湖南沃溪金锑钨矿床稀土元素特征研究

对湖南活溪金锑钨矿床稀土元素特征的研究结果表明：在成矿过程中，稀土元素发生了从近矿围岩向含矿断裂带或成矿热液的迁移；成矿物质主要来自赋矿地层围岩，且具多源性；矿化程度不同的层脉石英矿石中的稀土总量具有明显的差异。同时指出了将热液金矿床中石英脉内稀土总含量作为找矿标志的可能性。

REE characteristics of the Woxi gold-antimony-Tungsten deposit, Hunan Province

According to31 samples of rocks and ores collected at random from various interlayer quartz veins and differentstructural positions in the ore- bearing fracture zones,near- ore wall rocks and distal rocks,REE have the following characteristics;HREE content of near- ore wall rocks is lower than that of distal wall rocks,the total amount of REE shows a gradual increasing tendency from near- ore wall rocks to the center of the ore- bearing fracture zone. With the intensification of structural shattering,the total REE amount of each tectonite within the fracture goes up.The REE partitioning modes of most interlayer quartz veins are similar to the mode of the Proterozoic strata.The total amount of REE in interlayer quartz veins with good mineralization and considerable reserves is very low,whereas things are just the opposite for those with poor gold mineralization and reserves.It is shown from studies on characteristics of REE that,during mineralization,migration and loss of HREE took place,that REE migrated from near- ore wall rocks to the ore- bearing fracture zone,that the total REE amount of fracture tectonites has a direct correlation with tectonic stress,strain strength and shattering extent,and that ore- forming materials came mainly from host wall rocks and are of multisource nature.The possibility of using the total amount of REE in in- terlayer quartz veins of hydrothermal gold deposits as one of the prospecting criteria is also pointed out in this paper.