粤北石人嶂莲花山隐伏花岗岩侵入体岩浆动力学特征分析  

Magmatic Dynamics Characteristics of Concealed Granite Intrusions in Lianhuashan,Shirenzhang,Northern Guangdong Province

作　　者：吴限[1] 江晓龙 韦龙明[1] 刘驹先 袁琼[1] 田晗钰 

机构地区：[1]桂林理工大学地球科学学院,广西桂林541000 [2]福建省煤田地质勘查院,福建福州364021

出　　处：《地质与勘探》2018年第1期31-40,共10页Geology and Exploration

基　　金：国家深部探测计划专项研究课题(编号:Sino Probe-03-01);全国危机矿山接替资源勘查项目(编号:200644089);2017年广西硕士研究生创新项目(编号:YCSW2017152);2017年广西大学生创新创业训练计划项目(编号:201710596091)联合资助

摘　　要：基于矿床地质特征的研究,以构造地质学、流体力学等为主要研究手段,对粤北石人嶂矿区含钨矿花岗岩侵入体进行分析。通过对岩体形成时的温压条件、岩浆密度、岩浆粘度、岩浆冷凝速度等岩浆动力学参数进行计算,并分析岩浆动力学特征,发现了密度值随温度的变化规律,对于侵位过程中的能量聚集有利,冷却速度缓慢,因而有足够的时间满足任何晶体生长。通过花岗岩体侵位机制的深入探讨,查明了岩体侵位与钨矿化的关系,为总结矿床的成因提供了流体动力学依据,为矿床成因探讨和矿山可持续开发利用提供了科学依据。Based on deposit geology,structural geology and fluid mechanics, we have analyzed the tungsten-bearing granite intrusions in the Shirenzhang mine, northern Guangdong Province. We have calculated the temperatures and pressures, magma density, magma viscosity, and magma cooling velocity during the formation of rock mass and described the magmatic dynamic features, and found the change law of the density with the temperature. The results indicate that it is favorable for energy accumulation during the process of emplacement, and the slow cooling permitted sufficient time to ensure any crystal growth. Then we made a discussion on granite emplacement mechanism and elucidated the relationship between the emplacement and tungsten mineralization. This study provides a hydrodynamic basis for understanding the genesis of the deposit, and offers scientific evidence for development and utilization of the mine.

关 键 词：流体力学 花岗岩侵入体 岩浆动力学特征 岩浆动力学参数 侵位机制 石人嶂矿区 粤北 

分 类 号：P168.67[天文地球—天文学]