拉曼光谱在危地马拉翡翠矿物组成中的应用研究

Raman Spectroscopy Study on the Mineral Composition of the Guatemalan Jade

危地马拉是缅甸之外的另一个翡翠的商业性产地,危地马拉翡翠通常是多种矿物成分的集合体,其矿物组成具有特色,与缅甸翡翠的不同。以危地马拉紫色和灰绿色翡翠为研究对象,通过激光拉曼光谱测试分析,对其结构特征及共生矿物组成特点进行了研究。结果表明,危地马拉翡翠中的主要组成矿物为硬玉,并伴有多种共生矿物。危地马拉翡翠的共生矿物包括五类,其中深色共生矿物为角闪石,白云石,绿辉石和绿泥石,浅色共生矿物为磷灰石。其中角闪石,白云石,绿辉石和绿泥石也是缅甸翡翠中常见的共生矿物,而磷灰石在缅甸翡翠中几乎不可见。

Guatemala is another jade commercial origin in addition to the Myanmar.The Guatemalan jade is usually an assemblage of a variety of mineral compositions,and the mineral composition is unique and different from the Myanmar jade.The characteristics of the structures and paragenetic minerals of the purple and gray-green jade from Guatemala were studied by laser Raman spectroscopy analysis.The results show that the jadeite is a major constituent mineral in Guatemala jade,associated by a variety of coexisting minerals.The paragenetic minerals in Guatemalan jade can be divided into five categories,including the dark minerals hornblende,dolomite,omphacite,chlorite,and light-colored mineral apatite.The hornblende,dolomite,omphacite and chlorite are also the paragenetic minerals in the Myanmar jade,but the apatite is almost invisible in the Myanmar jadeite.