| 库车坳陷西秋里塔格构造带新生代沉降史分析 |
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| 引用本文： | 万桂梅,汤良杰,金文正.库车坳陷西秋里塔格构造带新生代沉降史分析[J].吉林大学学报(地球科学版),2006(Z1). |
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| 作者姓名： | 万桂梅 汤良杰 金文正 |
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| 作者单位： | [1]中国石油大学盆地与油藏研究中心 [2]中国石油大学盆地与油藏研究中心 北京 [3]中国石油大学石油天然气成藏机理教育部重点实验室 |
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| 基金项目： | 国家自然科学基金项目(40472107、40172076)，国家“973”项目(2005CB422107、G1999043305)，中国石油塔里木油田分公司研究项目(4100405009) |
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| 摘 要： | 根据地震资料和钻井资料,应用PRA公司的BasinMod 1-D软件,利用回剥技术对西秋里塔格构造带的4个井点和邻区的两个井点进行沉降史模拟。模拟结果表明,新生代以来基底总沉降曲线与构造沉降曲线相似,沉降曲线呈上凸式。克拉苏构造带和拜城凹陷的沉降史特征与西秋里塔格构造带的沉降特征总体相似,只是各阶段的沉降速率、沉降量不同,反映了构造运动从北向南传递,沉降中心从北向南迁移的过程。西秋里塔格构造带的沉降特征主要分为5个阶段,这5个阶段的曲线形态由缓到陡,反映了新生代以来西秋里塔格构造带一直处于挤压的应力环境中,且挤压程度由弱到强,直到第四纪最终定型,为典型的前陆盆地沉降特征。亦反映了天山造山过程中,库车冲断褶皱带由北向南推进,并最终到达秋里塔格构造带的过程。
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| 关 键 词： | 库车坳陷 西秋里塔格构造带 沉降史 |
The Analysis of Cenozoic Subsidence History of the Western Qiulitage Tectonic Belt in Kuqa Depression |
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| WAN Gui-mei.The Analysis of Cenozoic Subsidence History of the Western Qiulitage Tectonic Belt in Kuqa Depression[J].Journal of Jilin Unviersity:Earth Science Edition,2006(Z1). |
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| Authors: | WAN Gui-mei |
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| Abstract: | We model the subsidence history of four well points in the western Qiulitage tectonic belt and two well points in the neighbouring areas with the help of the BasinMod 1-D software of Platte River Associates,Inc.and the backstripping technology on the basis of seismic datum and well boring datum.The result suggests that the total subsidence curve of the basement resembles the tectonic subsidence curve since Cenozoic and the subsidence curve presents convex shape.The subsidence history of Kelasu tectonic belt and Baicheng sag is similar to that of the western Qiulitage tectonic belt on the whole.The differences in settling velocity and settling volume reflect that the tectonic movement and subsiding center transfered from north to south.The subsidence history of the western Qiulitage tectonic belt can be divided into five stages from subdued to steep,indicating that the western Qiulitage tectonic belt has always been in the compressional tectonic settings since Cenozoic,and the compression degree was from gentle to strong until Quarternary when finalized the shape.The subsidence character is of typical foreland basin.This also reflect that Kuqa fold and thrust belt has been impelled southward and arrived to Qiulitage tectonic belt in th end during the formation of Tianshan. |
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| Keywords: | Kuqa Depression western Qiulitage tectonic belt subsidence history |
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