热液矿床石英阴极发光环带与微量元素关系

Relationship between quartz cathodoluminescence zone and trace elements in hydrothermal deposit

热液矿床成因机制是矿床学研究的重要科学问题。热液矿床石英阴极发光环带特征及其与微量元素的相关关系可以一定程度地反映石英形成时的物理化学条件,为矿床成因研究提供一些参考。因此,在前人研究基础上,综合讨论了卡林型、浅成低温热液型、密西西比河谷型以及斑岩型矿床中石英阴极发光环带与微量元素的相关关系及其指示意义。结果显示,在斑岩型矿床中,利用石英中Ti与CL强度相关关系可以一定程度地衡量矿床中石英的结晶温度。另外,不同热液矿床中石英Al浓度也可以用于热液pH值、结晶温度及石英结晶速率的探讨。

The genetic mechanism of hydrothermal deposits is an important scientific issue in the study of deposits.The characteristics of quartz cathodoluminescence zone and their correlation with trace elements can reflect the physical-chemical condition of quartz formation to a certain extent,and can also provide some references for the study of deposit genesis.Therefore,on the basis of previous studies,this paper comprehensively discusses the correlation between quartz cathodoluminescence zone and trace elements in Carlin,epithermal,Mississippi Valley and porphyry deposits and the indicative significance.The result shows that in porphyry deposits,the crystallization temperature of quartz can be effectively measured by using the correlation between the Ti contents and cathodoluminescence intensity in quartz.In addition,the Al content of quartz in different hydrothermal deposits can also be used to explore the hydrothermal pH value,quartz crystallization temperature and quartz crystallization rate.