| 杨芳芳,廖树衡,吴明梅,高爽.贵州省从江县地虎铜多金属矿床地球化学特征[J].贵州地质,2018,35(2):102-108 |
| 贵州省从江县地虎铜多金属矿床地球化学特征 |
| Geochemical Characteristics of Dihu Cooper Polymetallic Deposit in Congjiang Country，Guizhou Province |
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| DOI： |
| 中文关键词: 地虎 铜多金属矿床 地球化学特征 贵州从江 |
| 英文关键词:Dihu Cooper polymetallic deposit Geochemical characteristics Congjiang Guizhou |
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| 中文摘要: |
| 地虎矿床为蚀变岩型铜多金属矿床，围岩普遍发生蚀变。矿石的主量元素和微量元素分析结果显示，矿石中TiO2和K2O含量较低，微量元素中Ta的含量也较低。除了Nb/U值有较大差别外，其余的Th/Hf、Th/Zr、Nb/Zr、Zr/Y等比值都比较接近。稀土元素总体富集轻稀土，LREE/HREE值和（La/Sm）N值分别为1.0129.095、1.4095.997，变化范围较大，说明LREE、HREE内部分馏较明显；δEu、δCe分别为0.6131.507、0.991.54，Eu正负异常明显，Ce主要显示正异常；稀土元素球粒陨石标准化图解曲线表现为右倾型。这些地球化学特征与宰变镁铁-超镁铁质岩体的地球化学特征相似，说明地虎矿床中的部分成矿物质可能来源于宰变镁铁-超镁铁质岩体，地虎矿床的形成可能是在板内拉张过程中同时或稍晚形成。 |
| 英文摘要: |
| Dihu deposit is altered rock type cooper polymetallic deposit，the wall rock generally altered. The major element and trace element analysis of ore shows：the content of TiO2 and K2O in the ore is low，Ta of trace element also is low. Except Nb/U value，the ratio of Th/Hf，Th/Zr，Nb/Zr，Zr/Y are very close. Rare earth generally is light rare earth concentration，the LREE/HREE value and （La/Sm）N value is 1.012 to 9.095 and 1.409 to 5.997，the range is great and it means part obvious fraction in LREE and HREE. δEu and δCe is 0.613 to 1.507 and 0.99 to 1.54，Eu has obvious negative and positive anomalies，Ce mainly shows positive anomaly. The chndrite normalized REE patterns of Dihu displays for the rigt type. Dihu deposit and the Zaibian mafic-ultramafic rock have a similar geochemical characteristics，it explains that part of ore-forming materials of Dihu deposit may originate from Zaibian mafic-ultramafic rock and its mineralization possibly occurred in the process of tension in the plate at the same time or a little late. |
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