俄罗斯穆伦地区查罗石玉结构及构造特征研究  

Texture and Structure Characteristics of Charoite Jade from Murun in Russia

作　　者：李雯雯[1] 陈鸣鹤 

机构地区：[1]中国地质博物馆,北京100034 [2]北京霏卡珠宝有限公司,北京102446

出　　处：《地球学报》2017年第2期229-235,共7页Acta Geoscientica Sinica

基　　金：国土资源部部门预算项目(编号:121113000000160034)资助~~

摘　　要：本文对俄罗斯穆伦地区查罗石玉进行了系统的结构及构造特征的研究,查罗石玉的主要矿物查罗石(紫硅碱钙石)是一种富钙、钾、钠的硅酸盐矿物,根据镜下观察发现:查罗石玉显微结构特征可以分成5种类型:纤维变晶结构、放射状或帚状结构、柱状变晶结构、包含变晶结构、交代残余结构等。各种类型的查罗石玉的矿物组分以及表现形式具有很大的差异。常见的构造类型为:块状构造、片状构造、弧性构造等。扫描电镜下观察分析得出:查罗石主要由细长矩形的片状查罗石组成,查罗石晶体呈定向排列,晶体大小平均长约150~200μm,宽约10~20μm,发育良好的多组波状弯曲的片状查罗石晶体及其纤维变晶结构是查罗石玉具有丝绢光泽的原因。结合前人资料,以及本文对查罗石玉的测试研究,初步判断查罗石成因为热液交代型。In this paper, the authors studied texture and structure characteristics of charoite jade from Russian Murun. The results show that the main mineral of charoite jade is charoite. It is found that the chemical composition is characterized by rich K, Na and Ca. The charoite jade specimens show mainly the following texture types： fiberic crystalloblastic texture, radiating （broom-like） crystalloblastic texture, prismatic crystalloblastic texture, poikilitic crystalloblastic texture and metasomatic relict texture. The observation of charoite jade by SEM shows that the average crystal size is about 150~200 μm in length and 10~20 μm in width. The fiberic texture is responsible for its silky gloss. According to the previous data and the study of charoite jade, the authors tentatively hold that the charoite jade might be genetically of hydrothermal metasomatic type.

关 键 词：俄罗斯穆伦 查罗石玉 结构 构造 

分 类 号：P619.283[天文地球—矿床学] P583[天文地球—地质学]