| 甘长福,孔维宾,张凯强,吴生伟,申元强.青海都兰县瓦勒尕南金矿地质特征及成因分析[J].矿产勘查,2026,17(S1):102-108 |
| 青海都兰县瓦勒尕南金矿地质特征及成因分析 |
| Geological characteristics and genesis analysis of the Waleganan gold deposit in Dulan County， Qinghai Province |
| 投稿时间：2026-01-10 修订日期：2026-04-28 |
| DOI：10.20008/j.kckc.2026S1012 |
| 中文关键词: 瓦勒尕南金矿 地质特征 流体包裹体 矿床成因 东昆仑 |
| 英文关键词: Wallekanan gold deposit geological features fluid inclusions genesis of the deposit east Kunlun |
| 基金项目:本文受山东黄金科研项目（HYHA2022-1014）资助。 |
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| 中文摘要: |
| 瓦勒尕南金矿是东昆仑沟里金矿集区新发现的一处热液脉型金矿床，矿体呈脉状赋存于断裂构造带中。本文系统地开展了地质特征调查、流体包裹体测试、稳定同位素及成矿年代学分析等研究工作，查明了该矿床的地质特征及成因。研究结果表明：矿区出露地层为古元古界金水口群变质岩系，金矿体严格受NE向断裂构造控制，成矿流体主要为中温（171.0~360.2℃）、低盐度（1.63~17.5 wt.% NaCl eqv）、低密度的H2O-CO₂-NaCl体系，成矿压力75~109 MPa，对应深度7.04~8.65 km。H-O同位素显示成矿流体以幔源为主，S同位素暗示硫源具多源性。热液锆石U-Pb年龄为236.7 Ma，表明成矿作用发生于印支期。综合认为，瓦勒尕南金矿是印支期构造-岩浆活动中，由幔源流体主导、受断裂构造严格控制的中温热液脉型金矿。 |
| 英文摘要: |
| The Waleganan gold deposit is a newly discovered hydrothermal vein-type gold deposit in the Dongkunlun Guli gold concentration area. The ore body is vein-like and exists in the fault structural zone. This time， systematic research work such as geological feature investigation， fluid inclusion testing， stable isotope and metallogenic chronology analysis was carried out， and the geological features and genesis of this deposit were clarified. The research results show that： The exposed ground layer in the mining area is the Paleoproterozoic Jinshuikou Group metamorphic rock series. The gold ore body is strictly controlled by the northeast-trending fault structure. The ore-forming fluid is mainly a medium-temperature （171.0~360.2℃）， low-salinity （1.63~17.5 wt% NaCl eqv）， and low-density H2O-CO2-NaCl system. The mineralization pressure is 75~109 MPa， corresponding to a depth of 7.04-8.65 km. H-O isotopes indicate that the ore-forming fluids are mainly mantle sources， while S isotopes suggest that the sulfur sources are multi-source. The U-Pb age of hydrothermal zircon is 236.7 Ma， indicating that the mineralization occurred during the Indosinian period. It is comprehensively believed that the Waleganan gold deposit is a mesothermal hydrothermal vein-type gold deposit dominated by mantle-source fluids and strictly controlled by fault structures during the Indochinese tectonic-magmatic activities. |
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