| 吉林省金城洞绿岩带构造变形序列 |
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| 引用本文： | 曾庆栋,戴薪义.吉林省金城洞绿岩带构造变形序列[J].吉林地质,1994,13(1):60-68. |
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| 作者姓名： | 曾庆栋 戴薪义 |
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| 作者单位： | 吉林省地质科学研究所 |
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| 摘 要： | 金城洞绿岩带自晚太古代以来经历了多期变形：Ｄ＿１变形幕，形成片理、片麻理及无根褶曲，是深部构造层次的产物；Ｄ＿２变形幕，形成轴面片理及一系列轴向ＮＷ或ＮＷＷ向的紧闭同斜或平卧褶皱，并伴有英云闪长岩—奥长花岗岩侵入，是中深部构造层次的产物；Ｄ＿３变形幕，形成大型开阔褶皱，晚期形成韧性剪切带，是中浅部构造层次的产物。这三幕变形奠定了本区的基本构造格架。Ｄ＿４变形幕在中浅构造部位形成ＮＥ向开活褶皱。古生代以来，本区主要发生脆性变形。
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| 关 键 词： | 金城洞 绿岩带 构造变形序列 吉林 |
STRUCTURAL DEFORMATION SEQUENCE OF THE JINCHENGDONG GREENSTONE BELT |
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| Zeng Qingdong Dai Xinyi Liu Shichen.STRUCTURAL DEFORMATION SEQUENCE OF THE JINCHENGDONG GREENSTONE BELT[J].Jilin Geology,1994,13(1):60-68. |
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| Authors: | Zeng Qingdong Dai Xinyi Liu Shichen |
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| Abstract: | Since the late Archean era,the Jinchengdong greenstone belt had suffered polystagestructure deformations.The deformation episode(D_1) formed schistosity , gneissic schistosityand the unrooted folds. They were products of the deep tectonic levels; D_2 deformationepisode formed axial plane schistosity, aseries of NW or NWW axial close congruous foldsand recumbent folds, associated with intrusion of quartz-biotite diorite and trondjemite. They were products of the middle-deep tectonic levels;D_3 deformation epidode formed openfolds and ductile shear belts, and they were products of the middle-shallow tectonic levels. These three deformations established the tectonic framwork of the Jinchengdong area. D_4 de-formation episode mainly formed open folds of NE strike in the middle-shallom level.SincePalaeozoic era,greenstone belt mainly occurred as brittle deformation. |
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| Keywords: | Deformation episode Ductile shear belt Jinchengdong greenstone belt |
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