| 郯庐断裂走滑活动与辽河盆地构造古地理格局 |
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| 引用本文： | 李宏伟,许坤.郯庐断裂走滑活动与辽河盆地构造古地理格局[J].地学前缘,2001,8(4):467-470. |
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| 作者姓名： | 李宏伟 许坤 |
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| 作者单位： | 1. 中国地质大学能源地质系;中国石油辽河油田分公司研究院
2. 中国石油辽河油田分公司研究院 |
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| 摘 要： | 渐新世晚期 ,郯庐断裂的右行走滑活动控制了辽河盆地的构造古地理格局。研究认为 ,岩石圈断块沿郯庐断裂的走滑活动与大型板块构造的活动方式有一定的相似之处 ,即伴随着郯庐断裂的右行走滑 ,从断裂的增压弯曲部位到断裂的释压拉张部位将发生岩石圈断块的汇聚与离散现象 ,由此造成了走滑断裂带上增压弯曲部位与释压拉张部位局部应力场性质的不同 :增压弯曲部位应力相对集中 ,岩石圈断块发生汇聚、挤压、隆升 ;而释压拉张部位由于应力释放 ,岩石圈断块发生离散、伸展、沉降。岩石圈断块的隆升与沉降造成了渐新世晚期辽河盆地构造古地理格局的巨大差异。
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| 关 键 词： | 郯庐断裂 右行走滑 增压弯曲 释压拉张 断块汇聚 断块离散 |
| 文章编号： | 1005-2321(2001)04-0467-04 |
| 修稿时间： | 2001年4月20日 |
THE DEXTRAL STRIKE-SLIP FAULTING OF TAN-LU FAULT ZONE AND THE STRUCTURAL OIL FIELDS DISTRIBUTION IN LIAOHE BASIN |
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| LI Hong-wei ,XU Kun.THE DEXTRAL STRIKE-SLIP FAULTING OF TAN-LU FAULT ZONE AND THE STRUCTURAL OIL FIELDS DISTRIBUTION IN LIAOHE BASIN[J].Earth Science Frontiers,2001,8(4):467-470. |
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| Authors: | LI Hong-wei XU Kun |
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| Institution: | LI Hong-wei 1,2,XU Kun 2 |
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| Abstract: | Liaohe Basin is situated on the Tan\|Lu fault zone. The distribution of oil fields in Liaohe Basin was closely controlled by the dextral strike\|slip faulting of Tan\|Lu fault during the Late Oligocene. More similar to the plate tectonic activity, the fault blocks between the strike\|slip fault plane converge near the constraining bend and diverge near the releasing bend. Therefore, the character of local stress field was different between the constraining bend and the releasing bend. As a result, the stress concentration and the strata compression occurred and the folding structures developed near the constraining bend, while the stress relaxation and the strata extension happened and the syncline developed near the releasing bend. Some other geological phenomena also show that the thrust and the extensional fault, the anticline and the syncline, the geomorphic high area and the geomorphic low area were formed alternatively from the constraining bend to the releasing bend. Mainly governed by these principles, the oil and gas generated from Liaohe Basin migrated mainly from the syncline near the releasing bend to the anticline near the constraining bend during the Late Oligocene. Therefore, anticline traps and the anticline reservoirs were developed along the Tan\|Lu fault zone, and the modern framework of oil and gas distribution in Liaohe Basin was established. |
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| Keywords: | Tan\|Lu fault zone dextral strike slip constraining bend releasing bend fault blocks convergence fault blocks divergence |
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