| 龙门山陆内俯冲带形成机制探讨 |
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| 引用本文： | 刘顺.龙门山陆内俯冲带形成机制探讨[J].矿物岩石,1998(Z1). |
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| 作者姓名： | 刘顺 |
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| 作者单位： | 成都理工学院地质学系 |
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| 摘 要： | 本文分析了龙门山陆内俯冲带两侧岩石圈的强度结构特征及在侧向力作用下所发生的变形过程。盆地岩石圈中高强度层厚而紧凑，显示了较好的整体高强度性；造山带岩石圈上地壳具高强度，其下为低强度层。在侧向挤压力的作用下，变形主要发生于造山带一侧，最可能的变形方式是其脆性上地壳出现倾向后陆的逆冲断层，盆地岩石圈沿此断层俯冲，挤压其下部的低强度层，使之发生韧性增厚变形。
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| 关 键 词： | 龙门山 陆内俯冲带 俯冲机制 岩石圈强度 |
SUBDUCTION MECHANISM OF INTRACONTINENTAL SUBDUCTION ZONE FROM THE LONGMENSHAN AREA |
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| Liu Shun.SUBDUCTION MECHANISM OF INTRACONTINENTAL SUBDUCTION ZONE FROM THE LONGMENSHAN AREA[J].Journal of Mineralogy and Petrology,1998(Z1). |
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| Authors: | Liu Shun |
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| Abstract: | The strength structure of both Sichuan basin lithosphere(SBL)and Longmenshan lithosphere(LL) along of Longmenshan intracotinental subduction zone and the deformation process of the lithospheres under lateral pressure are analysed.SBL is composed of thick and close coupled high strength layers,i.e., with high total strength.LL has a high strength layer in the upper crust and below it there is a low strength layers .When they push each other,deformation occurs mainly in LL.The most possible deformation pattern is that,the hinter dipping thrusts take place in LL while SBL subducts along the thrusts and pushes the lower low strength layers of LL, plastical thickening. |
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| Keywords: | Longmenshan intracontinental subduction zone mechanism of subduction strength of lithosphere |
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