| 鲁奎山铁矿逆冲推覆系与成矿 |
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| 引用本文： | 黄维全,刘毅,林菲.鲁奎山铁矿逆冲推覆系与成矿[J].云南地质,2004,23(1):60-66. |
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| 作者姓名： | 黄维全 刘毅 林菲 |
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| 作者单位： | 云南地矿资源股份有限公司,曲靖公司,云南,曲靖,655000 |
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| 摘 要： | 对鲁奎山向斜东西两翼构造变形、赋矿特征、成矿规律、控矿因素的分析，及在东翼开展地质物探综合找矿中发现，早期鲁奎山裂陷槽中、昆明群大龙口组的含菱铁质矿源层。卷入构造变形变质后已经历不同层间剥滑构造多次错移或碾碎。后期次生淋漓富集，含矿热液交代蚀变和层间滑剥构造再次叠加改造，改变原来沉积变质含菱铁质矿源层或贫矿体的属性，形成类似于原生沉积、又具有热液交代蚀变和构造岩特征的层状富铁矿体。经坑道进一步揭露证实，沿鲁奎山向斜东西两翼断续分布、已经二次富集成矿的各矿床(点)，实际上是在具层间构造性质的环形断裂带控制下所形成的沉积变质后生矿床类型。表～浅部脆性断裂形成的热液交代与充填脉状矿体，局部叠加在沿环形断裂带内“层状”矿体之上，增加了找寻厚大巢状矿体的可能性。这一新的成矿与控矿规律，为重新认识原“鲁奎山式沉积变质铁矿床”提供了实践基础，同时也为在该区域找矿指明方向。
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| 关 键 词： | 铁矿 赋矿特征 成矿规律 控矿因素 |
| 文章编号： | 1004-1885(2004)01-060-07 |
THE RELATIONSHIP BETWEEN NAPPE SYSTEM AND METALLOGENESIS OF THE LUKUISHAN IRON DEPOSIT |
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| HUANG Wei-quanLIU YiLIN Fei.THE RELATIONSHIP BETWEEN NAPPE SYSTEM AND METALLOGENESIS OF THE LUKUISHAN IRON DEPOSIT[J].Yunnan Geology,2004,23(1):60-66. |
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| Authors: | HUANG Wei-quanLIU YiLIN Fei |
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| Abstract: | According to the analysis of structural deformation,ore-bearing characteristics,metallogenetic rule and ore-controlling factor of the Lukuishan syncline and the geological geophysical comprehensive ore-prospecting work on the east limb,the siderite ore-origin bed in Dalongkou Formation of Kunyang Group in the Lukuishan rift experienced many times of interbed dislocation or crushing after the structural deformation and metamorphism,The original sedimentary and metamorphie siderite ore-origin bed or poor orebody was changed by the later secondary leaching concentration,ore-bearing hydrothermal alteration and interbed slipping structure and then formed the stratiform rich iron orebody similar to the original sedimentation and with hydrothermal alteration,tectonite characteristics.According to the pitting exploration,the secondary enrichment ore deposits distributed discontinuously on the east and west limbs of Lukuishan syncline are actually the epigenetic sedimentary metamorphic ore deposits controlled by the ring fault zone with interbed structure characteristics.And the hydrothermal metasomatic and filling veinlike orebodies formed by the surface and shallow brittle faults superimposed partly on the "stratiform"orebodies in the ring fault zone,which increases the possibility of discovering the thick nest orebodies.These new metallogenetic and ore-controlloing rules provide a practical basis for the re-avaluation of "Lukuishan-type sedimentary metamorphic iron deposit"and point out a new ore-prospecting direction in this area. |
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| Keywords: | Siderite Ore-Origin Bed Ploughform Ring Fault Secondary Leaching Enrichment Sedimentary Metamprphic Epigenetic Ore Deposit Lukuishan Xinping |
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