赣南地区伟晶岩型锂矿资源禀赋特征与新进展

锂被誉为21世纪绿色高能金属。文章报道了赣南地区伟晶岩型锂矿资源禀赋与新发现含锂磷酸盐矿物“磷锂铝石”的特征。从分析已知锂矿床的成矿地质特征、查明锂资源量的空间分布入手,对比典型矿床“锂辉石”与新发现“磷锂铝石”特征、含锂伟晶岩脉的矿物组成及分带性、新发现1:5万锂异常等。研究认为：赣南地区伟晶岩型锂矿床空间上,主要分布于加里东期酸性侵入岩(会同岩体)的外接触带,赋矿地质体为花岗伟晶岩脉,主要控矿构造为北东向和北东东向张性裂隙、加里东期紧闭褶皱转折端虚脱构造,含锂矿物主要为锂辉石及磷锂铝石。本次工作新发现“磷锂铝石”、新圈定“胜和找矿远景区”、预测LiO₂潜在资源量为15.36万t,对拓展武夷山成矿带南部锂矿后续的找矿方向,有重要指示意义。

New progress of pegmatite type lithium mine and resources endowment characteristics in southern Jiangxi province

Lithium is praised as the green high energetic metal in the 21st century. In this paper, we reported the its endowment characteristics and a newly discovered "lithium-bearing phosphate mineral" (amblygonite) in southern Jiangxi Province. The geological characteristics of typical deposit and spatial distribution of lithium resources are summarized in this study. Comparisons between the newly discovered amblygonite and spodumene as well as newly discovered anomaly and typical deposit anomaly were carried out to shed light on, the mineral assemblage and zonation of lithium-bearing pegmatite vein. The analysis results show that the pegmatite type lithium deposits are mainly distributed in the external contact zone of the Caledonian intrutions (Huitong rock), the ore-bodies are granitic pegmatite dikes, ore-controlling structures are mainly NE and NEE-trending tensile cracks and turn end collapse structures of the Caledonian tight folds, dominant lithium-bearing minerals are spodumene and amblygonite. The newfound amblygonite and Shenghe prospecting area that has potential LiO2 resources of 0.1536 million tons. Are significant to expand the subsequent prospecting of lithium mines in the southern Wuyishan metallogenic belt.