This study focuses on the C and O isotope signature for the rocks from the Permian?Triassic boundary in Guanba area of Qianxi, Guizhou Province. The result reveals that δ13C has a distinct negative drift,and the δ18O drops abruptly. Three layers of tuff,recognized at the boundary,have recorded the volcanic events that occurred in late Permian to early Triassic in this area . The volcanic events led to the abrupt change of sedimentary environments and ultimately triggered the mass extinction during the end of Permian.
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Bin YANG, Fei ZHAO, Bi HE, Ning-Zu WANG, Wen-Bin ZHANG, Zhi-Xi ZHANG, Wei LI. Carbon and oxygen isotope geochemistry of the Permian-Triassic boundary in Guanba area of Qianxi,Guizhou Province, and its significance. Geophysical and Geochemical Exploration, 2018, 42(5): 1081-1088.
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