| 西藏门巴地区嘉黎断裂带变形特征及演化 |
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| 引用本文： | 胡波,李泊洋,张明,张兰玲.西藏门巴地区嘉黎断裂带变形特征及演化[J].世界地质,2011,30(4):585-592. |
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| 作者姓名： | 胡波 李泊洋 张明 张兰玲 |
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| 作者单位： | 1. 重庆地质矿产研究院，重庆400012; 2. 内蒙古第十矿产勘查开发院，内蒙古赤峰024005; 3. 内蒙古地质调查研究院，呼和浩特010050; 4. 黑龙江工程技术学院，哈尔滨150300 |
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| 基金项目： | 国土资源部地质调查项目（200213000013） |
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| 摘 要： | 地质剖面测量和区域构造解析方法研究表明，嘉黎断裂是一条多期活动并在不同时期显示不同性质的、有着长期发展历史的深大断裂。在晚三叠世-侏罗纪时期，班公湖-怒江洋盆南侧比如弧后盆地发生裂解，此时的嘉黎断裂应是北倾的正断层，控制着弧后盆地的沉积。晚侏罗世-早白垩世时期，伴随着盆地的消亡，出现一系列由南向北的逆冲断裂和蛇绿岩的就位。中新世至第四纪，嘉黎断裂带表现为伸展构造体系，局部出现右旋走滑，形成机理是青藏高原隆升导致构造块体不均匀运动和塌陷所致。
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| 关 键 词： | 嘉黎断裂带 变形特征 演化 西藏门巴 |
Deformation characteristics and evolution of Jiali fault belt in Menba area, Tibet |
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| HU Bo
,
LI Bo-yang
,
ZHANG Ming
,
ZHANG Lan-ling.Deformation characteristics and evolution of Jiali fault belt in Menba area, Tibet[J].World Geology,2011,30(4):585-592. |
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| Authors: | HU Bo LI Bo-yang ZHANG Ming ZHANG Lan-ling |
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| Institution: | 1. Chongqing Institute of Geology ＆ Mineral Resources，Chongqing 400012，China; 2. The Tenth Geophysical Survey Institute of Inner Mongolia，Chifeng 024005，Inner Mongolia，China; 3. Geophysical Survey Institute of Inner Mongolia，Huhehaote 010050，Inner Mongolia，China; 4. Heilongjiang Province Engineering School，Harbin 150300，China |
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| Abstract: | The study on geological profiles survey and structural analysis show that Jiali fault is a long histori- cally deep and large fault with various characteristics at different times. In Late Triassic-Jurassic, the fault belt was the northward dipping normal fault where the Biru back-arc basin on the south of Bangonghu-Nujiang ocean basin cracked, and controlled the sedimentation of the back-arc basin. Accompanied by the disappearance of the basin, a series of thrust faults developed from south to north and the ophiolites intruded during Late Jurassic-Early Creta- ceous. Form Miocene to Quaternary, the Jiali fault redefined as an extensional tectonic system with local dextral strike-slips, and the formation mechanism is the uneven movement and subsidence of tectonic block caused by the uplift of Qinghai-Tibet Plateau. |
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| Keywords: | Jiali fault belt deformation characteristics evolution Menba of Tibet |
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