scholarly journals Isotopic ages of Jurassic siliceous shale and Triassic bedded chert in Unuma, Central Japan.

1982 ◽  
Vol 16 (5) ◽  
pp. 213-223 ◽  
Author(s):  
Ken Shibata ◽  
Shinjiro Mizutani
Keyword(s):  
Central Japan ◽  
Bedded Chert ◽  
Siliceous Shale

Clastic rocks in Triassic bedded chert of the Mino terrane, central Japan and the Samarka terrane, Sikhote-Alin, Russia

Stratigraphy ◽  
2020 ◽  
pp. 181-188
Author(s):  
Satoru Kojima ◽  
Kazuhiro Sugiyama ◽  
Igor' V. Kemkin ◽  
Alexander I. Khanchuk ◽  
Shinjiro Mizutani
Keyword(s):  
Sikhote Alin ◽  
Central Japan ◽  
Clastic Rocks ◽  
Bedded Chert

scholarly journals Isotopic ages of siliceous shale from Hida-Kanayama, central Japan.

1980 ◽  
Vol 14 (5) ◽  
pp. 235-241 ◽  
Author(s):  
Ken Shibata ◽  
Shinjiro Mizutani
Keyword(s):  
Central Japan ◽  
Siliceous Shale

scholarly journals Clastic rocks in Triassic bedded chert in the Mino terrane, central Japan: their petrographic properties and radiolarian ages.

1999 ◽  
Vol 105 (6) ◽  
pp. 421-434 ◽  
Author(s):  
Satoru Kojima ◽  
Hideyuki Ando ◽  
Masahiro Kida ◽  
Shinjiro Mizutani ◽  
Yuko Sakata ◽  
...  
Keyword(s):  
Central Japan ◽  
Clastic Rocks ◽  
Bedded Chert

scholarly journals SIMS analysis of Si isotope for radiolarian test in Mesozoic bedded chert, Inuyama, central Japan

2020 ◽  
Vol 71 (4) ◽  
pp. 331-353 ◽  
Author(s):  
Maximilien BÔLE ◽  
Masayuki IKEDA ◽  
Peter O. BAUMGARTNER ◽  
S. Rie HORI ◽  
Anne-Sophie BOUVIER
Keyword(s):  
Central Japan ◽  
Bedded Chert ◽  
Sims Analysis ◽  
Si Isotope

scholarly journals SIMS Analysis of Si Isotope for Radiolarian Test in Mesozoic Bedded Chert, Inuyama, Central Japan

2020 ◽  
Author(s):  
Maximilien Bôle ◽  
Masayuki Ikeda ◽  
Peter O. Baumgartner ◽  
Rie S. Hori ◽  
Anne-Sophie Bouvier
Keyword(s):  
Central Japan ◽  
Bedded Chert ◽  
Sims Analysis ◽  
Si Isotope

scholarly journals Biotic and environmental changes in the Panthalassa Ocean across the Norian (Late Triassic) impact event

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Honami Sato ◽  
Yutaro Takaya ◽  
Kazutaka Yasukawa ◽  
Koichiro Fujinaga ◽  
Tetsuji Onoue ◽  
...  
Keyword(s):  
Chemical Weathering ◽  
Environmental Changes ◽  
Upper Triassic ◽  
Late Triassic ◽  
Time Interval ◽  
Impact Event ◽  
Central Japan ◽  
Burial Flux ◽  
Bedded Chert ◽  
The Impact

Abstract Stratigraphic records of impact ejecta preserved in a pelagic deep-sea setting occur within Upper Triassic successions of the subduction-generated accretionary complexes of central Japan. A significant biotic turnover in radiolarians occurred during the ~ 300 kyr time interval after the impact event, which is characterized by a remarkable reduction in the burial flux of radiolarian silica. However, the nature of the environmental conditions at this time remains unclear. To investigate the environmental changes that triggered a decline in radiolarian burial flux after the impact event, geochemical proxies (major, trace, and rare earth elements) were applied to the middle–upper Norian (Upper Triassic) bedded chert succession of the Mino Belt, central Japan. A progressive environmental deterioration is evident from (1) a post-impact shutdown of burial flux of primary and silica- and apatite-secreting organisms; and (2) a subsequent abrupt increase in chemical weathering associated with a sustained reduction in the burial flux of radiolarian silica. No significant redox changes were observed across the impact event. The continental weathering proxies suggest a transient increase in weathering intensity occurred during the decline of radiolarian burial flux, likely in response to a short-term warm and humid period. Our results delineate a remarkable record of progressive environmental changes in the Panthalassa Ocean after this large impact event.

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