| 北祁连西段志留纪残留海盆地沉积充填特征及盆地演化动力学分析 |
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| 引用本文： | 冯小刚,范天来,范育新.北祁连西段志留纪残留海盆地沉积充填特征及盆地演化动力学分析[J].甘肃地质学报,2010,19(2):27-31. |
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| 作者姓名： | 冯小刚 范天来 范育新 |
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| 作者单位： | [1]甘肃煤田地质研究所,甘肃兰州730000 [2]甘肃省地矿局第三地勘院,甘肃兰州730050 |
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| 摘 要： | 北祁连西段志留纪残留海盆地形成于加里东构造旋回主造山阶段晚期。早志留—晚志留世沉积充填构成一完整的Ⅰ型沉积层序,盆地充填具典型的双向演化趋势,发育4段式层序结构。沉积盆地充填特征反映了北祁连微洋盆闭合后残留海盆地向前陆盆地演化变迁的过程。本文应用层序地层学的理论成果,结合盆地构造演化特征分析了残留海盆地沉积充填序列类型、地层格架。并依据上述内容对盆地充填模式进行了初步探讨。
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| 关 键 词： | 残留海盆地 Ⅰ型沉积层序 地层格架 盆地充填模式 北祁连西段 |
THE SEDIMENTARY FILLING CHARACTERISTICS OF RESIDUAL OCEANIC BASIN AND KINETIC ANALYSIS OF SILURIAN BASIN EVOLUTION IN WESTERN SECTION OF NORTH QILIAN |
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| CAO Xiao-qin and ZHONG Xin.THE SEDIMENTARY FILLING CHARACTERISTICS OF RESIDUAL OCEANIC BASIN AND KINETIC ANALYSIS OF SILURIAN BASIN EVOLUTION IN WESTERN SECTION OF NORTH QILIAN[J].Acta Geologica Gansu,2010,19(2):27-31. |
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| Authors: | CAO Xiao-qin and ZHONG Xin |
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| Institution: | 1. Gansu Research Institute of Cool Field Geology, Lanzhou 730000, China; 2. No.3 Geology and Mineral Exploration Team, Gansu Provincial Bureau of Geology and Mineral Exploration and Development, Lanzhou 730050, China) |
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| Abstract: | Residual oceanic basin formed in the late stage of Caledonian tectonic cycle orogenic in western section of north Qilian. Early and late Silurian Period depositional filling composes a complete I -type deposi- tional sequence, basin filling has a typical two-way evolutionary trends, and four phases of depositional sequence structure. The depositional basin filling characteristics reflect the north Qilian micro oceanic basin closed, to the foreland basin evolution vicissitude process. Based on the theory of stratigraphy and characteristics of basin struc- ture evolution,it is analyzed residual oceanic basin sedimentary filling sequence type, stratigraphic architecture and filling model of basin. |
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| Keywords: | residual oceanic basin I -type depositional sequence stratigraphic architecture filling model of basin the western section of north Qilian |
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