　　金：国家自然科学基金项目(编号:41873044,41473040,41030425)。

摘　　要：以内蒙古戈壁地区扎木敖包矿床为研究对象,采用透射电镜研究该矿床土壤气体纳米微粒的形貌、化学成分、大小、结构、聚合等特征,旨在克服该地区厚砂砾层的屏蔽作用探查深部隐伏矿体。结果表明:微粒兼具有聚合体和单一颗粒形态,多以聚合体形态出现,粒度为30~550 nm,形态各异,多数为多晶。微粒的主要金属成分为Fe、Pb、Zn、Cu、Sn、Mo等,多见Fe-Zn、Pb-Fe-Zn的组合方式,这些特征与矿体金属矿物元素种类和组合特征对应性良好。含Fe微粒对金属元素具有良好的吸附能力,Zn元素多见被吸附而携带迁移。对比背景区微粒成分同地层成分相似的情况,矿区微粒的成矿元素异常指示其与深部矿体具有密切联系。微粒的成分包括氧化物、氢氧化物、硫酸盐等,含氧量普遍偏高,金属元素及S元素多以高价态形式存在,结合地貌和断层发育特点,推测扎木敖包纳米微粒的成因为氧化作用或断层加后期氧化作用。In order to overcome the shielding effect of the thick gravel cover in the Gobi area to explore the deep concealed orebody,soil gas nanoparticles have been sampled from Zhamuaobao Deposit in Inner Mongolia.And the morphology,chemical composition,size,structure,polymerization and so on of these nanoparticles analyzed by transmission electron microscope.The results revealed that these nanoparticles are from 30 to 550 nm in size and in different morphologies,overwhelming majority with polycrystalline structure,are often in the form of aggregates and individual particles,of which the former ones were most common.The main metal components of these particles are Fe,Pb,Zn,Cu,Sn,Mo and so on.The combination of Fe-Zn and Pb-Fe-Zn is common.These characteristics have good correspondence with the types and combination characteristics of metal mineral elements in the orebody.Fe-containing particles have good adsorption capacity for metal elements,and Zn elements are mostly adsorbed and transported.Contrasting the situation that the composition of nanoparticles in the background area is similar to that in the strata,the anomalies of the ore-forming elements of the nanoparticles in the mining area indicate that they are closely related to the deep orebody.The composition of the nanoparticles includes oxides,hydroxides,sulfates,etc.the oxygen content is generally high.The metal elements and S elements are mostly present in the form of high prices.Considering the characteristics of geomorphology and fault development,it is speculated that the cause of formation of Zhamuaobao nanoparticles is oxidation or faulting plus late-stage oxidation.

关 键 词：戈壁覆盖区 土壤气体 透射电镜 纳米微粒 

分 类 号：P612[天文地球—矿床学]