南秦岭两河地区伟晶岩型铷矿地质特征及资源潜力评价

Metallogenic geological characteristics and resource potential evaluation of pegmatite rubidium ore in Lianghe area,shaanxi Province,South Qinling Mountains

秦岭是我国重要的花岗伟晶岩分布区和稀有金属成矿区,广泛发育各种类型的花岗伟晶岩脉,在开展饶峰幅矿调过程中新发现两河地区伟晶岩型铷等稀有金属矿产。新发现的铷矿产于燕山期花岗伟晶岩中,区内含铷等稀有金属伟晶岩脉矿体规模大,延伸长,铷矿化均匀,Rb2O含量较高,局部伟晶岩脉中Li2O达到工业品位。通过对铷矿体产出位置、矿体特征,矿石成分及铷赋存状态的分析研究,认为铷主要赋存于微斜长石和白云母中,成因类型为花岗伟晶岩型矿床,结合区内地质背景、伟晶岩脉发育程度、铷等稀有元素矿化特征,认为区内成矿地质条件良好,具有较大的铷等稀有金属矿产的找矿前景,并对铷矿进行资源潜力评价,为下一步找矿提供依据。

Qinling is important granitic peogmatite distribution area and rare metal metallogenic area in China. Various types of granitic pegmatite dikes are widely developed. rare metal minerals such as pegmatite rubidium are newly discovered in the process of Rao Feng amplitude adjustment. The newly discovered rubidium ore is found in Yanshanian granitic pegmatite,which contains large scale,long extension,uniform rubidium mineralization and high Rb2O content,and the Li2O in local pegmatite dikes reaches industrial grade.Based on the analysis of the analysis of the occurrence location,orebody characteristics,ore composition state of rubidium orebody,it is considered that rubidium mainly occurs in microplagioclase and Muscovite,and the genetic type is granitic pegmatite deposit.Combined with the geological background,the development degree of pegmatite dikes and the mineralization characteristics of rubidium and other elements in the area,it is considered that the metallogenic geological conditions in the area are good and have alarge prospecting prospect of rare metal minerals such as rubidium,and the resource potential of the lock is evaluated. It provides the basis for the next step of rospecting.