| 断层调整与控制作用下的叠加构造变形:以贵州地区燕山期构造为例 |
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| 引用本文： | 杨坤光,李学刚,戴传固,张慧,周琦.断层调整与控制作用下的叠加构造变形:以贵州地区燕山期构造为例[J].地质科技情报,2012(5):50-56. |
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| 作者姓名： | 杨坤光 李学刚 戴传固 张慧 周琦 |
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| 作者单位： | 中国地质大学构造与油气资源教育部重点实验室;中国地质大学地球科学学院;贵州省地质调查研究院;贵州省地质矿产勘查开发局 |
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| 基金项目： | 贵州省国土资源厅项目“贵州区域构造特征、构造演化与矿产空间分布关系研究”;国家自然科学基金项目(40972137) |
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| 摘 要： | 褶皱叠加方式与其形成的构造现象极为复杂。常见3种叠加方式为共轴叠加、横跨叠加和斜跨叠加。如果地质体均一,断层不发育,即会形成理想型叠加褶皱的构造样式。如果发育区域性大型断层,在不同方向的区域应力场作用下,加上地质体的不均一,就会在不同的区块内形成更为复杂的叠加褶皱与构造组合。贵州境内自古生代-中生代先后发育了5条切割基底的区域性断裂,至早中中生代,这些断层将区内切割为6个主要构造块体。在三叠纪之后的燕山构造运动期间,发生了强烈的构造叠加变形,早燕山期与晚燕山期区域应力场方向不同,使得不同区域断层的性质、位移发生变化,断层的多次活动起到了应力释放与调整作用,再加上块体地质结构的不均一性与软弱层的滑脱作用,最终在不同区块内发生了不同的褶皱叠加作用,形成了不同的褶皱构造样式与构造组合。
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| 关 键 词： | 叠加褶皱作用 断层调整 构造运动 贵州 |
Superimposition Deformation Controlled and Adjusted by Faults:An Example from Yanshanian Structural Deformation in Guizhou Province |
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| YANG Kun-guang,a,b,LI Xue-gang,b,DAI Chuan-gu,ZHANG Hui,ZHOU Qi.Superimposition Deformation Controlled and Adjusted by Faults:An Example from Yanshanian Structural Deformation in Guizhou Province[J].Geological Science and Technology Information,2012(5):50-56. |
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| Authors: | YANG Kun-guang a b LI Xue-gang b DAI Chuan-gu ZHANG Hui ZHOU Qi |
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| Institution: | 1a.Key Laboratory of Tectonic and Petroleum Resources of Ministry of Education; 1b.Faculty of Earth Sciences,China University of Geosciences,Wuhan 430074,China; 2.Guizhou Academy of Geological Surveying,Guiyang 550005,China; 3.Guizhou Bureau of Geology and Mineral Exploration & Development,Guiyang 550004,China) |
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| Abstract: | Folds superimposition pattern and associated structural formation are extremely complex.However,there are three kinds of familiar fold superimposition patterns:perpendicular intersection,inclined intersection and in parallel.The ideal tectonic styles of superimposed folds will form if the geological background is uniform and the fault is not developed,otherwise,more complex superimposed folds and structural assemblages will form in different blocks divided by regional large faults in different directions regional stress field.In Guizhou Province,five regional faults cutting basement have developed from Paleozoic to Mesozoic,by early to middle Mesozoic,the whole province was divided into six major tectonic blocks by these regional faults.Intense tectonic superimposed deformation has occurred during Yanshanian,regional faults whose displacement and nature will change from early to late Yanshanian because of different regional stress field directions have played stress release and adjustment role during several movements.At the same time,geological structure of different blocks are heterogeneous and weak layer will perform detachment effect.Ultimately,different blocks will undergo various folds superimposition and form different styles of fold structure and tectonic assemblages. |
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| Keywords: | folds superimposition fault adjustment structural movement Guizhou Province |
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