论南岭东段地区锂铍铌钽矿找矿方向

The mineral prospecting direction of Li-Be-Nb-Ta deposits in East Nanling region

【研究目的】南岭东段是中国重要的锂铍铌钽多金属矿床集中区,区内锂铍铌钽关键金属矿资源潜力巨大,该区锂铍铌钽矿主攻类型和找矿突破是亟待解决的关键问题。【研究方法】本文在南岭东段进行钨锡、稀有、稀土矿产调查的基础上,系统地剖析了区域成矿地质条件、物化遥及找矿最新成果。【研究结果】提出该区燕山期和加里东期锂铍铌钽大规模成矿作用;指出该区锂铍铌钽矿主攻矿床类型为与燕山期高分异花岗岩有关的白(锂)云母钠长石花岗岩型Nb-Ta-Be-Li矿床,和与加里东晚期花岗岩有关的伟晶岩型Li-Be-Nb-Ta矿床,并划分了11处锂铍铌钽矿找矿远景区,优选了20个(6个A级、6个B级、8个C级)锂铍铌钽矿找矿靶区。【结论】建议对6个A级找矿靶区优先开展预查和普查工作,以期早日实现该区锂铍铌钽矿找矿新的重大突破。

[Objective]The East Nanling region is an important concentration area of Li-Be-Nb-Ta polymetallic deposits,and the potential of Li-Be-Nb-Ta mineral resources is huge.The main types and prospecting breakthrough of Li-Be-Nb-Ta deposits are the key issues to be urgently solved in this area.[Methods]Based on the investigation of tungsten,tin,rare and rare earth minerals,we systematically summarizd the conditions of regional metallogenic geological,geochemical and geophysical achievements and remote sensing,and latest achievements of prospecting in the east Nanling.[Results]It is proposed that the large-scale mineralization of Li-Be-Nb-Ta deposits in this area during the Yanshanian and Caledonian periods.We proposed that the main prospecting deposit types of Li-Be-Nb-Ta deposits are muscovite(lepidolite)albite granite-type related to Yanshanian highly differentiated granite,and pegmatite-type related to Late Caledonian granite.11 prospecting areas for Li-Be-Nb-Ta deposits and 20 prospecting target districts(including 6 A-level,6 B-level and 8 C-level)have been delineated.[Conclusions]It is suggested that the 6 A-level prospecting target areas should be given priority to carry out mineral exploration work,in order to achieve new major breakthroughs in the prospecting of Li-Be-Nb-Ta deposits in the East Nanling region as soon as possible.