| 临湘干港晏家金矿区构造变形特征研究 |
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| 引用本文： | 李晨光.临湘干港晏家金矿区构造变形特征研究[J].湖南地质,2001,20(2):85-88. |
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| 作者姓名： | 李晨光 |
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| 作者单位： | 湖南省有色236队!湖南 |
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| 摘 要： | 研究区冷家溪群浅变质岩系沉积后至少经历了加里东期、燕山期和喜山期3期构造运动，劈理、面理、线理、小褶皱等发育，构造置换强烈、构造变形复杂，大多数情况下很难通过产状测量来确定原始层序及其划分。查明矿区以紧闭褶皱为主，处于一叠加倾伏向斜核部，并发现了长约790m的F2韧性剪切带。指出《湖南省岩石地层》（1997.6）将冷家溪群划分为5个组可能有误，各个组也不可能有那么大的地层厚度。
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| 关 键 词： | 劈理 小褶皱 韧性剪切 冷家溪群 金矿区 线理 构造变形特征 |
STUDY ON THE CHARACTERISTICS OF STRUCTURAL DEFORMATION IN YANJIA GOLD DEPOSIT IN GANGANG, NINGXIANG COUNTY, HUNAN |
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| Abstract: | The study shows that the weakly metamorphic rocks of Lengjiaxi group in the mine are absolutely not the monocline. At least, the weakly metamorphic rocks experienced Caledonian, Yanshanian, and Himalayan movement, and developed cleavages, foliations, lineations and small folds. Transposition of structure is very intensive, and the structural deformation is very complicated. So, it can not be classified the primitive superposition by measuring their attitude. The author suggests that it maybe wrong to classify the Lengjiaxi group into 5 formations in the book of Hunan Lithostratigraphy, and the thick of all the formations may not be so thick as described in the book. The mine is in the core of an overlapped plunging syncline, and closed folds dominate the folds in the mine. A ductile-shear belt No.2 with 790 m long was discovered and a gold ore body was enclosed after analyzing samples. |
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| Keywords: | Cleavages Small fold Ductile-shear belt Lengjiaxi group Gold deposit |
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