四川甲基卡X03号脉锂元素富集特征研究

发布时间：2018-06-13 22:47

本文选题：甲基卡 + 锂辉石　；参考：《西南科技大学》2015年硕士论文

【摘要】：四川甲基卡伟晶岩型矿区是我国规模最大的锂矿聚集区。该矿区位于松潘-甘孜造山带,形成于中生代,具有矿床规模大、种类齐全等特点,是研究稀有金属伟晶岩的理想区域。X03号脉为该矿区新发现特大型锂矿,其物质组成以及元素富集规律尚不明确,目前,该脉体的研究程度很低。本文在野外地质调查及矿床地质特征的研究基础上,通过较为系统的样品采集及分析测试,对X03号脉的矿物学特征、锂元素富集规律进行了研究。通过研究取得了以下认识:X03号脉中锂矿石质量高,具独立开发价值,其它稀有元素(如铷、铌、钽等)富集程度也达到了伴生品位的要求,具有一定的开发利用价值。脉体各结构带中锂元素富集浓度均较高,其中含梳状锂辉石伟晶岩带锂元素富集浓度最高;但脉体中起主导作用的结构带为含细晶锂辉石伟晶岩带。锂元素主要以独立矿物锂辉石(主要)富集于脉体中,少量以离子形式分散于云母、电气石、长石、石英、铌钽铁矿、石榴子石等矿物,其绝对分散值为0.089%。各结构带主要矿物中,同一矿物在不同的产出部位,其锂元素含量具有一定的差异,但不同的造岩矿物在相同的结构带中并没有表现一定的规律性。锂辉石不因其自然类型的差异而大幅度改变自身锂的含量。X03号脉体在三度空间上锂元素分布中表现为沿矿脉走向,中间富,两端贫;沿矿脉厚度方向,矿化富集规律不明显、贫富关系呈震荡性变化;沿倾斜方向,Li2O富集与厚度向方向变化基本一致。
[Abstract]:The methyl-kafalite type mining area in Sichuan Province is the largest lithium ore accumulation area in China. The ore area is located in the Songpan-Ganzi orogenic belt and formed in the Mesozoic. It has the characteristics of large scale and complete variety of ore deposits. It is an ideal area for studying pegmatite of rare metals. The X03 vein is the newly discovered super large lithium deposit in this area. The material composition and the law of element enrichment are not clear, but the study of this vein is very low at present. Based on the field geological investigation and the study of the geological characteristics of the deposit, the mineralogical characteristics of the X03 vein and the regularity of the enrichment of lithium elements are studied through systematic sample collection and analysis and testing. Through the research, the authors have obtained the following understanding: the lithium ore in the W X03 vein has high quality and independent development value, and the enrichment degree of other rare elements (such as rubidium, niobium, tantalum, etc.) has also reached the requirements of associated grade, and has certain value of exploitation and utilization. The concentration of lithium in each structural belt of vein is high, and the concentration of lithium is the highest in the comb spodumene pegmatite belt, but the structure belt with fine grain spodumene pegmatite plays a leading role in the vein. Lithium is mainly enriched in vein by independent mineral spodumene, and dispersed in mica, tourmaline, feldspar, quartz, niobium tantalite, pomegranate in ion form. Its absolute dispersion value is 0.089. In the main minerals of each structural belt, the content of lithium element in the same mineral is different in different sites, but different rock-forming minerals do not show certain regularity in the same structural zone. Spodumene does not change its lithium content greatly because of the difference of its natural type. X03 vein body shows that the distribution of lithium elements in three dimensions is along the direction of the vein, rich in the middle, poor at both ends, and the regularity of mineralization and enrichment is not obvious along the direction of the thickness of the vein. The relationship between rich and poor is oscillating, and the enrichment of Li2O along the inclined direction is basically consistent with the change of thickness.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.71

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