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含稀有、稀土花岗岩型矿床是受地洼构造控制成矿的,成矿岩体产于中生代燕山期,根据同位素地质年龄测定资料大致在180—70×10~6年,矿床类型可归纳为六种;含钇花岗岩型,钇铌型,含铌铁矿型,含铌钽型,富钽型,含钽锂型,前三者,产于燕山早、中期,规模较大,呈大岩体或者岩株形式产出,面积有数十、数百平方公里,后三者呈小岩株、岩枝、岩床,岩脉等形式产出,面积由零点几平方公里至数平方公里。含矿岩体是同期多阶段生成,有明显的分相特征,一般具边缘相,中心相,过渡相,含矿岩体中常见到有钾长石化、钠长石化、白云母化、黑鳞云母化、锂白云母化,锂云母化,黄玉化,电气石化……等,可作为蚀变找矿标志。 含矿花岗岩SiO_2含量〉73％,富Si、K、Na、Li、Al及挥发组份。 主要矿物有磷钇矿、褐钇铌矿、铌铁矿、铌钽铁矿、铌钽锰矿、细晶石、钽钇矿、铌钇矿等,副矿物主要有钛铁矿、锆石、黑钨矿、锡石、绿柱石等。锡石、黑钨矿可作为寻找铌、钽花岗岩型矿床的标志。 矿体有分带富集规律,总体看,一般矿化富集在岩体顶部和边缘,而岩体中心及深部则含量较低。
The rare-earth-bearing granite-hosted deposits are controlled by the Gewa structure and the ore-forming rocks are produced in the Mesozoic Yanshanian period. According to the data of isotopic geological age, the data are roughly from 180 to 70 × 10-6 years. The deposit types can be summarized as six Yttrium granite type, yttrium and niobium type, niobite-bearing type, niobium-tantalum type, tantalum-rich type and tantalum-containing lithium type. The first three are produced in the early and mid- Or rock form output, an area of dozens, hundreds of square kilometers, the latter three small rock, rock branches, bed, dikes and other forms of output, the area from a few square kilometers to several square kilometers. Ore-bearing rock mass is formed in the same stage and multi-stage, with obvious phase-separation characteristics. Generally, it has marginal facies, central facies and transitional facies. There are commonly kalinite, albite, muscovite, Michemization, Lithium mica, Lithium Michemization, Topaz, Electrochemical ... ..., etc., can be used as a symbol of alteration prospecting. The ore-bearing granite contains more than 73% SiO 2, rich in Si, K, Na, Li, Al and volatile components. The main minerals are xenotime ore, brown yttrium niobium ore, niobium iron ore, niobium tantalite, niobium tantalum manganese ore, fine spar, tantalum ore, niobium yttrium ore, etc., the main mineral ilmenite, zircon, black Tungsten ore, cassiterite, beryl and so on. Cassiterite, wolframite can be used as a search for niobium, tantalum granite deposits sign. The orebodies have zonal enrichment law. Generally speaking, the general mineralization is enriched in the top and edge of the rock mass, while the content in the center and deep of the rock mass is lower.