| 仇银江,田江涛,李涛.东天山觉罗塔格成矿带铁铅锌矿床成矿地质特征分析[J].矿产勘查,2016,7(6):882-890 |
| 东天山觉罗塔格成矿带铁铅锌矿床成矿地质特征分析 |
| Analysis of geological characteristics of the Fe-Pb-Zn deposits in Jueluotage metallogenic belt, eastern Tianshan |
| 投稿时间：2015-05-28 |
| DOI： |
| 中文关键词: 觉罗塔格成矿带 阿齐山铅锌矿 雅满苏铁矿 成矿特征 东天山 |
| 英文关键词: eastern Tianshan, Jueluotage metallogenic belt, Aqishan Pb-Zn deposit, Yamansu Fe deposit, metallogenic characteristics |
| 基金项目:新疆维吾尔自治区基金中心两权价款项目(编号:T14-2-LQ05)资助。 |
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| 中文摘要: |
| 阿齐山—雅满苏—沙泉子成矿带是新疆东天山重要的铁、钼、银、铅、锌等多金属成矿带之一。发现于20世纪60年代的雅满苏铁矿床为区内较有影响力的中型富铁矿床之一,深部见有块状硫化物。阿齐山铅锌矿为近年通过1∶5万化探发现的中型铅锌矿床。文章通过对两个矿床成矿地质条件的对比分析,探讨了其成矿相似性和差异性,认为二者产于火山喷发沉积盆地中,受火山机构控制,均经历了硫化物成矿期→铁氧化物成矿期→火山气液交代期等3个矿化期,具有极其相似的蚀变特征。但雅满苏铁矿产出于近火山口爆发相—溢流相基性火山岩中,硫化物成矿期时间短,强度小,后期火山气液交代对矿床起到了很好的叠加富集作用。阿齐山铅锌矿产出于远火山口火山碎屑岩—火山碎屑沉积岩中,硫化物成矿期矿化强度大,铁氧化物成矿期相对较弱。雅满苏铁矿和阿奇山铅锌矿均受到后期火山气液交代作用强烈改造。通过对比可以在雅满苏一带铁矿体下部层位的细火山碎屑岩—火山碎屑沉积岩中寻找铅锌矿,在阿齐山铅锌矿床的底部夕卡岩中寻找热液交代型富铅锌矿体。 |
| 英文摘要: |
| The Aqishan-Yamansu-Shaquanzi metallogenic belt is one of the most important Fe-polymetallic metallogenic belts in the eastern Tianshan area, Xinjiang Autonomous Region. The Yamansu iron deposit discovered in 1960’s, is a medium-sized iron-rich deposit in the eastern Tianshan area. The massive sulfides were found in the deep part of the deposit. The medium-sized Aqishan Pb-Zn deposit was discovered recently by1∶50 000 scale of geochemical survey programme. Based on the comparison analysis of ore-forming geological conditions for the above-mentioned deposits, the similarity and difference between these two deposits were discussed. It is concluded that both of them were formed in the volcano eruption sedimentary basin, and controlled by volcanic crater. They had experienced three metallogenic epoches, namely sulfide deposition stage, iron-oxide deposition stage, and volcano hydrothermal replacement stage, and had the similar alteration features. But the Yamansu iron orebodies occurred in the basic volcanic rocks of the eruption-overflow phase near the volcanic vent. The period of sulfide mineralization is relative short, and the mineralization intensity relatively is low. The later volcanic hydrothermal metasomatism plays the important role in the superposition and enrichment of mineralization. The Aqishan lead-zinc orebodies occurred in the volcanic clastic rocks and volcanic calstic sedimentary rocks far from the volcanic vent. The mineralization intensity of the sulfide deposition stage was stronger, and that mineralization intensity of the iron oxide deposition stage during the explosive flow deposition was relatively low. The later stage volcanic hydrothermal metasomatism reformed both of the deposit significantly. According to the analysis results, it is predicted that the Pb-Zn orebodies may be prospected in the volcanic clsatic rocks and volcanic clastic sedimentary rocks in the lower part of Yamansu Fe deposit, and the hydrothermal metasomatism high grade Pb-Zn orebodies may be found in the lower skarn in the Aqishan Pb-Zn deposit. |
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