| 新疆叶城晚新生代山前盆地演化与高原北缘的隆升—Ⅰ地层学与岩石学证据 |
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| 引用本文： | 郑洪波 KatherineButcher 等.新疆叶城晚新生代山前盆地演化与高原北缘的隆升—Ⅰ地层学与岩石学证据[J].沉积学报,2002,20(2):274-281. |
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| 作者姓名： | 郑洪波 KatherineButcher |
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| 作者单位： | 同济大学海洋地质实验室,上海200092 |
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| 基金项目： | 中国科学院"百人计划",国家自然科学基金,教育部"长江学者"计划,教育部长江特聘教授计划项目,,40025107,,,,,, |
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| 摘 要： | 叶城晚新生代山前盆地的岩性主要由中新世的细粒泥岩和砂岩（乌恰群）,上新世的砂岩夹薄层砾岩（阿图什组）及上新世－更新世的粗粒砾岩（西域组）构成。中新世的沉积以细颗粒泥砂岩为主,表明物源区较远,古流域坡度较小,搬运距离较长。古流向分析显示物源区位于南和偏南方,此时昆仑山的地势起伏尚不大。到上新世的阿图什组沉积时,开始出现砾石沉积,反映西昆仑山已经开始有规模地隆升。西域砾岩的沉积标志着作为物源区的西昆仑山民有相当的高度,随着山系的隆升,基底岩石被暴露和剥蚀。
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| 关 键 词： | 新疆 晚新生代 盆地演化 隆升 地层学 高原 岩石地层 磁性地层 砂岩 |
| 文章编号： | 1000-0550(2002)02-0274-08 |
| 修稿时间： | 2001年4月28日 |
Evolution of Neogene Foreland Basin in Yecheng, Xinjiang, and Uplift of Northern Tibetan Plateau --I Stratigraphy and Petrology |
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| ZHENG Hong-bo , BUTCHER Katherine POWELL Chris.Evolution of Neogene Foreland Basin in Yecheng, Xinjiang, and Uplift of Northern Tibetan Plateau --I Stratigraphy and Petrology[J].Acta Sedimentologica Sinica,2002,20(2):274-281. |
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| Authors: | ZHENG Hong-bo BUTCHER Katherine POWELL Chris |
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| Institution: | ZHENG Hong-bo~ 1,2 BUTCHER Katherine~3 POWELL Chris~3 1 |
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| Abstract: | Late Ceinozoic forland basin deposits in Yecheng are composed of Miocene mudstone and sandstone (Wuqia Group), Early Pliocene sandstone with minor gritstone (Artux Formation) and Late Pliocene-Early Pleistocene conglomerate (Xiyu Formation). The Miocene strata are dominated by fine-grained clastic material, indicating a distal source and low gradient slope. Palaeocurrent measurements suggested northward direction, indicating that the Kunlun area was at low elevation. Deposition of Artux Formation marked the first appearance of gravel and lithic detritus, indicating the uplift of the Kunlun. Xiyu Formation is characterized by coarse debris flow deposits, marking the strong uplift of the northern part of Tibetan Plateau and unroofing of the Kunlun. |
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| Keywords: | late Ceinozoic stratigraphy Tibetan Plateau Yecheng |
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