| 略阳玉的矿物学研究 |
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| 引用本文： | 杨晨艺,刘养杰,熊潇,冯杨伟,刘东星.略阳玉的矿物学研究[J].西北地质,2012(2):99-105. |
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| 作者姓名： | 杨晨艺 刘养杰 熊潇 冯杨伟 刘东星 |
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| 作者单位： | 西北大学地质学系,陕西西安710069;西北大学大陆动力学国家重点实验室,陕西西安710069 |
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| 基金项目： | 西北大学国家基础学科人才培养基地"地质学创新基金"，国家973项目，大陆动力学资助研究项目(2009) |
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| 摘 要： | 略阳玉首次发现于勉-略缝合带内.该玉石颜色呈翠绿色与白色相间,半透明,具有油脂光泽,致密结构,硬度较大.通过手标本、薄片观察、X射线衍射、红外光谱以及拉曼光谱等方法,综合分析了略阳玉的宏观与微观特征.研究表明:略阳玉主要由石英和菱镁矿组成,岩石名称为菱镁石英岩,是超基性岩蚀变而形成的.玉石矿物分布均匀,矿物结晶程度不好,颗粒细致,成微结构.玉石主量元素分析表明:SiO2的含量分别为30.72％～44.53％,Mg/Fe原子比为9.206～14.297.玉石微量元素显示,玉石中Cr和Ni含量极高,导致玉石呈鲜绿色.略阳玉稀土含量非常低.综合主、微量和稀土元素分析.玉石原岩应为镁质超基性岩,玉石是碳酸岩及部分硅质溶液交代了超基性岩发生蚀变而形成.研究显示略阳玉质地均匀致密,结晶程度差,满足作为玉石的条件.
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| 关 键 词： | 略阳玉 菱镁石英岩 超基性蚀变岩 矿物学特征 |
A Mineralogical Study on Lueyang Jade |
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| YANG Chen-yi
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LIU Yang-jie
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XIONG Xiao
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FENG Yang-wei
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LIU Dong-xing.A Mineralogical Study on Lueyang Jade[J].Northwestern Geology,2012(2):99-105. |
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| Authors: | YANG Chen-yi LIU Yang-jie XIONG Xiao FENG Yang-wei LIU Dong-xing |
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| Institution: | 1 , 2 ( 1.Department of Geology , Northwest University , Xi′an 710069 , China ; 2.State Key Laboratory of Continental Dynamics , Northwest University , Xi′an 710069 , China ) |
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| Abstract: | Lueyang Jade , alternating with the colors of emerald green and white , has the characteristics of dense structure , translucency , greasy luster and high degree of hardness , is firstly found in Mianlue suture zone.By the means of hand specimen , thin section observation , XRD , infrared spectrum and Raman spectrum analysis , the macroscopic and microscopic characteristics of the Lueyang Jade are multidisciplinary analyzed.The study results show that the Lueyang Jade is mainly made of quartz and magnesite , and the jade is magnesia quartz rock.The minerals , with poor degree of crystallization , have the even distribution and fine grains in Lueyang Jade , forming the micro-structure.The analysis of main elements shows that the amount of SiO 2 in the samples is 30.72%-44.53% , while atomic ratio of Mg and Fe is 9.206-14.297. And the presentation of the Lueyang Jade is emerald green , which is resulted from the elements Cr and Ni. In addition , and the abundance rare earth is fairly low.The multidisciplinary analysis of the main elements and rare earth indicates that the Lueyang Jade is altered from ultramafic rock because of the alteration of carbonate and siliceous solution.The research illustrates that the structure of the Lueyang Jade is dense and the degree of crystallization is not good , which meet the condition of forming jade. |
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| Keywords: | Lueyang Jade magnesia quartz rock altered ultra-basic rock mineralogic characteristics |
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