BOUNDARY BETWEEN PERMIAN AND TRIASSIC AND ITS CHARACTERISTICS IN DUWA SECTION OF TARIM BASIN

Abstract

Abstract: Mid-Lower Triassic was found in Duwa section in the south margin of Tarim basin and three sporopollen assemblages were established: ① Alisporites-Luechisporitesvirkkiae-TaeriLaesporites unmtonggouensis-ProtohaploxypiniLS assemblage of Late Permian; ② Kraeuselisporites-Lundbladispora-MinuZosaccus-Taeniaesporites assemblage of Early Triassic; and ③ Minutosaccus-Pnstinuspollenites-7aeniaesporites-Lundbladispora-Retusotriletes assemblage of early Mid Triassic. Break of sporopollen fossil, highly variable chemical element and content of clay minerals and continuity in lithology and sedimentary facies distinguish the Permian - Triassic boundary.

Key words: Permian, Triassic, Stratigraphic division, Sporopollen assemblage, Chemical element, Clay mineral

Yang Pin, Ding Yuechao. BOUNDARY BETWEEN PERMIAN AND TRIASSIC AND ITS CHARACTERISTICS IN DUWA SECTION OF TARIM BASIN[J]. Xinjiang Petroleum Geology, 1996, 17(3): 255-259.

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BOUNDARY BETWEEN PERMIAN AND TRIASSIC AND ITS CHARACTERISTICS IN DUWA SECTION OF TARIM BASIN

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