胶东金矿床蚀变岩岩石地球化学特征与水岩反应机理分析  

Lithogeochemistry of the alterated rocks and water-rock interaction mechanism in the gold deposits,Jiaodong Peninsula

作　　者：朱兴明 周鑫[2,3] 杨斌[2,3] 邹艳红[2,3] 王杜涛[4] 向胤合[2,3] Zhu Xingming;Zhou Xin;Yang Bin;Zou Yanhong;Wang Dutao;Xiang Yinhe(Tongguan Mine Construction Co.,Ltd.,Tongling Nonferrous Metals Group;School of Geosciences and Info-physics,Central South University;Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring;Zhaojin Group Co.,Ltd.)

机构地区：[1]铜陵有色金属集团铜冠矿山建设股份有限公司,244000 [2]中南大学地球科学与信息物理学院 [3]有色金属成矿预测与地质环境监测教育部重点实验室 [4]招金矿业股份有限公司

出　　处：《黄金》2021年第9期12-17,共6页Gold

基　　金：国家自然科学基金项目(41472301);国家重点研发计划课题(2017YFC0601503)。

摘　　要：以胶东大尹格庄、夏甸、七里山、上庄、腊子沟金矿床为研究对象,探讨胶东金矿床蚀变岩形成过程中主量元素演化规律与水岩反应机理。研究结果显示:原岩在红化蚀变过程中,SO_(3)普遍为带入组分,Al_(2)O_(3)、TiO_(2)、SrO、BaO普遍为带出组分,K_(2)O、Na_(2)O、CaO、MgO、TFe_(2)O_(3)、SiO_(2)等在不同矿区表现为带入组分或带出组分。原岩在黄铁绢英岩化和绢英岩化蚀变过程中,K_(2)O、SO_(3)普遍为带入组分,Na_(2)O、Al_(2)O_(3)、SrO、BaO普遍为带出组分,CaO、MgO、SiO_(2)、TFe_(2)O_(3)等在不同矿区表现为带入组分或带出组分。胶东金矿床红化蚀变是一种钾长石化、钠长石化、赤铁矿化、金红石化、绿泥石化、碳酸盐化组合蚀变,总体上形成于高氧逸度和偏碱性物理化学条件。金矿体和黄铁绢英岩则形成于还原性和偏酸性物理化学条件。在大地电场环境下,胶东金矿床水岩反应体系为一个与自然电解-电离作用有关的电化学反应体系。The regularity on the evolution of principal elements and the water-rock interaction mechanism in the process of alterated rocks formation were discussed according to the studies on Dayingezhuang, Xiadian, Qilishan, Shangzhuang and Lazigou gold deposits, Jiaodong Peninsula.The results show that in the reddenization alteration process of protolith, SO_(3) was generally carried in;Al_(2)O_(3),TiO_(2),SrO,BaO were generally brought out;K_(2)O,Na_(2)O,CaO,MgO,TFe_(2)O_(3),SiO_(2) were carried in or brought out, depending on different districts;in the process of beresitization or sericitization of protolith, K_(2)O and SO_(3) were generally carried in, and Na_(2)O,Al_(2)O_(3),SrO,BaO were generally brought out;CaO,MgO,SiO_(2),TFe_(2)O_(3) were carried in or brought out, depending on different districts.In gold deposits in Jiaodong Peninsula, the reddenization alteration was a kind of associative alteration consisting of potassium feldspar alteration, albite alteration, hematite alteration, rutile alteration, chlorite alteration, calcite alteration, and generally was formed in the physical and chemical conditions of high oxygen fugacity and weak alkalinity.The gold orebodies and beresite formed in the physical and chemical conditions of reducibility and weak acidity.In the background of telluric electricity field, the water-rock interaction system of gold deposits in Jiaodong Peninsula is an electrochemical reaction system related to the natural electrolysis-ionization reaction.

关 键 词：蚀变岩 岩石地球化学 红化蚀变 黄铁绢英岩化 水岩反应 胶东金矿床 

分 类 号：TD11[矿业工程—矿山地质测量]