本文選題：甲基卡 + 鋰輝石��； 參考：《西南科技大學(xué)》2015年碩士論文

【摘要】：四川甲基卡偉晶巖型礦區(qū)是我國(guó)規(guī)模最大的鋰礦聚集區(qū)。該礦區(qū)位于松潘-甘孜造山帶,形成于中生代,具有礦床規(guī)模大、種類齊全等特點(diǎn),是研究稀有金屬偉晶巖的理想?yún)^(qū)域。X03號(hào)脈為該礦區(qū)新發(fā)現(xiàn)特大型鋰礦,其物質(zhì)組成以及元素富集規(guī)律尚不明確,目前,該脈體的研究程度很低。本文在野外地質(zhì)調(diào)查及礦床地質(zhì)特征的研究基礎(chǔ)上,通過(guò)較為系統(tǒng)的樣品采集及分析測(cè)試,對(duì)X03號(hào)脈的礦物學(xué)特征、鋰元素富集規(guī)律進(jìn)行了研究。通過(guò)研究取得了以下認(rèn)識(shí):X03號(hào)脈中鋰礦石質(zhì)量高,具獨(dú)立開發(fā)價(jià)值,其它稀有元素(如銣、鈮、鉭等)富集程度也達(dá)到了伴生品位的要求,具有一定的開發(fā)利用價(jià)值。脈體各結(jié)構(gòu)帶中鋰元素富集濃度均較高,其中含梳狀鋰輝石偉晶巖帶鋰元素富集濃度最高;但脈體中起主導(dǎo)作用的結(jié)構(gòu)帶為含細(xì)晶鋰輝石偉晶巖帶。鋰元素主要以獨(dú)立礦物鋰輝石(主要)富集于脈體中,少量以離子形式分散于云母、電氣石、長(zhǎng)石、石英、鈮鉭鐵礦、石榴子石等礦物,其絕對(duì)分散值為0.089%。各結(jié)構(gòu)帶主要礦物中,同一礦物在不同的產(chǎn)出部位,其鋰元素含量具有一定的差異,但不同的造巖礦物在相同的結(jié)構(gòu)帶中并沒(méi)有表現(xiàn)一定的規(guī)律性。鋰輝石不因其自然類型的差異而大幅度改變自身鋰的含量。X03號(hào)脈體在三度空間上鋰元素分布中表現(xiàn)為沿礦脈走向,中間富,兩端貧;沿礦脈厚度方向,礦化富集規(guī)律不明顯、貧富關(guān)系呈震蕩性變化;沿傾斜方向,Li2O富集與厚度向方向變化基本一致。
[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.
【學(xué)位授予單位】：西南科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.71

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本文編號(hào)：2015799