| 渤海湾盆地张巨河复杂断块区平面砂箱模拟实验及其启示 |
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| 引用本文： | 童亨茂.渤海湾盆地张巨河复杂断块区平面砂箱模拟实验及其启示[J].地质论评,2003,49(3):305-310. |
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| 作者姓名： | 童亨茂 |
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| 作者单位： | 石油大学石油与天然气成藏机理教育部重点实验室,北京,102200;中国矿业大学资源与安全学院,北京,100083 |
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| 基金项目： | 石油天然气总公司重点基础地质实验室建设项目 |
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| 摘 要： | 伸展盆地复杂断块区往往发育多个方向的断层，这种复杂的正断层组合过去有人认为是多期构造矗加作用的结果。本文针对渤海湾盆地张巨河复杂断块区进行了平面砂箱模拟实验。实验结果表明，在基底有先存构造(如基底断裂)的情况下，如果区域伸展方向和先存断裂或基底构造活动(底辟上拱)不协调，通过递进变形就可以形成复杂的断层组合，即复杂的断层组合可以在一个伸展构造期内、在统一的区域伸展构造力作用下在递进变形过程中逐渐形成，复杂断层组合并不一定需要多期变形叠加。在此基础上，结合理论分析，提出了复杂断层组合成因的另一种模式——不协调伸展递进变形模式。该模式为揭示伸展构造系统中复杂断层组合之间的内在联系提供了新的思路。
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| 关 键 词： | 渤海湾盆地 伸展盆地 断层 伸展构造 砂箱模拟实验 基底 构造叠加作用 |
Plane Sandbox Modeling of the Complicated Zhangjuhe Faulted Block and Its Implication,the Bohai Bay Basin |
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| TONG Hengmao Key laboratory for hydrocarbon accumulation mechanism,Ministry of Education,University of Petroleum,Beijing, Source and safety school,China University of Mining Technology,Beijing.Plane Sandbox Modeling of the Complicated Zhangjuhe Faulted Block and Its Implication,the Bohai Bay Basin[J].Geological Review,2003,49(3):305-310. |
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| Authors: | TONG Hengmao Key laboratory for hydrocarbon accumulation mechanism Ministry of Education University of Petroleum Beijing Source and safety school China University of Mining Technology Beijing |
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| Abstract: | There are many faults with different trends in complicated fault blocks in an extensional basin, and the fault assemblages are very complex. Such complicated fault assemblages are usually thought to be the result of superposition tectonic events of multiple stages in the past. However, according to the objective sandbox modeling of the complicated Zhangjuhe faulted block, the author found that complicated fault assemblages can be formed by means of progressive deformation due to unchanged tectonic forces. Based on the experimental results in combination with theoretical analysis, a new genetic model of complicated fault assemblages??the disharmonic extension-progressive deformation model is proposed, which describes complicated structures with simple origins. This model shows that preexisting structures, such as faults in basement, and basement movement have a key effect on the deformation of basin covers. When the regional extension is disharmonic with the basement structure and movement, complicated fault assemblages can be form during progressive deformation. This model provides a new idea for revealing the internal relationships of complicated fault assemblages in an extensional tectonic system. |
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| Keywords: | complicated fault assemblages sandbox modeling extensional basin progressive deformation disharmonic extension |
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