| 东北地区拉布达林盆地的构造特征及早白垩世变形序列 |
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| 关键词:structural feature deformation sequence extensional structure inversion structure Labudalin Basin |
| 基金项目:国家油气选区专项(编号:XQ—2004—07) |
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| Structural Features and Lower Cretaceous Deformation Sequence of Labudalin Basin in Northeast China |
| The Labudalin basin is a Mesozoic unsymmetrical fault depression basin located in the Paleozoic orogenic belt in Inner Mongolia-Da Hinggan Ling area.The Lower Cretaceous and Quaternary depositional systems are well developed in the basin.Structural features of Labudalin basin are very complex.There are three groups of structures in NE direction,NEE direction and NW direction,respectively.The NE-trending structures are mainly a series of listric normal faults and associated normal faults in the same direction.The NEE-trending structures are shear-normal faults.The NE-and NEE-trending faults were formed in the same stress field during the depositional periods of Tamulangou Formation-Yiliekede Formation and have different characteristics.The NW-trending faults are late sinistral strike-slip normal faults cutting the NE-and NEE-trending faults.The Labudalin basin experienced three times of deformation during the Lower Cretaceous:① The NW-NE extension from the Tamulangou Formation depositional period to the Yiliekede Formation depositional period;② The NW-NE compression in the Damoguaihe Formation depositional period;③ The nearly EW extension in the Yimin Formation depositional period. |
| LIU Hong-zhi,ZHU De-feng,WU Xiang-mei,YANG Jian-guo,LIN Dong-cheng,LI Xiao-hai.2008.Structural Features and Lower Cretaceous Deformation Sequence of Labudalin Basin in Northeast China[J].Acta Geoscientica Sinica,29(4):427-433. |
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