基于XEPOS型X射线荧光光谱仪研究江西朱溪铜钨矿床成矿元素地球化学特征与成因  

Metallogenic Element Geochemistry Characteristics and Genesis of the Zhuxi Copper-Tungsten Polymetallic Deposit,Jiangxi Province Base Using XEPOS X-ray Fluorescence Spectrometry

作　　者：苏晓云[1] 王登红[2] 王成辉[2] 刘善宝[2] 刘建光[3] 樊兴涛[4] 蒯丽君[4] 陈国华[3] 万浩章[3] 张诚[3] 黄桂强[5] 

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]中国地质科学院矿产资源研究所,北京100037 [3]江西省地质矿产勘查开发局九一二大队,江西鹰潭335001 [4]国家地质实验测试中心,北京100037 [5]中国冶金地质总局中南局南宁地质勘查院,广西南宁530022

出　　处：《岩矿测试》2013年第6期959-969,共11页Rock and Mineral Analysis

基　　金：江西省地质勘查基金项目"江西省塔前-赋春铜多金属成矿带成矿规律与成矿预测"(20120106);中国地质大调查项目"我国重要矿产和区域成矿规律研究"(1212010633903);中国地质大调查项目"中国矿产地质与区域成矿规律总结"(1212011220369)

摘　　要：江西朱溪铜钨矿是近年新发现的一个以钨铜为主的多金属大型至超大型矿床,成矿潜力巨大,但目前仅对矿床地质特征等有所研究,研究程度较低,因此急需对矿床成因类型、地球化学特征等进行深入研究。本文对铜钨矿体钻孔岩芯样品进行直接粉末制样,应用XEPOS型偏振激发能量色散X射线荧光光谱仪分析主量元素(SiO2、CaO、MgO),微量元素(Cu、W、Zn、Ag)的含量,研究朱溪矿区成矿元素的地球化学特征。结果表明,主量元素SiO2、CaO、MgO交代作用显著,SiO2和CaO呈"对顶"之势;微量元素Cu、W、Zn、Ag等含量随深度增加呈波状起伏是受构造控制的岩层交代的明显特征,且Cu、W在空间上有中间高、两边低的分布特征。这些元素的变化趋势均表明该矿体属于交代成因,而元素的变化反映到矿物组合也说明成矿物质来源与花岗岩、花岗斑岩、花岗岩闪长岩等有关。本文的研究成果可为进一步勘探工作与成矿预测提供理论依据。The Zhuxi deposit is a new discovery of copper-tungsten dominated large-super-large ore deposit with great mineralization potential situated in the Zhuxi Area,Jingdezhen City,Jiangxi Province.However,present research is somewhat limited for some of the geological characteristics.Further study on genetic types and geochemical characteristics for this deposit is necessary.A bench-top type Polarized Energy Dispersive X-Ray Fluorescence Spectrometer,coupled with directly pressed powder samples has been used to analyze drill core samples of the Cu-W ore body.The instrument used in the experiments has a high detection ability for measuring major elements （SiO2,CaO and MgO） and trace elements （Cu,W,Zn and Ag）,compositions with low detection limit,small error,good stability and other characteristics.The experimental results show that the major elements of SiO2,CaO and MgO have strong metasomatism characteristics.The SiO2 and CaO have a negative correlation.Trace elements Cu,W,Zn and Ag also exhibit symbiotic features,and Cu,W contents are high in the middle and low on both sides spatially.All evidence explains the metasomatism characteristics controlled by structures.The element variations and related mineral compositions also indicate that ore-forming materials were derived from granodiorite,porphyry,granite porphyry and diorite.These results provide a theoretical basis for mineralization forecast and further exploration goals.

关 键 词：江西朱溪铜钨矿 成矿元素 交代作用 地球化学特征 

分 类 号：P612[天文地球—矿床学]