代县碾子沟金红石矿床金红石特征

Rutile Characteristics of Nianzigou Rutile Deposit in Daixian

碾子沟金红石成矿期可分为7个,第1、2期为变质成因、第3～7期为蚀变成因,构成工业矿体的主要为第5、6期、呈不规则团块状集合产出的蚀变型粗粒金红石。金红石中杂质出现的概率与平均含量呈明显的正相关性,含量特高的杂质为铁。蚀变型金红石,红外图谱特征与标准金红石的一致,杂质总量明显低于中低压变质型金红石、略高于高—超高压变质型金红石,是制造高档钛白粉和提炼钛金属的优质原料,稀土总量为2 113×10-6,Y明显高于其他稀土元素,稀土元素分布模式呈凹型,是一种新的分布模式。

There are 7 stages of rutile-formation that first and second are metamorphogenetic and that other are alteration-genetic.Most of rutiles consisting of industrial orebodies are formed by alteration in 5th and 6th stages,which appears in form-unregular block and their size are coarse.There is remarkable positive correlationg between appearing probability and average content of rutile impurity.Fe-content is highest among all impurities.Infra-red spectrum of the alteration-genetic rutile is same from standard one.The alteration-genetic rutile is high-quality materials for supper titanium pigment and Ti-metal,because sum of its impurities is remarkably lower than middil-low-pressure metamorphic rutile,although it is slightly higher than high-super-high-pressure metamorphogenetic rutile.∑REE of the alteration-genetic rutile is 2 113×10-6,Y content is remarkable higher than other REE.The hollow form distribution model of REE of alteration-genetic rutile is a new pattern of rock and mineral.