| 吴碧娟,蒋明光,赖健清,彭南海,郝玉军.东昆仑坑得弄舍多金属矿床岩浆成因与成矿作用[J].矿产勘查,2026,17(8):1443-1453 |
| 东昆仑坑得弄舍多金属矿床岩浆成因与成矿作用 |
| Magmatic genesis and mineralization of the Kengdenongshe polymetallic deposit in the East Kunlun |
| 投稿时间：2025-09-11 |
| DOI：10.20008/j.kckc.202608011 |
| 中文关键词: 坑得弄舍多金属矿床 岩浆成因 成矿作用 东昆仑中图分类号:P618.51文献标志码:A文章编号:1674-7801(2026)08-1443-11 |
| 英文关键词: Kengdenongshe polymetallic deposit magmatic origin mineralization East Kunlun |
| 基金项目:本文受深地国家科技重大专项:藏西北—东昆仑铜金(锑)富集成矿规律与找矿预测项目第三课题专题2“构造蚀变岩型锑金矿综合找矿方法组合与勘查模型研究”(2025ZD1006203-2)资助。 |
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| 中文摘要: |
| 东昆仑造山带内发育的坑得弄舍大型 Au-Ag-Pb-Zn多金属矿床产于上二叠统—三叠系流纹质凝灰岩中。矿区集中发育印支期侵入岩和喷出岩，与矿化关系密切。喷出岩为下三叠统凝灰岩与流纹岩类，侵入岩发育有细粒花岗岩、花岗闪长岩、花岗斑岩和石英斑岩以及与成矿密切相关的隐爆角砾岩。矿区中酸性—酸性岩浆岩属过铝质花岗质岩类，具高硅、过铝质、高钾钙碱性-钾玄质和高分异的特征。各类火成岩的微量元素组成显示其属于地壳来源，属同源岩浆演化分异的结果，暗示其属同一岩浆晶粥体系。S-Pb同位素组成揭示成矿物质来源于岩浆，成矿主要与花岗斑岩与凝灰岩有关。研究表明坑得弄舍多金属矿床形成于晚二叠世弧后伸展—三叠纪弧-陆碰撞期间。 |
| 英文摘要: |
| The large-scale Kengdenongshe Au-Ag-Pb-Zn polymetallic deposit in the East Kunlun OrogenicBelt is hosted within Late Permian to Triassic rhyolitic tuff. The mining area is characterized by the concentrated de.velopment of Indosinian intrusive and extrusive rocks, which are closely associated with Au-Pb-Zn mineralization.The extrusive rocks consist of Lower Triassic tuff and rhyolite, while the intrusive rocks include fine-grained gran.ite, granodiorite, granite porphyry, and quartz porphyry that is closely related to ore-formation. The intermediate-acid to acid magmatic rocks in the mining area belong to peraluminous granitoids, exhibiting high silicon content,peraluminous characteristics, high-K calc-alkaline to shoshonitic affinity, and highly differentiated features. Thetrace element compositions of various igneous rocks indicate a crustal origin, resulting from the evolution and differ.entiation of co-magmatic magma, suggesting they belong to the same magmatic mush system. S-Pb isotopic compo.sitions reveal that the ore-forming materials were derived from magmatic sources, with mineralization primarily as.sociated with granite porphyry and tuff. The Kengdenongshe polymetallic deposit formed during the transition fromLate Permian back-arc extension to Triassic arc-continent collision. |
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