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2006•Xinjiang GeologyRequires access

THE RESEARCH ON SEDIMENTATION FEATRUES IN S CAMBRIAN-ORDOVICIAN SEQUENCE FRAME IN THE CENTER OF TARIM

Tang Da-qing

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Abstract

According to division and comparison of sequence stratigraphy, the Cambrian～Ordovician in the center of Tarim can be divided into 8 super sequences in which 3 super sequences are in Cambrian, 5 are in Ordovician (2 in lower Ordovician, 3 in middle-upper Ordovician). The sedimentary facies of Cambrian～Ordovician system has typical zonation structure. The sedimentary facies evolved to margin of mesa and shelf facies gradually from evaporated platform, restricted platform, and open platform from bottom to top, which reflects ocean water deepening upward.

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What this paper is about

According to division and comparison of sequence stratigraphy, the Cambrian～Ordovician in the center of Tarim can be divided into 8 super sequences in which 3 super sequences are in Cambrian, 5 are in Ordovician (2 in lower Ordovician, 3 in middle-upper Ordovician). The sedimentary facies of Cambrian～Ordovician system has typical zonation structure. The sedimentary facies evolved to margin of mesa and shelf facies gradually from evaporated platform, restricted platform, and open platform from bottom to top, which reflects ocean water deepening upward.

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Available abstract

According to division and comparison of sequence stratigraphy, the Cambrian～Ordovician in the center of Tarim can be divided into 8 super sequences in which 3 super sequences are in Cambrian, 5 are in Ordovician (2 in lower Ordovician, 3 in middle-upper Ordovician). The sedimentary facies of Cambrian～Ordovician system has typical zonation structure. The sedimentary facies evolved to margin of mesa and shelf facies gradually from evaporated platform, restricted platform, and open platform from bottom to top, which reflects ocean water deepening upward.

Key concepts: Ordovician, Geology, Facies, Paleontology, Sequence (biology), Sequence stratigraphy, Tarim basin, Paleozoic

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