抄録
Organic rich black shale around Permian/Triassic boundary from Kinkazan and Guzyo-hachiman area are consistent with typical pelagic sedimentary environment, being dominated by rich in amorphous organic matter, lack of woody material. n-Alkanes isolated from both of the samples maximize at C16, decreasing in relative abundance with increasing carbon number. The pristane/phytane ratios are lower than1. 0. Polycyclic Aromatic Hydrocarbons (PAHs) in black shale dominated by non-alkylated PAHs are thought to be a pyrolytic origin. The total amount of PAHs from Kinkazan and Guzyo-hachiman are 60.0 and 41.6μg/g-dry sample, respectively. It is suggested that there was a large natural fire at Permian/Triassic boundary time.
