机译:中元古代地层的宇宙球发现及其意义-以北京明十三陵为例
Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China;
National Research Center of Geoanalysis Beijing 100037 China;
Beijing General Research Institute of Mining and Metallurgy Beijing 100044 China;
Faculty of Land Resource Engineering Kunming University of Science and Technology Kunming 650093 Yunnan China;