文章摘要
许译月,张建强,张陆佳,蒲兴明,杨修志,张龙,张刚阳.滇东南南温河钨矿床加里东期花岗岩岩石地球化学特征及成矿意义[J].矿产勘查,2026,17(1):111-123
滇东南南温河钨矿床加里东期花岗岩岩石地球化学特征及成矿意义
Geochemical characteristics and metallogenic significance of Caledonian granite in Nanwenhe tungsten deposit, southeastern Yunnan
投稿时间：2025-04-10  
DOI：10.20008/j.kckc.202601009
中文关键词: 年代学  地球化学  老城坡岩体  南捞岩体  南温河钨矿床
英文关键词: geochronology  geochemistry  Laochengpo rock mass  Nanlao rock mass  Nanwenhe  tungsten deposit
基金项目:本文受四川省科技计划项目(2022YFS0465，2022YFS0451)、文山麻栗坡紫金钨业集团有限公司项目(AH2022-0125)联合资助。
作者单位
许译月 成都理工大学地球与行星科学学院,四川成都 610059 
张建强 文山麻栗坡紫金钨业集团有限公司,云南文山 663600
紫金矿业集团股份有限公司,福建厦门 361000 
张陆佳 文山麻栗坡紫金钨业集团有限公司,云南文山 663600
紫金矿业集团股份有限公司,福建厦门 361000 
蒲兴明 文山麻栗坡紫金钨业集团有限公司,云南文山 663600
紫金矿业集团股份有限公司,福建厦门 361000 
杨修志 文山麻栗坡紫金钨业集团有限公司,云南文山 663600
紫金矿业集团股份有限公司,福建厦门 361000 
张龙 成都理工大学地球与行星科学学院,四川成都 610059 
张刚阳 成都理工大学地球与行星科学学院,四川成都 610059 
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中文摘要:
      南温河矿床位于云南省麻栗坡县，是滇东南地区最大的钨多金属矿床。南温河钨矿主要赋矿地层为古元古界南秧田组，钨矿体呈似层状夹持于顶部的老城坡片麻状花岗岩和底部的南捞花岗片麻岩之间。在前人研究基础上，本文以老城坡、南捞两个岩体为研究对象，分析其成岩年代和岩石成因。老城坡岩体的 SiO2含量介于 66.86%～77.57%；全碱(K2O+Na2O)含量为 6.74%～8.95%；K2O/Na2O介于 1.02~2.61，铝饱和指数 A/CNK为 1.01~1.26。稀土元素总量变化介于 36.19×10-6~289.57×10-6(La/Yb)N为 2.28~10.95，δEu为 0.20~0.65；捞岩体的 SiO2含量介于 68.86%～75.57%；全碱(K2O+Na2O)含量为，5.74%～9.73%；K2O/Na2O介于 1.07~3.65，南铝饱和指数 A/CNK为 1.04~1.98。稀土元素总量变化介于 30.47×10-6~717.66×10-6，(La/Yb)N为 3.26~36.71， δEu为 0.17~0.70。地球化学指标说明这两个岩体均属于高钾钙碱性系列，为强过铝质 S型花岗岩，是古老地壳物质部分熔融的产物，其源岩为泥砂质岩类。锆石 U-Pb定年结果显示，南捞岩体的年龄为(426.1±2.6) Ma，老城坡岩体的年龄为(441.2±3.1)Ma，均属于加里东期志留纪岩浆作用的产物。在 Song Chay穹隆逆冲推覆构造的影响下，老城坡岩体逆冲推覆到南捞岩体和南秧田岩组地层之上。南温河地区加里东期岩浆岩明显早于区域上的钨锡成矿年龄，但富集 W(均值为 86.8×10-6)、Sn(均值为 38.7×10-6)等成矿元素，暗示南温河加里东期花岗岩虽然并不作为直接的成矿岩体，但却是南温河钨矿床成矿作用的重要物质来源。
英文摘要:
      Nanwenhe deposit is located in Malipo County, Yunnan Province, which is the largest tungstenpolymetallic deposit in southeastern Yunnan. The main ore-bearing strata of the Nanwenhe tungsten deposit is thePaleoproterozoic Nanyangtian Formation. The tungsten ore body is sandwiched between the Laochengpo gneissicgranite at the top and the Nanlao granite gneiss at the bottom in a layered manner. On the basis of previous studies,this paper takes the two rock masses of Laochengpo and Nanlao as the research objects, and analyzes their diage-netic age and petrogenesis. The SiO2 content of Laochengpo rock mass is between 66.86% and 77.57%. The total al-kali (K2O+Na2O) content is 6.74%-8.95%. The K2O/Na2O ratio ranges from 1.02 to 2.61, and the aluminum satura-tion index A/CNK ranges from 1.01 to 1.26. The total amount of rare earth elements varies between 36.19×10-6-289.57×10-6, (La/Yb)N is 2.28~10.95, δEu is 0.2-0.65 ; the SiO2 content of Nanlao rock mass is between 68.86% and 75.57%. The total alkali (K2O+Na2O) content is 5.74%-9.73%. The K2O/Na2O is between 1.07 and 3.65, andthe aluminum saturation index A/CNK is between 1.04 and 1.98. The total amount of rare earth elements varies from30.47×10-6 to 717.66×10-6, (La/Yb)N is 3.26-36.71, and δEu is 0.17-0.70. Geochemical indicators indicate that these two rock masses belong to the high-potassium calc-alkaline series, which are strongly peraluminous S-typegranites. They are the products of partial melting of ancient crustal materials, and their source rocks are argillaceousrocks. The results of zircon U-Pb dating show that the age of Nanlao rock mass is (426.1±2.6) Ma, and the age ofLaochengpo rock mass is (441.2±3.1) Ma, both of which belong to the product of Caledonian Silurian magmatism.Under the influence of the Song Chay dome thrust nappe structure, the Laochengpo rock mass thrusted over the Nan-lao rock mass and Nanyangtian rock formation. The Caledonian magmatic rocks in the Nanwenhe area are obviouslyearlier than the regional tungsten-tin metallogenic age, but they are enriched in W (mean value is 86.8×10-6), Sn (mean value is 38.7×10-6) and other metallogenic elements, suggesting that the Nanwenhe Caledonian granite is notas a direct metallogenic rock mass, but it is an important material source for the mineralization of the Nanwenhetungsten deposit.
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