| 塔里木盆地北部库车坳陷白垩系沉积古地理 |
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| 引用本文： | 肖建新,林畅松,刘景彦.塔里木盆地北部库车坳陷白垩系沉积古地理[J].现代地质,2005,19(2):253-260. |
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| 作者姓名： | 肖建新 林畅松 刘景彦 |
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| 作者单位： | 中国地质大学,能源学院,北京,100083 |
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| 基金项目： | 国家基础研究发展规划项目 (G1999043304)。 |
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| 摘 要： | 将库车坳陷内白垩系层序地层的划分、体系域沉积相的组成和分布特征与坳陷内及其周围的构造环境结合起来,从宏观构造背景上分析了层序和沉积相带的展布特征与发育规律。白垩系库车坳陷的前陆构造演化具有阶段性, 控制了坳陷在不同阶段的沉积古地理的发育特征。亚格列木期和舒善河早期, 库车坳陷的沉积古地理南北分带明显, 具有南北双向提供物源的特征, 粗碎屑分布在坳陷较陡的北侧。舒善河后期与巴西盖期, 塔北隆起大部分已沉降至水下,至巴什基奇克期被同期高水位体系域沉积地层所超覆。代表特大型气田的克拉2井的主要储层就位于巴什基奇克期辫状河三角洲相带, 其分布稳定而广泛, 被称为“辫状河—三角洲砂体裙”。
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| 关 键 词： | 白垩系 沉积古地理 库车坳陷 前陆盆地 |
| 文章编号： | 1000-8527(2005)02-0253-08 |
| 修稿时间： | 2005年1月10日 |
Depositional Palaeogeography of Cretaceous of Kuqa Depression in Northern Tarim Basin |
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| XIAO Jian-xin,LIN Chang-song,LIU Jing-yan.Depositional Palaeogeography of Cretaceous of Kuqa Depression in Northern Tarim Basin[J].Geoscience——Journal of Graduate School,China University of Geosciences,2005,19(2):253-260. |
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| Authors: | XIAO Jian-xin LIN Chang-song LIU Jing-yan |
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| Abstract: | The distribution patterns of environments and facies in different stages of Cretaceous (Lower Cretaceous) in Kuqa depression are discussed from point of view of depositional palaeogeography in this paper. The division of sequence stratigraphy , the system tracts and sedimentary facies distributions are linked up with the structural environments inside and around the depression. The structural evolution of foreland basin of Kuqa depression in Cretaceous has its phases, which control the characteristics of depositional palaeogeography development in the depression in different stages The depositional palaeogeographies of Yageliemu stage and early Shushanhe stage have a clear zonation from north to south and show characteristics of accepting the sediments from both the north and south of source areas,having the coarse detritus in the northern abrupt slope of the depression The most part of Tabei Uplift had subsided under water at the stages of later Shushanhe and Baxigai, and was overlapped by the highstand system tract at Bashenjiqike stage The major reservoir horizons of the large scale of gas field Kela 2 are located in the facies zone of the braided delta at the Bashenjiqike stage, which have a stable and wide distribution called as the “sandy body apron of braided delta” |
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| Keywords: | Cretaceous depositional palaeogeography Kuqa depression foreland basin |
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