| 区域变质岩构造模式 |
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| 引用本文： | 方如恒.区域变质岩构造模式[J].国土资源,1994(Z1). |
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| 作者姓名： | 方如恒 |
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| 作者单位： | 辽宁省地质矿产局 |
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| 摘 要： | 从分析面理的机理人手，在构造变形简单区建立模式，再在构造变形复杂区加以检验与补充，是区域变质岩构造模式建立的途径与依据。基本构造模式为下降阶段的岩石的压扁作用和重结晶作用，流劈理，以及沿ｘ－ｙ面相对位移的晶体变形；上升阶段的沿ｘ－ｙ面发生的顺层剪切劈理，片内褶皱，滑脱型韧性剪切带，拉伸线理与线状构造；压缩阶段的沿ｘ－ｙ面发生褶皱，逆冲型韧性剪切带，逆冲断层，以及破劈理、褶破劈理与折劈理，反映了一个造山带在沉降、隆起和褶皱三个时期的变形规律。沉降与隆起，一次抑多次，关系下降阶段变形和上升阶段变形的次数，区域变质岩构造模式依此有简单型和复杂型两种构造结构。
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| 关 键 词： | 区域变质岩，构造模式，构造结构 |
THE STRUCTURAL MODEL OF REGIONAL METAMORPHIC ROCKS |
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| Fang Ruheng.THE STRUCTURAL MODEL OF REGIONAL METAMORPHIC ROCKS[J].Land & Resources,1994(Z1). |
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| Authors: | Fang Ruheng |
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| Abstract: | The process to build the structural model of regional metamorphic rocks are first toanalysis the mechanism of foliations,second to set up a model in a simple area of structuraldeformation,then to verify and replenish the model in a complex area.The basic structuralmodel shows three stages of deformation in regional metamorphic rocks:(1)in the subsidencestage,there are flattening, recrystallization,flow cleavage,and the crystal deformation rela-tively displacing along x-y plane;(2)in the uprising stage,there are bedding shear cleavage a-long x-y plane,intrafalial folds,decollement-type ductile shear belts,stretching lineation andlinear structures;(3)in the compressional stage,there are folds along x-y plane,thrust-typeductile shear belts, thrust faults,associated with fracture cleavage,foldcrack cleavage andcrenulation cleavage. The three stages of deformation reflect the deformation pattern of anorogenic belt in the three ages of subsidence,upwarping and folding.One time or severaltimes of subsidence or upwarping affect the times of deformation during the subsidence orupwarping stage and decide simple or complex type of structures in the structural model ofregional metamorphic rocks. |
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| Keywords: | Regional metamorphic rocks Structural model Structural texture |
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