| 陈瑜,刘龙,沈玉洁.中国高分异花岗岩的地质特征及与钨多金属成矿作用[J].矿产勘查,2025,(1):92-107 |
| 中国高分异花岗岩的地质特征及与钨多金属成矿作用 |
| Geological characteristics of high fractionated granite and its relationship with tungsten polymetallic mineralization |
| 投稿时间：2024-04-01 |
| DOI：10.20008/j.kckc.202501009 |
| 中文关键词: 高分异花岗岩 地质特征 钨多金属 成矿作用 |
| 英文关键词: high heteromorphic granite geological characteristics tungsten polymetallic metallogenesis |
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| 中文摘要: |
| 高分异花岗岩为岩浆演化至晚期的产物，其鉴别特征及成矿作用是近年研究的热点。本文收集了中国范围内 46个典型高分异花岗岩体的地球化学数据，分析高分异花岗岩的地质特征及其与钨多金属成矿作用的关系。结果表明:(1)高分异花岗岩以 Zr/Hf、La/Ta、Y/Ho、La/Nb、K/Rb、LREE/HREE降低，较高的 Rb/Sr和 Rb/Ba比值为特征。(2)高分异 I型花岗岩富含白云母、石榴石等矿物，SiO2、A/CNK、P2O5、Zr+Nb+Ce+Y降低、Ga/Al-Zr具有降低的演化趋势；高分异 S型花岗岩富含堇青石、红柱石等矿物，SiO2、A/CNK、P2O5升高、 Zr+Nb+Ce+Y降低；高分异 A型花岗岩富含钠铁闪石等暗色矿物，Zr+Nb+Ce+Y下限值 350×10-6、成岩温度大于 800 ℃、Ga/Al-Zr具有降低的线性演化趋势。(3)高分异花岗岩内因受黏度影响，外部受温度、构造、围岩等因素影响。(4)中国富钨多金属花岗岩主要集中于华南燕山期。 |
| 英文摘要: |
| High-resolution granite is the product of magmatic evolution to the late stage, and its identificationcharacteristics and mineralization have been the focus of research in recent years. In this paper, the geochemicaldata of 46 typical high-metagranite bodies in China are collected, and the geological characteristics of high-metagranite and its relationship with tungsten polymetallic mineralization are analyzed. The results show that: (1)The high heteromorphism granite is characterized by decreasing Zr/Hf, La/Ta, Y/Ho, La/Nb, K/Rb, LREE/HREE,and higher Rb/Sr and Rb/Ba ratios. (2) High-resolution I-type granite is rich in minerals such as muscovite and gar.net, while SiO2 A/CNK, P2O5, Zr+Nb+Ce+Y decrease, and Ga/Al-Zr has a decreasing evolution trend; High-resolution S-type granite is rich in cordierite, andalusite and other minerals, while SiO2, A/CNK and P2O5 increase and Zr+Nb+Ce+Y decrease. High-resolution A-type granite is rich in dark minerals such as albite. The lower limitof Zr+Nb+Ce+Y is 350×10-6, the diagenetic temperature is above 800 ℃, and Ga/Al-Zr has a decreasing linear evo.lution trend. (3) The high-resolution granite is influenced by viscosity internally and temperature, structure, sur.rounding rock and other factors externally. (4) Tungsten-rich polymetallic granites in China are mainly concentratedin Yanshanian period in South China. |
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