北山地区园包山一带察哈日哈达铷稀有金属矿矿床地质特征及成因分析

察哈日哈达铷稀有金属矿是内蒙古北山地区新发现的一处矿点,产于园包山海西-印支期复式岩基北端晚三叠纪正长花岗岩体内。本文在系统分析区域成矿地质背景、矿区地质特征、矿床地质特征的基础上,对矿床成因、成矿潜力进行了研究。研究认为,铷等稀有金属矿分布在印支期碱性系列正长花岗岩中,成矿作用与岩浆后期高分异岩浆活动热液蚀变有关,矿区交代蚀变强烈,分带明显,可依次分为微斜长石化带-钠长石化带-云英岩化带,钠长石化带及其与云英岩化过渡带是铷等稀有元素的主要富集成矿带。对比分析认为：察哈日哈达铷矿同多宝山铷矿、刘家河铷矿,以及七一山铷-钨-锡矿在大地构造条件、岩浆岩条件和赋矿岩石及矿石建造等方面表现非常相似,同属于岩浆热液交代的碱性-偏碱性花岗岩型矿床,具有优越的成矿地质背景和巨大的稀有金属成矿潜力。

Geological characteristics and genesis of the Chakharihada rubidium rare metal deposit in, Yuanbaoshan surroundings, Beishan area

Chahar hada rubidium rare metal deposit is a newly discovered ore spot in Beishan area, Inner Mongolia. It occurs in the Late Triassic syenogranite at the north end of the compound batholith of Hercynian Indosinian in Yuanbaoshan. Based on the systematic analysis of regional metallogenic geological background, geological characteristics of the mining area and geological characteristics of the deposit, this paper studies the genesis and metallogenic potential of the deposit. The study shows that rubidium and other rare metal ores are distributed in the alkaline series syenogranite of Indosinian period. The mineralization is related to the hydrothermal alteration of high-fractionated magmatic activity in the later stage of magma. The metasomatic alteration of the mining area is strong and the zoning is obvious. It can be divided into microclinization zone-albitization zone-dolomitization zone, albitization zone and its transition zone with dolomitization are the main enrichment of rubidium and other rare elements Metallogenic belt. The comparative analysis shows that Chahar hada rubidium ore is very similar to Duobaoshan rubidium ore, liujiahe rubidium ore and Qiyishan rubidium-tungsten-tin ore in terms of geotectonic conditions, magmatic rock conditions, ore bearing rocks and ore formation, which all belong to the alkaline-subalkaline granite type deposit of magmatic hydrothermal metasomatism, and therefore,it has superior metallogenic geological background and huge metallogenic potential of rare metals..