| 冯记沟矿区地质构造分析及其意义 |
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| 引用本文： | 于谦.冯记沟矿区地质构造分析及其意义[J].中国煤炭地质,2009(11):13-15. |
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| 作者姓名： | 于谦 |
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| 作者单位： | 宁夏回族自治区煤田地质局,宁夏银川750011 |
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| 摘 要： | 根据冯记沟矿区主要构造的走向、形成期次、平面展布规律，分析了该区应力状态及构造演化，总结了矿区构造特征、地质应力作用与构造赋存规律的关系。认为矿区经受过多期地质构造运动的破坏，整体表现为一系列走向近南北向褶皱群以及与之相伴的断层构造。由于受较强烈的近东西向挤压，总体为一西翼窄、东翼宽缓的不对称背斜构造（尖儿庄背斜），北端翘起、向南倾伏，被断层切割呈“簸箕状”。断裂多表现为高角度逆冲断层。从各种构造的切割关系分析，在东西向主压应力作用下．发育了一系列的近南北向的逆冲断层以及褶皱（矿区北部的尖儿庄背斜、马家滩向斜、冯记沟背斜等），同时还派生了与主压应力相互垂直的右行平移正断层（DF2）及北东向的斜交逆断层（DF3）。
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| 关 键 词： | 构造特征 应力分析 演化过程 冯记沟矿区 |
Geological Structure Analysis in Fengjigou Mine Area |
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| Yu Qian.Geological Structure Analysis in Fengjigou Mine Area[J].Coal Geology of China,2009(11):13-15. |
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| Authors: | Yu Qian |
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| Institution: | Yu Qian (Ningxia Bureau of Coal Geological Exploration, Yinchuan, Ningxia 750011) |
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| Abstract: | According to main structural trend, forming age and horizontal extending pattern in the Fengjigou mine area, analyzed stress state and tectonic evolution, summed up relation between structural features, geological stress and structural hosting pattern in the mine area. Considered that the mine area has experienced disruptions of muhi-stage tectonic movements, on the whole is a series of near NS fold groups and associated faults. Because of near EW compression, en bloc is an asymmetric anticline （Jianerzhuang anticline） with narrow west limb and broad, genre east limb, upwarping north end, plunging south and cut into dustpan shaped by faults. Fractures are mainly high angled reverse thrusts. From cutting relations between varied structures, figured out that a series of near NS reverse thrusts and folds （northern part Jianerzhuang anticline, Majiatan syncline and Fengjigon anticline etc.） were developed under EW main compresgive stress, meanwhile dextral strike-slip normal fault （DF2） perpendicular to main compressive stress and NE oblique reverse fault （DF3） derived. |
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| Keywords: | structural feature stress analysis evolutionary process Fengjigou mine area |
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