| 西天山两侧前陆盆地晚新生代沉积特征及构造意义 |
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| 引用本文： | 王永,李德贵,王彦斌,李建成.西天山两侧前陆盆地晚新生代沉积特征及构造意义[J].新疆地质,2000,18(3):245-251. |
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| 作者姓名： | 王永 李德贵 王彦斌 李建成 |
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| 作者单位： | 1. 中国地质科学院地质研究所,北京,100037
2. 台北中研院地球科学研究所,台湾,台北,南港邮政1-55 |
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| 基金项目： | 国家自然科学基金!（49734230），国土资源部深部地质重点项目!（9501203），国家“305”项目!（96915070 |
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| 摘 要： | 天山两侧前陆盆地晚新生代地层发育，沉积厚度较大。盆地沉积序列的韵律性反映了天山造山带的构造演化历史。晚新生代沉积特征及孢粉组合表明，中新世一上新世一早更新世碎屑岩不稳定组分明显增加，阔叶植物花粉含量减少、耐干地喜早的蒿、藜等显著增加，反映天山活动性增强，上新世晚期天山强烈隆升，天山两侧前陆盆地上新世晚期开始出现磨拉石建造，由于山体隆升造成的大气环流改变，天山两侧盆地封闭性增强，大陆性气候流改变，天
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| 关 键 词： | 西天山 前陆盆地 沉积特征 构造演化 晚新生代 |
| 修稿时间： | 2000-05-20 |
DEPOSITIONAL CHARACTERISTICS OF LATE CENOZOIC AND THEIR TECTONIC SIGNIFICANCE OF FORELAND BASINS AT BOTH SIDES OF TIANSHAN MOUNTAINS IN CHINA |
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| WANG Yong,LEE Teh-quei,WANG Yan-bin,LI Jian-cheng.DEPOSITIONAL CHARACTERISTICS OF LATE CENOZOIC AND THEIR TECTONIC SIGNIFICANCE OF FORELAND BASINS AT BOTH SIDES OF TIANSHAN MOUNTAINS IN CHINA[J].Xinjiang Geology,2000,18(3):245-251. |
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| Authors: | WANG Yong LEE Teh-quei WANG Yan-bin LI Jian-cheng |
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| Abstract: | Late Cenozoic sediments of great thickness are well developed at foreland basins on both sides of the Tianshan range. The rhythmic sedimentary sequences within these basins reflect the tectonic evolutionary history of Tianshan orogen. The sedimentary feature and sporopollen assemblage demonstrate that the elastics of Miocene -Pliocene -early Pleistocene have clearly increasing amount of unstable components and arid artemisia, lamb's -quarters, but less amount of sporopollens of broadieaf plants, indicating a higher activity of the Tianshan range. The rapid uplift of the Tianshan orogen during the late Pliocene led to the occurence of mollase deposits on foreland basins along both sides of the Tianshan mountains. The change of atmospheric circulation due to the oxogenic uplift caused a higher isolation of the basins on both sides of the range. A clear continental climate was so formed, resulted to an obvious climatic change. |
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| Keywords: | Tianshan range foreland basin sedimentary characteristics tectonic evolution |
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