| 用物理模拟实验研究走滑断裂和拉分盆地 |
| |
| 引用本文： | 周永胜,李建国,王绳祖.用物理模拟实验研究走滑断裂和拉分盆地[J].地质力学学报,2003,9(1):1-13. |
| |
| 作者姓名： | 周永胜 李建国 王绳祖 |
| |
| 作者单位： | 中国地震局地质研究所,中国地震局构造物理开放实验室,北京,100029 |
| |
| 基金项目： | 地震科学联合基金项目(编号:196065),中国地震局地质研究所论著:2002B0023 |
| |
| 摘 要： | 本文按照下地壳和岩石圈地慢塑性流动控制上地壳构造变形的思想,采用脆延性双层模型,在考虑模型相似性的条件下,通过延性层流动驱动脆性层进行走滑断裂和拉分盆地模拟实验。实验结果表明,在左行走滑阶段发育两条“S”型左行右阶断裂带;在右行走滑改造阶段,早期左行右阶断裂带被改造为“Z”型右行右阶断裂带。走滑断裂发育过程中共有三种类型的拉张伸展：(1）“S”型破裂逐渐伸展,形成多个菱形盆地;(2)几个相邻的斜列“S”型断裂在剪切作用下端部被错断连通,形成“地堑-地垒”构造;(3)在右行走滑阶段,沿右行右阶断裂拉张形成拉分盆地。先存的上隆拱张断裂限制了走滑断裂的位置和方向。脆性层强度对走滑断裂的形成和发展具有约束作用,脆性层结构对脆延性的层间捅合作用和走滑断裂特征具有显著影响。
|
| 关 键 词： | 走滑断裂 拉分盆地 塑性流动 物理模拟 下地壳 岩石圈 地幔 层间藕合作用 脆性层 应力场 |
| 文章编号： | 1006-6616(2003)01-0001-13 |
| 收稿时间： | 2001/4/5 0:00:00 |
PHYSICAL EXPERIMENTAS ON STRIKE-SLIP FAULT AND PULL-APART BASIN |
| |
| ZHOU Yong-sheng,LI Jian-guo and WANG Sheng-zu.PHYSICAL EXPERIMENTAS ON STRIKE-SLIP FAULT AND PULL-APART BASIN[J].Journal of Geomechanics,2003,9(1):1-13. |
| |
| Authors: | ZHOU Yong-sheng LI Jian-guo and WANG Sheng-zu |
| |
| Institution: | Institute of Geology, Laboratory of Tectonophysics, CSB, Beijing 100029, China,Institute of Geology, Laboratory of Tectonophysics, CSB, Beijing 100029, China and Institute of Geology, Laboratory of Tectonophysics, CSB, Beijing 100029, China |
| |
| Abstract: | According to the theory that plastic flow of the lower layer (including lower crust and upper mantle lithosphere) controls upper layer (upper crust) deformation in the multi-layer lithosphere, the paper studies the physical experiments of strike-slip fault and pull-apart basin adopted ductile/brittle double-layers model. The experiment results show that strike-slip model developed sinistral right-step fault zone which consisted of a lot of "S"-type faults during sinistral strike-slip stage. The early fault zone was reconstructed and became dextral right-step "Z"-type fault during dextral strike-slip stage.There are three-type extensions in the strike-slip fault zone:(1) a lot of diamond basins formed with stretching of "S"-type fault; (2) the "graben-horst" structure appeared when the ends of adjacent "S"-faults were sheared and connecting; (3) the pull-apart basins formed along right steps of dextral faults during the second strike-slip stage. The stretching faults formed in the stage of uplifting limit the location and the direction of strike-slip faults.Strength of brittle-layer restricts the forming and the development of strike-slip faults, and the texture of brittle-layer influences coupling of brittle-plastic layers and characters of strike-alip faults. |
| |
| Keywords: | strike-slip pull-apart basin plastic flow physical models |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地质力学学报》浏览原始摘要信息 |
| 点击此处可从《地质力学学报》下载免费的PDF全文 |
|
