| 摘要: |
| 根据褶皱形成的运动学特征,对膝折带迁移、翼部旋转和混合生长3种模式的沉积与抬升关系进行探讨,并针对3种褶皱发育模式提出利用生长地层厚度推测褶皱抬升速率与褶皱过程的方法。研究表明:以膝折带迁移为变形机制的褶皱,发育过程中翼部倾角不变,褶皱顶部与翼部的抬升速率相同,形成翼部平行状生长地层;以翼部旋转为变形机制的褶皱,发育过程中翼部长度不变,沿翼部各点的抬升速率呈线性变化,形成翼部楔状的生长地层;以混合生长为变形机制的褶皱,发育过程中翼长和翼部倾角都发生变化,部分生长地层呈平行状,反映了膝折带迁移的特征,部分生长地层呈楔状,各点的抬升速率仍呈线性变化,反映了翼部旋转的特征。 |
| 关键词: 构造抬升速率 沉积速率 膝折带迁移模式 翼部旋转模式 混合生长模式 |
| DOI： |
| 分类号::P 542.2 |
| 文献标识码:A |
| 基金项目:国家“973”项目(2006CB202301) |
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| Development models of growth fold |
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GUO Wei xing1,2, QI Jia fu1,2, LI Ming gang1, LI Yan you1
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(1.School of Resource and Information Technology in China University of Petroleum, Beijing 102249, China;2.State Key Laboratory of Petroleum Resource and Prospecting in China University of Petroleum, Beijing 102249, China)
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| Abstract: |
| Based on the kinematics characteristics of fold forming, the relationship between sedimentation and uplift of three kinds of models including hinge migration, limb rotation and hinge migration with limb rotation was discussed. According to three kinds of development models of fold, a method was proposed to calculate fold uplift rate and folding process using the thickness of growth strata. The results show that the limb dip angle of fold developed by hinge migration keeps constant, and the fold has the same uplift rate in its crest and limb. And parallel growth strata are formed. The limb length of fold developed by limb rotation keeps constant, and the fold has the different uplift rate in its crest and limb, and the uplift rate changes linearly along the limb. Wedge like geometry growth strata are formed. The limb length and limb dip angle of fold developed by hinge migration with limb rotation change in development. The lower parallel growth strata has the character of hinge migration, while the upper wedge like growth strata has the character of limb rotation. |
| Key words: tectonic uplift rate sedimentation rate hinge migration model limb rotation model hinge migration with limb rotation model |
