CAJ | 학술논문

为了查明新疆、青海、俄罗斯三地所产糖白玉的结构、成分和成因差异,在观察原料外观特征的基础上,采用常规宝石学方法、偏光显微镜、X射线粉末衍射仪和电子探针研究新疆、青海、俄罗斯糖白玉样品,从结构类型、矿物组成、化学成分和成因特征等方面进行对比分析。结果表明,以上三地糖白玉的主要矿物组成均为透闪石,次要矿物组成则各有不同。新疆、俄罗斯糖白玉以毛毡状变晶结构为主,青海糖白玉以纤维状变晶结构和纤维-隐晶质变晶结构为主;初步认定以上三地糖白玉的糖色为次生色,主要由褐铁矿导致。结合相关地质背景和风化作用特征,推测以上三地糖白玉不同的外观特征主要受玉体成矿后期和成矿期结束后周围环境变化的影响。
위료사명신강、청해、아라사삼지소산당백옥적결구、성분화성인차이,재관찰원료외관특정적기출상,채용상규보석학방법、편광현미경、X사선분말연사의화전자탐침연구신강、청해、아라사당백옥양품,종결구류형、광물조성、화학성분화성인특정등방면진행대비분석。결과표명,이상삼지당백옥적주요광물조성균위투섬석,차요광물조성칙각유불동。신강、아라사당백옥이모전상변정결구위주,청해당백옥이섬유상변정결구화섬유-은정질변정결구위주;초보인정이상삼지당백옥적당색위차생색,주요유갈철광도치。결합상관지질배경화풍화작용특정,추측이상삼지당백옥불동적외관특정주요수옥체성광후기화성광기결속후주위배경변화적영향。
In order to identify the differences of structures,mineral components and genesis among the brown-white nephrites from Xinjiang,Qinghai in China and Russia,on the basis of appearance characteristics observation,this paper investigates the brown-white nephrite samples from Xinjiang,Qinghai in China and Russia by means of conventional gemmological methods,polarizing microscope,XRD and EPMA,and carries out a comparative analysis of structures,mineral components,chemical compositions and formation reasons.The results show that the main mineral component of the brown-white nephrite samples is tremolite while the secondary mineral component is different.The brown-white nephrite samples from Xinjiang in China and Russia have felt-like interweaving texture while the brown-white nephrite samples from Qinghai in China has fibrous blastic and fibrous cryptocrystalline texture.Brown is the secondary colour,which is caused by limonite.According to the related geological background and weathering features,it can be inferred that the different appearance characteristics of the brown-white nephrite from three localities are mainly influenced by the surrounding environment changes after the later stage and finishing stage of metallogenic period of nephrite.