U-Pb Geochronology from five volcanic tuffs from the Yezo Group, Hokkaido, Japan

Abstract: The dataset contains 206Pb/238U zircon CA-ID-TIMS dates from five volcanic tuffs from the Yezo Group, Hokkaido, Japan. The data underpin an age model developed for a proto-Pacific seawater 187Os/188Os spanning the Cenomanian-Turonian boundary interval, and Ocean Anoxic Event 2. The resulting age model supports the integration of the Pacific 187Os/188Os dataset with similar records from the Western Interior Seaway.

Other Description: Du Vivier, A.D.C., Selby, D., Condon, D.J.C., Takashima, R., Nishi, H.,(2015),"Pacific 187Os/188Os isotope chemistry and U–Pb geochronology: Synchroneity of global Os isotope change across OAE 2." Earth and Planetary Science Letters, 428:206-214.