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Discovery Of Hiatus In Feixianguan Formation And Its Geological Implications, Sichuan Basin, Sw China, Yang Yu, Xiucheng Tan, Peiyuan Chen, Huiting Yang, Teng Ma, Jian Cao, Xiuju Jin

Turkish Journal of Earth Sciences

The lower Triassic Feixianguan Formation of the Sichuan Basin is an important exploration target for marine natural gas in China. It is widely believed that a certain interval from Fei 1 to Fei 4 displays conformable contacts rather than long-term wide-ranging hiatus. However, 2 denudational interfaces on the top of Member Fei 1 and Fei 2 respectively were found in the present work, which relies on the delicate core observation of 4 cored wells in Puguang Gas Field, microscopic observations of microsamples in terms of thin sections, scanning electron microscopy and cathodoluminescence, and geochemical testing. Evidence indicates that on the …