| 吉南太古宙岩群中的大型构造置换及其对BIF矿体的控制 |
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| 引用本文： | 刘如琦.吉南太古宙岩群中的大型构造置换及其对BIF矿体的控制[J].地质科学,2004,39(3):407-415. |
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| 作者姓名： | 刘如琦 |
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| 作者单位： | 中国钢铁工业贸易集团公司天津地质研究院,天津,300061 |
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| 摘 要： | 以吉林省白山市板石沟铁矿区为典型实例,系统地论述了太古宙岩群中广泛发育的大型和区域性构造置换的几何特征和对BIF矿体的控制规律。本区构造置换主要表现为:在紧闭同斜褶皱发育的持续变形过程中形成S1≈S0,并伴有钩状褶皱、石香肠构造和各类型线理的生成。按照主构造面均匀性法则,划分了构造均匀区段,并对其中8个区段(Ⅰ～Ⅷ)进行了详细的SFLπ组构分析。基于构造置换规律研究,提出本区褶皱轴与包络线双向找矿的理论与方法,经工程验证,取得显著的经济效益。
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| 关 键 词： | 构造置换 π-组构 钩状褶皱 隐伏矿体 |
| 文章编号： | 0563-5020(2004)03-0407-09 |
| 收稿时间： | 2003-06-09 |
| 修稿时间： | 2003年6月9日 |
LARGE-SCALE TRANSPOSITION IN ARCHAEAN ROCKS OF SOUTHERN JILIN PROVINCE AND ITS CONTROLLING EFFECT ON THE BIF ORE BODIES |
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| Liu Ruqi.LARGE-SCALE TRANSPOSITION IN ARCHAEAN ROCKS OF SOUTHERN JILIN PROVINCE AND ITS CONTROLLING EFFECT ON THE BIF ORE BODIES[J].Chinese Journal of Geology,2004,39(3):407-415. |
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| Authors: | Liu Ruqi |
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| Institution: | Tianjin Geological Academy, China Iron and Steel Industry and Trade Group Cooperation, Tianjin 300061 |
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| Abstract: | The geometrical characteristics and its controlling effect on the BIF ore bodies were systematically described of a large-scale tectonic transposition developed in the Archaean rocks in Banshigou Iron Ore Mine area, Baishan city, Jilin Province, where was taken as a typical example for studying the Archaean structures. The main feature of transposition, S1≈S0, was considered to be developed by progressive deformation during formation of the tight to isoclinal folds. The hook-shaped folds, boudinages and lineations of many types were structures accompanying tectonic transposition. The homogeneous domains were divided within the typical area by considering homogenity of the main structural foliation, among these 8 domains (Ⅰ～Ⅷ) were selected for detailed SFLπ-fabric analysis. In looking for buried iron-ore bodies, two-direction (i,e along both the axial line and the enveloping line directions) exploration was theoretically and methodically proposed and generally in use in this mine, which showed a prominent economical advantages. |
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| Keywords: | Tectonic transposition π-Fabrics Hook-shaped folds Buried ore bodies |
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