青海软玉的成分及结构特征

青海软玉矿床产于中酸性侵入岩与大理岩接触带中.其主要矿物为透闪石.利用X射线粉晶衍射、电子探针等测试手段, 对软玉的矿物成分、化学成分进行了研究分析.通过对青海软玉显微结构的观察与研究, 按其主要矿物透闪石组分的表现形式, 较为系统地划分青海软玉的主要结构类型为: 毛毡状结构、显微纤维-隐晶质结构、显微纤维结构、显微叶片状-隐晶质结构、显微叶片状结构以及放射状纤维结构.

Study on Compositions and Texture Characteristics of Nephrite from Qinghai Province

Nephrite deposits in Qinghai Province have occurred in contact belt between intermediate-acidic intrusive rocks and dolomite-marble. The main mineral of Qinghai nephrite is tremolite. Using the X-ray powder diffraction, the electronic probe, etc, the mineral compositions and chemical compositions of the nephrite are analyzed. The texture can be systematically classified as the six types: the felt-like texture, the micro-fibrous cryptocrystalline texture, the micro-fibrous texture, the micro-leaf-like cryptocrystalline texture, the micro-leaf-like texture and the radiated fibrous texture.