陕西汉中玉(蛇纹石)矿物学及成因研究

陕西汉中玉(蛇纹石)具有重要的美学和经济价值，其矿物成因尚缺乏深入研究，本文在野外矿区实地考察、样品采集的基础上，通过扫描电镜、X射线荧光、ICP-MS分析、X射线粉晶衍射、红外光谱等测试手段，对陕西汉中玉(蛇纹石)的矿物组成、内部结构、地球化学成分、物相结构以及谱学特征做了系统研究，查明该区汉中玉主要矿物为蛇纹石，具有富镁贫硅的典型产地特征，形成于中酸性岩浆与碳酸盐接触的矽卡岩中，形成过程主要可分为两个期次，两期次蛇纹石在外观颜色、内部结构、化学成分有所差异。研究成果可为今后汉中蛇纹石的产地鉴定以及矿床开采提供依据。

Mineralogy and genesis of the serpentine jade in Hanzhong, Shaanxi

Based on field investigation and sample collection in the field mine,the mineral composition, internal structure, geochemical composition, phase structure and spectral characteristics of Hanzhong jade (serpentine) were systematically studied by means of scanning electron microscope, X-ray fluorescence, ICP-MS analysis, X-ray diffraction and infrared spectroscopy. It is proved that lizardite is the main mineral composition of Hanzhong jade which is rich in magnesium and poor in silicon. Serpentine was formed in the skarn environment where carbonate was in contact with intermediate-acid magma. The formation process of serpentine deposit can be divided into two stages, and the appearance color, internal structure and chemical composition of serpentine are different between the two stages. These studies provides scientific basis for the identification of origin and mining of Hanzhong serpentine.