| 摘要: |
| 酒西白垩纪盆地是酒西含油气盆地的一个单型盆地,发育了冲积扇、水下重力流扇、扇三角洲、湖泊、河流沉积体系。在湖盆演化的不同阶段形成冲积扇-扇三角洲-滨浅湖-砾质辫状河、近岸水下重力流扇-中深湖-扇三角洲和扇三角洲-中浅湖-河流沉积体系组合型式。依据等时界面,将湖盆充填序列划分为3个构造层序,相对应于初始裂陷、扩张裂陷-热衰减沉降和湖盆萎缩关闭3个演化阶段。地幔热柱的形成和衰减、燕山运动等远程应力作用控制着盆地的演化。 |
| 关键词: 沉积构成 盆地动力学 白垩纪 酒西盆地 甘肃 |
| DOI： |
| 附件 |
| 投稿时间：2002-12-28 |
| 基金项目: |
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| The depositional architectures and geodynamics of the West Jiuquan basin, Gansu |
| FU Guo-min, LI Yong-jun, LIANG Zhi-lu |
(1. Chengdu University of Technology, Chengdu 610059, Sichuan, China;
2. Chang'an University, Xi'an 710050, Shaanxi, China;
3. Gansu Bureau of Geology and Mineral Resources, Lanzhou 730000, Gansu, China) |
| Abstract: |
| The West Jiuquan Cretaceous basin, a monotypic petroliferous basin in Gansu is composed of alluvial fan, subaqueous gravity flow fan, fan delta, lake, fluvial depositional systems. The depositional system associations such as alluvial fan-fan delta-littoral-to shallow-lake-gravelly braided river, nearshore subaqueous gravity flow fan-moderate to deep lake-fan delta, and fan delta-moderate to shallow lake-fluvial associations record the distinctive phases of the basin evolution. The infilling sequences of the basin may be divided, in the light of isochrous surfaces, into three tectonic sequences corresponding to the initial rifting, extension and subsidence-thermal subsidence, and basin collapse and closure phases. The evolution of the basin is controlled by the distal stresses such as the waxing and waning of the mantle thermal plumes and Yanshanian movement. |
| Key words: depositional architecture basin dynamics Cretaceous West Jiuquan Basin Gansu |
