| 柴达木盆地北缘走滑断层地震剖面解释及形成机理分析 |
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| 关键词:Qaidam basin northern boundary strike slip faults seismic profiles interpretation mechanism |
| 基金项目:中国石油天然气股份有限公司重大专项“柴达木盆地油气勘探开发关键技术研究” |
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| The Seismic Profile Interpretation and Development Mechanism of Strike-slip Faults in Northern Qaidam Basin |
| Located in Qinghai-Tibet Plateau, the Cenozoic Qaidam Basin owes its development to the formation of the plateau, and the complex structures at different sites play an important role in the formation of various interpretations. There are two different opinions concerning the structural styles in northern Qaidam Basin: one is the opinion of overthrust faults which has been somehow overwhelming for many years, and the other is the opinion of strike-slip faults developed in recent years, which however has not been accepted by many researchers. There are two main reasons responsible for such an situation, i.e., regional geological analogy and poor seismic data over the structural belts. Some geologists compare northern boundary tectonics of the Qaidam Basin with southern margin of the Jiuquan Basin located north of the Qilian Mountain. In addition, the seismic data over faulted belts of the Qaidam Basin are usually very insufficient for interpretation. So different well designers have different inclinations in the choice and evaluation of structural traps for drilling. Based on seismic and remote sensing data, the authors interpreted the Lenghu strike-slip fault belt as dextral displacement. However, there existed an inversion of early extensional strike slip in Paleogene period, and the inverted strike slip deformation controlled secondary accumulation of strike slip faults belts. |
| WANG Gui-hong,MA Da-de,ZHOU Chuan-min,ZHOU Su-ping.2011.The Seismic Profile Interpretation and Development Mechanism of Strike-slip Faults in Northern Qaidam Basin[J].Acta Geoscientica Sinica,32(2):204-210. |
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