The Biotic Groups And Stratigraphie Subdivision Of Permian System In A-Chengzhen (Liaocheng Area) Coalfield Of Shandong Province

As part of the North-China Coal Accumulate Area, A'Cheng Town, which locates in the LiaoCheng City, Shandong Province, is one of the most important coal-producing and coal-related industry bases. Though the Stratigraphy Sequence, Sedimentary Environment and Coal-accumulation were studied during and after the A'Cheng Coal Field was discovered, the systematic and comprehensive result about the faunal characteristic and the subdivision and comparison about the coal-bearing strata were absent due to the limitation of the researching method.The subject was aimed at the general study for microfossil and the solution of the strata boundary in the late Paleozoic Coal-bearing strata in the A'Cheng Town, Liaocheng City. The Stratigraphy Sequence will be studied and the boundary between the Permian and Carboniferous will be confirmed in order to correlated with the international usage via the detailed studied of the microfossil, such as the fuslinida, little foraminifer, Conodont, Sporopollen within the Permian System.5 SporopollenCombination were established based on the Sporopollen distribution in the vertical orientation and the content change.Ⅴ Triquitrites — Macrotorispora media Zone;Ⅳ Vitreisporites signatus —Limitisporites rhombicorpus;Ⅲ Knoxisporites instarrotulae — Schopfipollenites plicatus Zone;Ⅱ Gulisporites cochlearius — Sinulatisporites sinensis Zone;I Densosporites anulatus — Thymospora pseudothiessenii ZoneTwo fuslinida Combination Zones were set up within the Taiyuan Fm. Ⅱ Triticites paramontiparus sub-zone; Ⅰ Pseudofusulina sphaeroidea — Ozawainella pulchella sub-zone.Two little foraminifer zones were set up within the Taiyuan Fm.Ⅱ Nodosaria longissima—Geinitzina postcarbanica zone; Ⅰ Glomospira regularis— Palaeotextularia gibbosaeformis zoneAt last, the subject sumed up the fruit in this research.And analysed some question. Finally, we have a expectation for the research, for it's depth and long-range development.