| 江克一,刘智海.辽东青城子矿田的叠加褶曲构造[J].地质找矿论丛,1990,(3):22-35 |
| 辽东青城子矿田的叠加褶曲构造 |
| SUPERPOSED FOLD OF QINGCHENGZI ORE FIELD, LIAONING PROVINCE |
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| DOI：10.6053/j.issn.1001-1412.1990.3. 003 |
| 中文关键词: 叠加褶曲 翻卷褶曲 塑性断层 上涌构造 混合热液层控矿床 显微组构 |
| 英文关键词: |
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| 摘要点击次数: 1212 |
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| 中文摘要: |
| 青城子矿田叠加褶曲由下元古界辽河群组成.东西向开阔走向褶曲为北北西向翻卷褶曲所横跨.翻卷褶曲平面上呈弓形,向西凸出.因大部被剥蚀,只在高处保存一些滑动地体残块.其前缘和围岩,倒转翼和上下正常褶曲都与塑性断层接触.由于翻卷褶曲的作用,引起走向褶曲形态和有关岩层产状规律性的变化,以及有关地层厚度规律性地减薄直至尖灭.矿田翻卷背斜核部为混合花岗岩,其中有"末太古界"残块,推测矿田翻卷褶曲为混合岩浆上涌构造.在翻卷褶曲作用影响范围内的矿床,都是混合热液层控矿床. |
| 英文摘要: |
| The superposed fold of Qingchengzi ore field is made of the epi-archean and early Proterozoic Group. The EW open strike-folds are crossed by the NNW recumbent fold. On the plan the front border of recumbent fold appears to be an arch convex to west, but it crops as klippen for denudation. Between its front border and country rocks as well as its overturned limb and normal limbs there exist main plastic faults. The recumbent folding regularly leads the form of strike-folds to reform, the attitudes of the related strata to change and the thickness of the related strata to thin and to die out.The Qingchengzi ore field is located between the Ω-type structure region and the strike-fold belt. In the core of the recumbent anticline of ore field is Luliang cycle migmatic granite within which scatter the epiarchean remains with disordered attitudes. So The recumbent fold of ore field is not a nappe structure, but a migma-upwelling structure.Qingchengzi ore field includes 13 ore deposits all of which are in the sphere of influence of the ore-field recumbent folding. They are the migmatie hydrothermal stratabound deposits which are intensely reworked in the Mesozoic in the west of the ore field. Based on them, the prospecting targets are pointed out. |
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