| 阿尔泰南缘麦兹泥盆纪火山_沉积盆地成矿特点及其铅锌、铁、金找矿潜力分析 |
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| 引用本文：.2007.Characteristics and Pb-Zn, Fe and Au exploration potentials of Maize Devonian volcano-sedimentary basin on southern margin of Altay [J].Mineral Deposits,26(1):128~138 |
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| 基金项目:中央专项资金项目新疆富蕴县可可塔勒铅锌矿及外围预普查（Zyzxyc2006_11）和中国科学院知识创新工程重要方向项目(KZCXZ_YW_107) |
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| 中文摘要:麦兹盆地位于西伯利亚板块南缘阿尔泰陆缘活动带中，是一个重要的铅、锌、铁矿化集中区，其中著名的有蒙库大型铁矿床、可可塔勒大型铅锌矿床，是阿尔泰南缘多金属成矿带中最重要的成矿盆地之一。盆地内矿床、矿点多为火山喷流热水沉积成因，层控特征明显，具有规模大、形态规则、厚度及有用组分稳定等特点。铁矿成矿与早泥盆世早期细碧角斑质火山作用相伴，而铅锌成矿则与早泥盆世晚期长英质火山喷流沉积作用相伴。通过对麦兹盆地成矿地质特征和典型矿床中矿体分布变化规律的研究，认为北西向同生断裂、火山沉积洼地、火山喷发中心(火山机构)共同控制铅锌矿的产出，矿体还受到后期褶皱、变质作用的改造。根据有利层位、火山岩相、喷流沉积岩、热液蚀变、矿化组合、铁帽、控矿构造和地球化学异常等综合找矿评价标志，分析了可可塔勒矿区深部、什根特、铁热克萨依、H_48号异常的铅锌找矿潜力，并探讨了盆地内铁、金的找矿潜力，指出了进一步找矿的方向与有利地段。 |
| 中文关键词:地质学 火山沉积盆地 喷流沉积成矿 铅锌、铁、金矿 麦兹盆地 阿尔泰南缘 |
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| Characteristics and Pb-Zn, Fe and Au exploration potentials of Maize Devonian volcano-sedimentary basin on southern margin of Altay |
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| Abstract:Lying in the active belt of Altay paleo_continental margin along the southern rim of Siberia plate, Maize basin is an important Pb_Zn and Fe metallogenic center and possesses such important deposits as the Mengku large_scale Fe deposit and the Keketale large_scale Pb_Zn deposit. The known deposits and ore spots are of volcanic sedimentary_exhalative type characterized by stratabound formation, large size, regular mode of occurrence, stable thickness and useful compositions. All this makes the Maize basin one of the most important metallogenic basins in the polymetallic belt on the southern margin of the Altay orogen. This paper has dealt in detail with the ore_controlling process of the spread continental margin, fractures and volcanic sequences, volcano_sedimentary centers, favorable ore_convergent depressions and sedimentary formation associations. Geological features and distribution of typical deposits show that the formation of Pb_Zn deposits is controlled by NW_trending contemporaneous faults, volcano_sedimentary basins and eruption centers, and that the volcanic eruption centers and corresponding volcano_sedimentary basins are mostly locations of VHMS polymetallic deposits. Based on comprehensive criteria for mineral prospecting and assessment such as favorable ore_bearing horizons, gossans, volcanic facies, hrdrothermal alterations, exhalative sedimentary rocks, mineralization associations and geochemical anomalies, this paper has discussed the prospecting potential at the depth of the Keketale deposit as well as the ore_seeking vista of regional Shigente, Tierekesayi and H_48 anomalies for Pb_Zn mineralization. In addition, the prospects in search for Au and Fe deposits are also discussed. |
| keywords:geology, volcano_sedimentary basin, volcano_exhalative sedimentary process, Pb_Zn_Fe_Au mineralization, Maize basin, southern margin of Altay |
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