Yusuke Sawaki   Takeshi Ohno   Miyuki Tahata   Tsuyoshi Komiya   Takafumi Hirata   Shigenori Maruyama   Brian F. Windley   Jian Han   Degan Shu   Yong Li   
PRECAMBRIAN RESEARCH 176(1-4) 46-64 2010年1月 [査読有り]
The Ediacaran period was one of the most important times for the evolution of life. However, the scarcity of well-preserved outcrops of Ediacaran rocks still leaves ambiguity in decoding ambient surface environmental changes and biological evoluti...
We measured both mass-dependent isotope fractionation of delta Sr-88 (Sr-88/Sr-86) and radiogenic isotopic variation of Sr (Sr-87/Sr-86) for the Neoproterozoic Doushantuo Formation that deposited as a cap carbonate immediately above the Marinoan-r...
We present a method to determine (88)Sr/(86)Sr and (87)Sr/(86)Sr simultaneously. The former variation reflects the mass-dependent isotopic fractionation through the physico-chemical processes, and the latter originates from beta(-)-decay of the pa...
Hiroyuki Matsuzaki   Yasuyuki Muramatsu   Takeshi Ohno   Wei Mao   
EPJ Web of Conferences 153 2017年9月
Iodine-131 distribution released from the Fukushima Dai-ichi Nuclear Power Plant accident was reconstructed through the iodine-129 measurements. From nearly 1,000 surface soil samples iodine was extracted by the pyro hydrolysis method. Extracted i...