To understand the elemental occurrence phases in the new-type ferromanganese crusts from the East Philippine Sea,chemical extraction method has been utilized to analyze the occurrence phases in three crusts.The occurrence phases of metallic elements and rare earth element(REE)in different types of crusts are coherent as a whole,indicating that they were formed in similar geologic and oceanic conditions.Among the metallic elements,Fe and Cu mainly concentrate in the residual phase,while Mn,Co and Ni mainly c...
【基金】
国家自然科学基金重点项目(No.90411014);
国家重点基础研究与发展计划项目(No.2007CB815903);
国家自然科学基金面上项目(Nos.40576032,40506016);
the Brain Korea 21 Program(Modern Sedimentation on Yellowand East China Seas)of Korea