| Deformation Characters of the Maowen Fault Belt in Longmenshan, Western Sichuan |
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| 作者姓名： | TANG Zemin ZHANG Yueqiao YANG Nong . Institute of Geology Chinese Academy of Geological Sciences . . Institute of Geomechanics Chinese Academy of Geological Sciences |
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| 作者单位： | TANG Zemin1，ZHANG Yueqiao2，YANG Nong2 1. Institute of Geology，Chinese Academy of Geological Sciences，100037. 2. Institute of Geomechanics，Chinese Academy of Geological Sciences，100081 |
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| 摘 要： | 1. Introduction The Longmenshan orogenic belt is a typical intercontinental orogenic belt (Fig. 1), from NW to SE composed of Paleozoic epimetamorphic rock systems, Protozoic intermediate-acid intrusions and metamorphic rocks (called Pengguan Complex), Upper Triassic sandshales, and Paleozoic glided nappe as well as Jurassic-Tertiary molass formation,. The Maowen fault belt is a boundary fault belt between the Longmenshan orogenic belt and Songpan-Garze fold belt. It starts from Shenx…
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Deformation Characters of the Maowen Fault Belt in Longmenshan, Western Sichuan |
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| TANG Zemin,ZHANG Yueqiao,YANG Nong . Institute of Geology,Chinese Academy of Geological Sciences,. . Institute of Geomechanics,Chinese Academy of Geological Sciences,.Deformation Characters of the Maowen Fault Belt in Longmenshan, Western Sichuan[J].大陆动力学(英文版),2001(1). |
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| Authors: | TANG Zemin ZHANG Yueqiao YANG Nong |
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| Institution: | TANG Zemin1,ZHANG Yueqiao2,YANG Nong2 1. Institute of Geology,Chinese Academy of Geological Sciences,100037. 2. Institute of Geomechanics,Chinese Academy of Geological Sciences,100081 |
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| Abstract: | The Maowen fault belt is one of important fault belts of the intercontinental orogenic belt of Longmenshan, mainly experienced three stage deformation; they are ductile shearing of thrust napping, brittle thrust napping and sinstral strike-slipping. Although Sc strike of mylonite formed by ductile shearing in early stage was reformed by later two stage brittle deformation, and changed greatly along the strike and inclination, the shear zone, as a whole, strikes NE and inclines NW. The stretching lineation is parallel or nearly parallel to the inclination of the ductile shear zone. According to the development of conjugated joints, the main compressive stress of the two stage brittle deformation is oriented to 306 and 2, respectively |
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| Keywords: | Maoen fault belt ductile shear brittle deformation Longmenshan western Sichuan |
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