山东国土资源2016，Vol.32Issue(3)：1-9,9.
山东旧店金矿成因矿物学研究及其意义
Mineralogy Study and Its Significance of the Origin of Jiudian Gold Deposit in Shandong Province
摘要
Abstract
Jiudian gold deposit is located in the North China plate in Jiaobei uplift.Its ore-bearing country rocks are late Jurassic Linglong granite.The origin of this deposit is post magmatic hydrothermal fissure filling quartz vein type gold deposit.According to metallogenic materials,precipitation sequences can be di-vided into five mineralization stages,such as pyritization- sericite quartz alteration (Ⅰ stage),quartz-magnetic pyrite and medium-coarse grained pyrite (Ⅱstage),quartz-pyrite and fine grained pyrite (Ⅲstage),quartz and multi-metal sulfide (Ⅳ stage)and quartz-carbonate rocks (Ⅴ stage).Among them,Ⅱstage,Ⅲ stage and Ⅳ stage are major gold enrichment and mineralization stages.On the basis of stud-ying standard type characteristics of pyrite and quartz in Jiudian gold deposit in Shandong province,accord-ing to the mineralization stages,five generations of pyrite have been divided,they are pyrite of Ⅰ stage formed in beresite,pyrite of Ⅱstage formed in pyrite quartz vein,pyrite of Ⅲ stage formed in quartz py-rite,pyrite of Ⅳ stage formed in polymetallic sulfide ores and pyrite of Ⅴ stage formed inquartz carbonate veins.Major pyrite crystal forms are single crystal as {100},{210},{1 1 1}and combination forms as {100}+{210},{100}+ {1 1 1 }and {100}+ {210 }+ {1 1 1 }.Accompanying with changes in the mineralization stage,cube occurrence rate gradually decreases,while occurrence rate of combination forms in pentagonal dodecahedron,cube + pentagonal dodecahedron gradually increased.In late stage of mineralization,cubic pyrite with high occurrence rate occurred.Crystal forms of pyrite in the pyrite quartz mineralization stage (Ⅲ stage)in Jiudian gold deposit are mainly composed of {100}+{210},while in pyrite polymetallic sul-fide mineralization stage (stage IV),crystal forms are minly composed of combination forms as {100}+{1 1 1}{100}+{210}+{1 1 1}.In the early and late stage,pyrite crystals are very simple.They are mainly composed of single crystal form as {100},{210},{1 1 1}.Through study on main components of pyrite,it is showed that pyrite mineralization stage perform the charactetistics of loss in S and rich in Fe.In the main metallogenic stage(Ⅲ,Ⅳ stage),pyrite is rich in S and loss in Fe.It reflects that the mineralization stage of polymetallic sulfide is not only the stage of gold enrichment,but also rapid enrichment of pyrite.It is in-dicated that geochemical environment with rich sulfur and loss of Fe is favorable for the precipitation of gold ore.The physical characteristics of pyrite and quartz scale also show that the parameters of pyrite and quartz are slightly higher in the polymetallic sulfide stage,which indicate that there is a corresponding re-lationship between the variation of reflectivity and unit cell parameters.关键词
黄铁矿/石英/晶形/标型矿物/成因矿物学/旧店金矿Key words
Pyrite/quartz/crystal/typomorphic mineral/mineralogy/Jiudian gold deposit分类
天文与地球科学引用本文复制引用
李洪奎,李军,禚传源,耿科,梁太涛..山东旧店金矿成因矿物学研究及其意义[J].山东国土资源,2016,32(3):1-9,9.基金项目
该文受山东地质勘查基金项目山东省胶东地区金矿深部成矿机制与找矿方法研究(2010061)、山东省招远-莱州地区金矿成矿条件和成矿规律研究(2012003)和山东省泰山学者建设工程专项经费联合资助 （2010061）
