[an error occurred while processing this directive] 高校地质学报 2018, 24(1) 77- DOI:     ISSN: 1006-7493 CN: 32-1440/P

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本文关键词相关文章
二连盆地
物理模拟
中生代
伸展构造
控制因素
本文作者相关文章
徐强
徐凤银*
赵岳
赵欣
侯涛
王建新
PubMed
Article by Xu Q
Article by Xu F
Article by Zhao Y
Article by Zhao X
Article by Houtao
Article by Wangjianxin
二连盆地中生代构造变形主控因素:物理模拟与讨论
徐强,徐凤银*,赵岳,赵欣,侯涛,王建新
摘要: 二连盆地是中国东北部中生代含油气盆地,与中国东部中生代裂陷盆地之间存在显著的几何学与运动学相似性,根
据盆内构造线走向和典型地震剖面构造样式可划分为中央正向裂陷带和周缘斜向裂陷带。尽管前人对盆地中生代构造变形
开展了大量研究,但有关同期构造控制因素的认识尚不清晰。为此,研究以二连盆地为原型,设计了3 组分别改变伸展速
率、伸展方向及同沉积作用的平面沙箱模型。实验结果表明伸展方向控制裂陷内部断层特征;南东向的伸展速率改变深层
构造薄弱带的扩展和断裂发育规模;同沉积作用促进基底滑脱层的活动强度,且进一步抑制边界断裂的生长。模拟结果还
揭示了伸展方向是该盆地构造变形的主要控制因素;同沉积作用和伸展速率为次要控制因素。同时根据中国东部及邻区典
型中生代裂陷盆地的几何学与运动学相似性,认为“南东向伸展”可以提供较好的运动学解释。
关键词 二连盆地   物理模拟   中生代   伸展构造   控制因素  
Major Controlling Factors of the Mesozoic Tectonic Deformation in the Erlian Basin: Physical Simulation and Discussion
XU Qiang, XU Fengyin*, ZHAO Yue, ZHAO Xin,HOUTao,WANGJianxin
Abstract: The Erlian Basin is a Mesozoic oil-and gas-bearing basin in northeastern China. There are significant geometric and
kinematic similarities between the Erlian Basin and other Mesozoic rift basins in eastern China. According to the tectonic line of the
basin and the structure observed from the typical seismic profiles, the Erlian Basin consists of a central forward rift zone and peripheral
diagonal rift zones. Although a considerable amount of research has been carried out on the pre-tectonic control of the Mesozoic
deformation of the basin, the contemporaneous tectonic controlling factors remain unclear. In this study, three planar sandbox models
were designed to determine the major controlling factors by changing the extension rate, the extension direction, and the
syn-sedimentation. The results showed that the extensional direction controlled the internal fault characteristics of the rift. The ability
of the extension direction to control the fault characteristics increased with distance from the rift boundary. The rate of extension
changed the expansion of the weak tectonic zone and the scale of fracture development. Larger extension rates could lead to a largerand more complex fracture system. The syn-sedimentary action promoted the activity of the underlying slip-off layer, inhibited the
growth of the boundary fault, and thereby reversely promoted the development of internal secondary fractures. The experimental results
also showed that the extension direction was the major controlling factor of the tectonic deformation of the basin. The syn-sedimentation
and extension rate were the secondary controlling factors. Additionally, according to the geometric and kinematic similarity of typical
Mesozoic rift basins in eastern and adjacent areas of China, the study suggested a “southeastward extension” as a possible kinematic
mechanism for the basin.
Keywords: Erlian Basin   physical simulation   Mesozoic   extensional tectonics   major controlling factors  
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