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2013, 32(3) 531-538 DOI:
ISSN: 1004-5589 CN: 22-1111/P |
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Development characteristics of Jurassic in northeast margin of Qaidam Basin |
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SUN Hong-Jie, LEI Min, WANG Da-Hua, CHAI Xian-Ping, TIAN Lian-Yu, ZHOU Hong-Jian |
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Western New Prospect ��esearch Center of Shengli Oilfield Company��Dongying 257000��Shandong��China |
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Abstract��
Jurassic is the main source rocks of Qaidam Basin��distributed mainly in the northern margin of the basin�� Based on the comprehensive studies of marker beds��lithological features and sedimentary characteristics�� the alluvial fan facies��braided river facies��fan delta facies��braided river delta facies and lacustrine facies are distinguished in Jurassic deposits in the main sections exposed�� Both the facies belt distribution and paleogeographic evolution are closely related to the regional tectonic movement�� There are two evolution stages that include the faulted lake basin sedimentary stage from Early to Middle Jurassic and the depression lake basin sedimentary stage during Late Jurassic��according to the stratigraphic contact relations and sedimentary evolution�� |
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Keywords��
northern Qaidam Basin
Jurassic
sedimentary facies
sedimentary evolution
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Received Revised Online: |
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