A PRELIMINARY STUDY ON GRAPTOLITE-BEARING STRATA IN ORDOVICIAN IN WELL TAZHONG 28, TARIM BASIN

Abstract

Abstract: Based on systematic analysis of graptolite fossils from Well Tazhong 28 in Tarim basin, it is considered that geologic time of the graptolite is late period of Middle Ordovician and early period of Late Ordovician, corresponding to middle and late period of Caradoc in western Europe ;graptolite-bearing strata can correlate with strata in Kepin area in northwestern Tarim basin, corresponding to Qilang formation of Middle Ordovician and Yingan formation of Upper Ordovician, respectively.

Key words: Tarim basin, Drilling well, Core, Ordovician, Graptolite, Formation, Geologic time, Biostratigraphic correlation

Zhan Shigao, Zhao Zhixin. A PRELIMINARY STUDY ON GRAPTOLITE-BEARING STRATA IN ORDOVICIAN IN WELL TAZHONG 28, TARIM BASIN[J]. Xinjiang Petroleum Geology, 1998, 19(5): 401-402.

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A PRELIMINARY STUDY ON GRAPTOLITE-BEARING STRATA IN ORDOVICIAN IN WELL TAZHONG 28, TARIM BASIN

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