俄罗斯西萨彦岭翡翠矿床特征

CHARACTERISTIC OF WESTERN SAYAN JADEITE JADE DEPOSIT IN RUSSIA

近年有机会获得了大量的俄罗斯西萨彦岭翡翠原料标本。利用显微镜、电子探针、X光分析等技术手段，对该矿床的矿石类型、矿物组合及结构构造等作了初步研究，并与缅甸翡翠矿床进行了对比。研究发现，翡翠矿床（俄罗斯、缅甸翡翠矿床）热浪活动有多期性，颜色鲜艳的翠绿色翡翠或多或少含有后期生成的翠绿色的钠铬辉石或绿辉石。俄罗斯西萨彦岭翡翠矿床的Cr2O3含量远低于缅甸翡翠矿床的，是西萨彦崎翡翠质量总体决于缅甸翡翠的重要原因。俄罗斯翡翠矿石具有重结晶作用形成的球粒结构和束状结构以及糜棱状和眼球状构造，并伴有多组裂隙。表明该矿床构造活动频繁，活动期温度压力变化大，重结晶作用明显。

In recent years, author has received many jadeite jade raw materials ftom Western Sayan,Russia, and has opportunity to study Western Sayan jadeite jade deposit. Using microscope. electronprobe and X-ray, this paper emphashes on the investigation of ore tyoe, mineral paragenesis and microfabric of Western Sayan jadeite jade deposit in Russia and the comparison between Western Sayan andBurmese Jadeite jade. The tesearch indicates tbat the hydrothermal fluid activizes multiperiodically andthe emerald green jadeite jade contains more or less kosmochlor or omphacite which formed in the latestage. That the content of Cr2O3 of Western Sayan jedeit jade deposit is far lower than that of Burmese,results in lower quallty of Sayan jndeite jade than that of Burmese. Jadeite jade ore of Western Sayanpossesses the sphetulitic and packet textures which formed by recrgutallization and mylonitic and eyedstructures associated with multlgroup cracks. It can be concluded that oreroontrol tectonic activized ftequently; Temperature and pressure in active period vary greatly and recrystallization is obvious.