广西玻璃陨石元素地球化学特征-地球化学专业论文.docxVIP

IV IV 成都理工大学硕士学位论文 Through the Guangxi regional distribution of five samples of glassy meteorites can be seen in different parts that the glassy chemical composition and trace element composition of meteorites same, but different in content, on the whole, little difference; five samples REE distribution patterns similar, negative slope, light REE enrichment, flat HREE trend, five distribution patterns almost overlap, indicating that the five regional components of glassy meteorites source close to the target from the same source, should belong to the same spreading area, the source should be the mother of crust. Chinas glassy meteorites mainly in Hainan Island, Peninsula, Bobai and Baise area。It has been suggested that these three areas are part of the same group of glassy meteorites. It can be seen through the analysis of these three areas is basically the same chemical composition of glassy meteorites, and therefore should belong to the same group. 3．From the chemical composition of Glassy Meteorite in Guangxi and the standardized distribution maps of REE Chondrite, Glassy Meteorites has no common with Heavenly body rock, moreover, there is a huge difference with Mare Basalt, Highlands Anorthosite and various kinds of basic rocks. From the point view of chemical composition, Glassy Meteorite is similar with near-surface sediments (clay rock, shale and sandstone) or acid rock, however, from the point view of trace elements, Glassy Meteorite is much closer to surface sediments. As a result, the sources of Glassy Meteorite are more likely to be shale or sandstone. According to the Rb/Sr-Rb/Ba diagram, the sample spots are all located in the sandstone area. It can be concluded that Glassy Meteorites in Guangxi are sourced from sandstone, which have the similar source with the Glassy Meteorite in Australia-Asia distribution area. 4. The composition and trace elements characteristics of Glassy Meteorites in different areas in Guangxi are similar with one in Australia-As