@article{oai:nagoya.repo.nii.ac.jp:00001408,
 author = {Adachi, Mamoru and Suzuki, Kazuhiro},
 journal = {The Journal of earth and planetary sciences, Nagoya University},
 month = {Dec},
 note = {CHIME (Chemical Th-U-total Pb Isochron Method) ages were determined for monazite and zircon grains from Jurassic sandstones in the Nomugi area, central Japan. Many of the monazite grains yield middle Precambrian ages ranging from 1640 to 1450 Ma, but some yield much younger ages of ca. 250 Ma and ca. 180 Ma. The youngest age of ca. 180 Ma constrains that the turbidite sandstone was deposited after the early Jurassic igneous or metamorphic event. This is consistent with the middle Jurassic radiolarian fossils contained in shales below the sandstones. Zircon grains retaining nearly euhedral shape yield middle Ordovician ages of ca. 460 Ma, while rounded purple zircon grains yield middle Precambrian ages of ca. 2000 Ma. The CHIME monazite and zircon ages as well as mineral compositions of sandstones indicate that the clastic materials were derived from a provenance having Precambrian granitoids and metamorphics, and Paleozoic-Mesozoic granitoids and metamorphics., 国立情報学研究所で電子化したコンテンツを使用している。},
 pages = {33--43},
 title = {Precambrian detrital monazites and zircons from Jurassic turbidite sandstones in the Nomugi area, Mino terrane},
 volume = {41},
 year = {1994}
}