摘要
栗木矿区是华南重要的钨锡稀有金属矿床之一,通过对栗木铷矿床地质特征的研究发现,该矿床具有明显的时空分布规律:主要富集在燕山早期的3个阶段,并具有随岩体演化程度增高而进一步富集的趋势;同一阶段同一岩体的水平剖面上,Rb_2O含量具有岩体边部高、中心低的特点;垂直剖面上,Rb_2O含量总体变化不大,岩体顶部相对富集。同样,在花岗岩中云母和钾长石中的Rb也有一定的规律:在不同阶段或者不同岩体中,云母的Rb_2O含量都比钾长石中的高;无论钾长石还是云母中Rb2O的含量,在燕山早期的第三阶段都比第二阶段更高,可见铷矿化随着岩浆分异而逐渐增强。栗木矿区铷金属主要产于花岗岩中,根据已知的矿石量可预估伴生铷矿床已达中型,整个栗木矿区则具有大型伴生铷矿床的潜力;据前人资料估算,尾矿中的铷金属储量可达大型伴生铷矿床。今后可进一步对原生铷矿床和尾矿中的铷资源进行研究评价,从而提高矿区资源综合利用率。
Limu mining area is one of the most important W-Sn rare metal deposits in southern China. According to geological characteristics research,it is found that the distribution regularity of Limu rubidium deposit is obvious. The main enrichment,in the three stages of Early Yanshanian,has the tendency of further enrichment along with the increasing evolution degree of the rock mass. At the same stage on the horizontal section of the same rock mass,the Rb_2O content is higher on the edge and lower in the center. At the same stage on the vertical section,the Rb2 O content changes slightly,but relative rich on the top. Rubidium of the granite mainly occurs in the mica and potassium feldspar,a regularity in different stages or rock mass. The Rb_2O contents of mica are higher than that of potassium feldspar. According to the fact that the Rb2 O contents of mica or potassium feldspar in the third stage of Early Yanshanian are higher than that of the second stage,rubidium mineralization was gradually enhanced along with the magmatic differention. Rubidium metal is mainly produced in granite from Limu rubidium mining area. The ore content of the known rock mass forecasts rubidium reserves reached medium associated rubidium deposit,and the Limu mining area has a large potential associated rubidium deposit. According to the previous data,it can be estimated that the rubidium metal reserves of tailings can reach a large associated rubidium deposit. The native rubidium deposit and the tailing Rubidium resources evaluation can be further studied in the future as so to improve the comprehensive utilization of the mining resources.
出处
《桂林理工大学学报》
CAS
北大核心
2016年第1期137-143,共7页
Journal of Guilin University of Technology
基金
中国地质调查局项目(1212011120354)
关键词
铷矿
矿床地质特征
分布规律
栗木
广西
Rb deposit
geoligical characteristics of deposit
distribution regularities
Limu
Guangxi
