Key new pieces to the HIMU (high U/Pb) puzzle from olivines and diamond inclusions (South Pacific and Indian Ocean)

High-precision EMP analyses on olivine phenocrysts in HIMU (high U/Pb) lavas from Mangaia and Tubuai in the Cook-Austral Islands, South Pacific, and in lavas from Karthala, Grande Comore Island, Indian Ocean, which shows intermediate Nd-Sr-Pb isotope ratios between the HIMU and EM1 (enriched mantle) mantle end-members.

对来自南太平洋库克-澳大利亚群岛马纳亚和图布艾岛以及印度洋大科摩罗岛卡特拉拉的HIMU（高U/Pb）熔岩中的橄榄石斑晶进行的高精度EMP分析，揭示了HIMU与EM1（富集地幔）地幔端元之间的中间值Nd-Sr-Pb同位素比率。