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对我国浙江青田山炮绿、福建寿山月尾绿以及西安绿3种绿色图章石分别利用X射线衍射、电子探针、环境扫描电镜以及能谱分析对其矿物成分、化学成分、微形貌特征以及颜色成因等方面进行了研究.研究发现,3种图章石的绿色部分均由具二八面体结构的2M1型多硅白云母组成,属于云母型图章石;它们的次要矿物组成中山炮绿含有白云石、黄铁矿和磷灰石,月尾绿含有高岭石,西安绿含有白云石,次要矿物组成对绿色图章石的产地鉴定具有一定意义.3种白云母的微形貌特征揭示了西安绿中白云母结晶程度高于月尾绿中白云母,而山炮绿中白云母经历热液蚀变后晶形不完整重结晶程度不高.另外,白云母八面体层中杂质离子的化学成分分析表明,月尾绿和西安绿中白云母的绿色是由Fe3+和Ti4+离子形成,而山炮绿的翠绿颜色主要由白云母中Cr3+离子以及Fe3+、Ti4+离子共同作用形成.
In this paper, we analyzed the mineral composition, chemical composition, micromorphology, and the chemical composition of three green seal stones in Qingtian Mountain in Zhejiang Province, Yuewei Lushu in Shoushan, Fujian Province and Xi’an Green by using X-ray diffraction, electron probe, environmental scanning electron microscope and energy spectrum analysis Color, etc. The study found that the green parts of the three kinds of stamp stone are composed of 2M1-type polysilicone with octahedron structure and belong to the mica-type stamp stone; their secondary mineral composition is that Dolomite, pyrite and apatite, kaolinite containing kaolinite and Xi’an green containing dolomite, and the secondary mineral composition has certain significance for the identification of the origin of the green seal stone.The micro-topographical features of the three muscovites The degree of crystallization of muscovite in Xi’an green is higher than that of muscovite in the end of the green, but the degree of incomplete recrystallization of the muscovite is not high after the muscovite has been hydrothermally altered. In addition, the chemistry of impurity ions in the muscovite octahedron Composition analysis shows that the green of muscovite in the green tail of Moon Moon Green and Xi’an is formed by Fe3 + and Ti4 + ions, whereas the green color of the mountain cannonite is mainly composed of Cr3 + ions and Fe3 + and Ti4 + ions from muscovite Used to form.