“八〇一”稀有稀土矿床碱性花岗岩的含矿性、矿化规律及成因分析
Ore Potentiality, Mineralization Laws and Genesis of Alkaline Granite in 801 Rare REE Deposit
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摘要: 内蒙古通辽市扎鲁特旗与碱性花岗岩有关的“八〇一”特大型稀有稀土矿床位于巴尔哲北北东向背斜构造部位，以Nb、Y、Ta为主，伴生Be等多种稀有稀土元素。含矿岩体为普遍矿化的燕山期碱性花岗岩，且碱性花岗岩体与“八〇一”稀有稀土矿床具有生成关系。通过对碱性花岗岩的岩石特征及含矿性、含矿元素的变化规律、岩石化学成分与稀有元素的关系、矿化元素的富集规律及矿床成因进行综合分析，认为“八〇一”稀有稀土矿床为碱性花岗岩岩浆晚期分异交代型矿床。Abstract: Related to alkaline granite, the 801 oversize rare REE deposit lies in Ba'erzhe anticline of NNE direction, Zhalute territory of Tongliao City, Inner Mongolia. Mainly composed of niobium (Nb), yttrium (Y), tantalum (Ta), the deposit also contains various rare REE such as beryllium (Be) and so on. The ore-bearing rock is mineralized alkaline granite formed during Yanshanian, and its ore body has generation relations with the 801 rare REE deposits. The author has comprehensively analyzed the alkaline granite from perspectives of petrological characteristics, ore potentiality, the variation law of ore-bearing elements, the relationship between rock chemical composition and rare elements, the enrichment patterns of mineralization elements and genesis of deposit, and concluded that 801 REE deposits belong to late magmatic differentiation metasomatic deposits of alkaline granite.
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Key words:
- REE deposit /
- alkaline granite /
- genetic type
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