| 张萱颖,胡申光,苏鹏.青海省尕龙格玛铜多金属矿床成矿特征[J].矿产勘查,2025,16(4):764-776 |
| 青海省尕龙格玛铜多金属矿床成矿特征 |
| Metallogenic characteristics of the Galonggema Cu-Polymetallic deposit in Qinghai Province, China |
| 投稿时间：2024-07-23 |
| DOI：10.20008/j.kckc.202504008 |
| 中文关键词: 铜多金属矿床 火山喷流沉积 热液叠加 尕龙格玛 青海省 |
| 英文关键词: copper polymetallic deposit volcanic jet deposition hydrothermal superposition Galongema Qinghai Province |
| 基金项目:本文受中央地质勘查基金项目“青海省治多县多彩地区铜多金属矿普查”(2009221002)资助。 |
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| 中文摘要: |
| 本文以青海省尕龙格玛铜多金属矿床为研究对象，旨在分析其地质背景、成矿特征及找矿前景，为区域矿产勘查提供理论依据。通过野外地质调查、地球化学与地球物理综合手段，重点研究了 IV和 IVI号主矿体的控矿因素及矿床成因。结果表明:矿床赋存于晚三叠世巴塘群火山岩中，受北西向断裂及火山机构控制，圈定矿体 24条，其中 IV号矿体规模最大，长 50~2000 m，厚 2~43 m，平均品位 Cu 0.31%~2.34%、Pb |
| 英文摘要: |
| This paper takes the Galonggema copper polymetallic deposit in Qinghai Province as the researchobject, aiming to analyze its geological background, mineralization characteristics and prospecting prospects, andprovide a theoretical basis for regional mineral exploration. Through field geological investigation and comprehen-sive means of geochemistry and geophysics, the ore-controlling factors and deposit genesis of the main ore bodiesNo. IV and IVI were mainly studied. The results show that: The deposit is located in the volcanic rocks of the LateTriassic Badang Group and is controlled by the northwestward fault and volcanic structure. 24 ore bodies have been delineated, among which ore body No. IV is the largest in scale, with a length of 50-2000 m and a thickness of 2-43m. The average grades are 0.31%-2.34% for Cu, 0.52%-2.08% for Pb, and 1.21%-2.13% for Zn. Mineralization isdivided into two stages. In the early stage, pyrite was formed by Marine volcanic jet deposition. In the later stage, thesuperposition and transformation of moderately acidic magmatic hydrothermal fluids formed copper-lead-zinc orebodies. Sulfur isotopes (δ34S is 1.13‰-12.37‰) and fluid inclusions (uniform temperature 178-373 ℃) The salinity(0.66%~11.22%) indicates that the ore-forming materials originate from the mixture of magmatic hydrothermal fluidand groundwater. The genesis of the deposit belongs to the type of volcanic jet deposition -hydrothermal superposi-tion. There is still considerable potential for mineral exploration in the mining area and its periphery. The researchresults can provide important references for the exploration of similar deposits in the Sanjiang mineralization Belt. |
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