ABSTRACT

By using tholeiitic basalt as a starting material, partitioning of REE, Ba and Sr between crystal phase and liquid phase was investigated at 20kb. In this investigation, the crystal phase composed overwhelmingly of clinopyroxene was separated with heavy medium and dealt with as a whole. According to the results of three runs, the concentration ratios of REE between the crystal and liquid phases exhibit features strictly similar to those of a partition coefficient function deduced by mathematical analysis of the chondrite-normalized REE patterns of some bulk rock samples with basaltic chemical compositions.