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Global Geology 2011, 14(4) 221-230 DOI:
ISSN: 1673-9736 CN: 22-1371/P |
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Permian sequence stratigraphy of shallow water basin in Tarim Basin |
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LIU Chensheng1,2，GUO Jianhua1,2 and YIN Qiong1,2 |
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1． Key Laboratory of Nonferrous Metallogentic Prognosis，Ministry of Education，Central South University，Changsha 410083，China; 2． School of Geosciences and Info-physics，Central South University，Changsha 410083，China |
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Abstract：
Based on analysis of drilling，logging and field profile data，six sequence boundaries in Permian are identified in Bachu and Tazhong regions of Tarim Basin． All sequence boundaries are of type I sequence boundaries， and are characterized by down cut． According to the six sequence boundaries，the Permian in this area can be divided into 5 third-order sequences，and all the sequences correspond with classic sequence model of Vail． Sequence Psq4 indicates lake transgressive system tract ( TST) and highstand system tract ( HST) ． Sequences Psq1，Psq2，Psq3，Psq5 indicate low stand system tract ( LST) ，transgressive system tract and highstand system tract． LST is deposited by incised channel infilling with features of fluvial facies． TST is deposited by shore-shallow lake and semi-deep lake． HST is deposited by semi-deep lake，shore-shallow lake and delta． In addition，volcanic rocks are present on the top part of HST in sequence Psq3． Incised channel infilling and deltaic deposits were mainly distributed on western slope of Tadong uplift． |
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Keywords：
Tarim Basin
Permian
sequence stratigraphy
incised channel infilling
deltaic deposit
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Received Revised Online: |
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