| 鄂尔多斯盆地早奥陶世沉积特征及其演化 |
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| 引用本文： | 李安仁,刘文均,张锦泉,耿爱琴,郝蜀民.鄂尔多斯盆地早奥陶世沉积特征及其演化[J].成都理工大学学报(自然科学版),1993(1). |
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| 作者姓名： | 李安仁 刘文均 张锦泉 耿爱琴 郝蜀民 |
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| 作者单位： | 成都地质学院
(李安仁，刘文均，张锦泉，耿爱琴)，地矿部第三石油普查队(郝蜀民) |
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| 摘 要： | 鄂尔多斯盆地的早奥陶世沉积可划分为西缘末端变陡的碳酸盐岩缓坡、东缘蒸发-局限台地和南缘镶边碳酸盐岩台地3个沉积区。岩相古地理的发展可划分为3个阶段,即冶理—亮甲山期为稳定的发展阶段,早、晚马家沟期为岩相分异阶段,峰峰期为中奥陶世陆源浊积盆地这一新的发展阶段的前奏。其演化具有东升西降的特点,东部沉积区的沉积相演化为一个向上变浅的沉积序列,而西部为一个向上变深的沉积序列。
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| 关 键 词： | 鄂尔多斯 岩相古地理 碳酸盐缓坡 蒸发-局限碳酸盐岩台地 镶边碳酸盐岩台地 |
SEDIMENTARY CHARACTERISTICS AND EVOLUTION OF EARLY ORDOVICIAN IN ORDOS BASIN |
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| Li Anren Liu Wenjun Zhang Jinquan Geng Aiqin Hao Shuming.SEDIMENTARY CHARACTERISTICS AND EVOLUTION OF EARLY ORDOVICIAN IN ORDOS BASIN[J].Journal of Chengdu University of Technology: Sci & Technol Ed,1993(1). |
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| Authors: | Li Anren Liu Wenjun Zhang Jinquan Geng Aiqin Hao Shuming |
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| Institution: | Li Anren Liu Wenjun Zhang Jinquan Geng Aiqin Hao Shuming |
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| Abstract: | Ordos Basin located at the western margin of Huabei plateform in the early Paleozoic. In this area, depositional environment could be divided into three different divisions during Early Ordovician: a distally steepened carbobnate ramp in western depositional division ;an accretional rimmed carbonate platform in southern depositional division and a evaporite-restricted platform in eastern depositional division. In the evolution of the lithofacies and paleogeography of lower Ordovician in Ordos Basin three stages can be recognized: (1) stable stage (Yeli-Liangjiashan epoch); (2) differentiation stage(early-late Majiagou epoch); (3) early episode of the evolution of deepwater basin with clastic turbidite in Middle Ordovician (Fengfeng epoch). The structural development of the basin is characteried by uplifting in eastern division and descending in western division (upward shallowing sequence in the eastern division, upward deepening sequence in the western division). |
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| Keywords: | Ordos lithofacies and paleogeography carbonate ramp evaporite-restricted platform rimmed carbonate platform |
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