柿竹园钨锡钼铋矿床主要矿石矿物研究

作者通过X射线衍射、化学和电子探针分析法研究了柿竹园矿床中的主要金属矿物和少量金属矿物。黑钨矿的FeO/MnO比值接近1:1,Nb_2O_5和Ta_2O_5的平均含量分别为0.263％和0.649％。白钨矿含CaMoO_4分子0—40％,在紫外线照射下能发荧光,当MoO_3含量<0.4％时,发淡天蓝色荧光,>0.4％发白光,>2％发淡黄光,>4％则发黄光。矿石中的辉钼矿属2H_1型,含铼低。辉铋矿是所有含铋矿物中最大量的矿物,而自然铋、辉铅铋矿、斜方辉铅铋矿、针硫铋铅矿和辉碲铋矿则很少量。云英岩中锡石的Nb、Ta含量分别为0.15％和0.88％,高于其他类型中矿石的含量。大理岩网脉中的尼日利亚石含TiO_20—3.75％。脉中木锡石和黄锡矿少,还发现很少的钽钇易解石和晶质铀矿。

ORE MINERALS IN SHIZHUYUAN DEPOSIT

Major and minor ore minerals in the Shizhuyuan deposit have been studiedby X-ray diffraction, chemical analysis and electron probe analysis. The FeO/MnO ratio is close to 1: 1 in wolframite with Nb_2O_5 and Ta_2O_5 being 0.263%and 0.049% on average. In ultra-violet light it emits fluorescence, which isceruleanish when the MoO_3 content is<0. 4%; white when>0.4%; yellowish-wh-en>2% and yellow when>4%. Molybdenine in the ore is of 2H_1 type andRe content is low Bismuthinite is the most abundant bismuth mineral, whilenative bismuth, galenodismutite, cosalite, aikinite and tetradymite are minor inamounts. The Nb and Ta contents of cassiterite in greisens are 0.15% and0.88%, respectively, while those in other types of ore are relatively low. Nigerite in network veins occurring in marbles has 0-3. 75% TiO_2, and wood tinand stannite are rarely seen in these veins. Minor tantalo eschynite and uranniobite werw found as well.