| 贵州中西部的构造格局与构造应力场 |
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| 引用本文： | 乐光禹,张时俊.贵州中西部的构造格局与构造应力场[J].地质科学,1994,29(1):10-18. |
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| 作者姓名： | 乐光禹 张时俊 |
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| 作者单位： | 成都理工学院地质学系 成都 610059 |
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| 摘 要： | 贵州中西部的基底交叉断裂控制盖层中方向各异的褶皱断裂带,组合为弧形、菱形和三角形等各种构造型式,构成统一的区域构造格局。根据构造组合反演块体在多向侧压力联合作用下的构造应力场,并用有限元法进行数值模拟。此外,还结合对沉积古构造的历史分析,阐明区域动力作用方式的转变。
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| 关 键 词： | 构造组合 断块构造 构造应力场 贵州 |
| 收稿时间： | 1991-09-01 |
| 修稿时间： | 1991-09-01; |
STRUCTURAL DEFORMATION PATTERNS AND TECTONIC STRESS FIELD IN WEST-CENTRAL GUIZHOU |
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| Yue Guangyu,Zhang Shijun,Yang Wunian.STRUCTURAL DEFORMATION PATTERNS AND TECTONIC STRESS FIELD IN WEST-CENTRAL GUIZHOU[J].Chinese Journal of Geology,1994,29(1):10-18. |
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| Authors: | Yue Guangyu Zhang Shijun Yang Wunian |
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| Institution: | Chcngdu institute of Technology, Chengdu 610059 |
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| Abstract: | West-central Guizhou is located in the Upper Yangtze Platform.It was cut intofour fault-blocks by X-type basement faults before the Late Paleozoic.In theLate Paleozoic the platform underwent a violent extensional movement (Emei Taphrogenesis),causing the X-type basement faults to turn into tensile faults.Subsidenceor uplift of the fault-blocks controlled the paleogeographic environments and depositional patterns.A widespread Late Mesozoic compressional movement (Yanshanian Movement)produced a series of folds and thrusts in the area.The association of them shows certain geometric regularity and formed a united regional structural deformation pattern,which consists of"arc-shaped structure","obtuse triangle structure","acute trianglestructure"and"rhombic struture" etc.On the basis of geological analysis,the triangle structural patterns are numerically simulated by means of finite element method and their general characteristicso f stress fields are discussed.The results show that these structural patterns werecontrolled by complicated boundary conditions and caused by two or more systems ofexternal forces which were acting on the blocks at the same time.West-central Guizhou is rich in mineral resources.This paper provides anew theoretical basis for the analysis of structural controls over ore deposits in theregion. |
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| Keywords: | Structural association Fault-block tectonics Tectollic streak field Guizhou |
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