| 裂陷盆地韧性伸展量计算模型及其在渤海湾盆地的应用 |
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| 引用本文： | 关成尧,漆家福,张厚和,吴景富,高剑波,廖宗宝.裂陷盆地韧性伸展量计算模型及其在渤海湾盆地的应用[J].地质科学,2016,0(1):165-176. |
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| 作者姓名： | 关成尧 漆家福 张厚和 吴景富 高剑波 廖宗宝 |
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| 作者单位： | 1. 防灾科技学院地震科学系 河北三河 065201;
2. 中国石油大学(北京)油气资源与探测国家重点实验室 北京 102249;
3. 中国海洋石油研究中心 北京 100027 |
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| 摘 要： | 裂陷盆地在拉张过程中存在的韧性变形一直没有得到理论界的关注。两种常用的伸展量计算方法("地壳厚度变化计算法"和"断层平衡复原法")的巨大差异是由于盆地的韧性伸展分量导致的。本文建立了一套基于以上两种方法耦合应用的盆地韧性伸展量和断层滑移伸展量计算模型,并应用于渤海湾盆地。经计算,渤海湾盆地的韧性伸展量大约占总伸展量的40%左右,这是用"断层平衡复原法"计算的伸展量总是小于"地壳厚度变化计算法"计算的伸展量的真正原因。渤海湾歧口凹陷的伸展计算结果显示韧性变形速率与断层滑移速率呈正比关系,盆地在裂陷期不仅断层滑移剧烈,韧性变形速率也很大。
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| 关 键 词： | 韧性伸展量 计算模型 裂陷盆地 渤海湾盆地 |
| 收稿时间： | 2015-01-08 |
| 修稿时间： | 2015-01-08; |
Ductile extension model of rift basin and its application in Bohai Bay Basin |
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| Guan Chengyao,Qi Jiafu,Zhang Houhe,Wu Jingfu,Gao Jianbo,Liao Zongbao.Ductile extension model of rift basin and its application in Bohai Bay Basin[J].Chinese Journal of Geology,2016,0(1):165-176. |
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| Authors: | Guan Chengyao Qi Jiafu Zhang Houhe Wu Jingfu Gao Jianbo Liao Zongbao |
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| Institution: | 1. Department of Earthquake Science, Institute of Disaster Prevention Science and Technology, Sanhe, Hebei 065201;
2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249;
3. Research Center, CNOOC, Beijing 100027 |
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| Abstract: | The ductile deformation in an extension basin is often ignored by scholars. The huge error of two familiar methods used to calculate the extension amount("fault balance restoration" and "crust thickness change calculation")is due to the plastic deformation amount. This paper will build a model based on two methods that can calculate the "ductile extension amount" and the "fault-slip extension amount" respectively. The model is applied in Bohai Bay Basin. By the calculation, the ductile extension amount is 40% of the total extension amount in Bohai Bay Basin. This is the real reason why the extension amount which comes from the "fault balance restoration" is always less than that comes from the "crust thickness change calculation". The results show that the ductile deformation rate is proportional with the fault-slip rate. In the rifting phase, the fault slipping is severe while the ductile deformation is very fast. |
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| Keywords: | Ductile extension amount Calculation model Rift Basin Bohai Bay Basin |
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