Mineralogy and Geochemical speciation of phosphorus minerals in early earth spherule beds from Barberton Greenstone Belt

Kazumi Yoshiya1, Shinji Yamamoto2, Yoshio Takahashi1 and Tsuyoshi Komiya3, (1)University of Tokyo, Bunkyo-ku, Japan, (2)Yokohama National University, Yokohama, Japan, (3)University of Tokyo, Department of Earth Science and Astronomy, Tokyo, Japan
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