Rare earth elements (REE), due to their exclusive physical-and chemical properties in their geochemical and cosmochemical processes, can either migrate as a whole, or show regular variations in their relative abundanc...Rare earth elements (REE), due to their exclusive physical-and chemical properties in their geochemical and cosmochemical processes, can either migrate as a whole, or show regular variations in their relative abundance patterns. Therefore, determinations of REE absolute and relative abundances in meteoritic, lunar and terrestrial materials may, in most cases, shed much light on the chemical composition of the primary materials in the solar nebula, or provide a lot of valuable information on the scale and nature of the geochemical and cosmochemical development of展开更多
文摘Rare earth elements (REE), due to their exclusive physical-and chemical properties in their geochemical and cosmochemical processes, can either migrate as a whole, or show regular variations in their relative abundance patterns. Therefore, determinations of REE absolute and relative abundances in meteoritic, lunar and terrestrial materials may, in most cases, shed much light on the chemical composition of the primary materials in the solar nebula, or provide a lot of valuable information on the scale and nature of the geochemical and cosmochemical development of