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胶东大邓格金多金属矿床地质地球化学特征及意义

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文章导航 > 中国地质 > 2016 > (1): 221-237

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李杰, 宋明春, 李世勇, 周晓剑, 宋英昕, 丁正江, 杨立新, 王珊珊, 姜帆, 李倩. 胶东大邓格金多金属矿床地质地球化学特征及意义[J]. 中国地质, 2016, (1): 221-237. doi: 10.12029/gc20160116
引用本文: 李杰, 宋明春, 李世勇, 周晓剑, 宋英昕, 丁正江, 杨立新, 王珊珊, 姜帆, 李倩. 胶东大邓格金多金属矿床地质地球化学特征及意义[J]. 中国地质, 2016, (1): 221-237. doi: 10.12029/gc20160116
shu
LI Jie, SONG Ming-chun, LI Shi-yong, ZHOU Xiao-jian, SONG Ying-xin, DING Zheng-jiang, YANG Li-xin, WANG Shan-shan, JIANG Fan, LI Qian. Geological and geochemical features of the Dadengge gold polymetallic deposit in Jiaodong Peninsula[J]. Geology in China, 2016, (1): 221-237. doi: 10.12029/gc20160116
Citation: LI Jie, SONG Ming-chun, LI Shi-yong, ZHOU Xiao-jian, SONG Ying-xin, DING Zheng-jiang, YANG Li-xin, WANG Shan-shan, JIANG Fan, LI Qian. Geological and geochemical features of the Dadengge gold polymetallic deposit in Jiaodong Peninsula[J]. Geology in China, 2016, (1): 221-237. doi: 10.12029/gc20160116
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胶东大邓格金多金属矿床地质地球化学特征及意义

  • 1.

    石家庄经济学院资源学院, 河北石家庄 050031

  • 2.

    山东省地质矿产勘查开发局, 山东济南 250013

  • 3.

    山东省物化探勘查院, 山东济南 250013

  • 4.

    环境保护部核与辐射安全中心, 北京 100082

  • 5.

    山东省地质科学研究院, 山东济南 250013

  • 6.

    山东省第三地质矿产勘查院, 山东烟台 264200

  • 7.

    山东省第六地质矿产勘查院, 山东威海 264209

Geological and geochemical features of the Dadengge gold polymetallic deposit in Jiaodong Peninsula

  • 1.

    College of Resources, Shijiazhuang University of Economics, Shijiazhuang 050031, Hebei, China

  • 2.

    Shandong Bureau of Geology and Mineral Resources, Jinan 250013, Shandong, China

  • 3.

    Geophysics and Geochemistry Research Institute in Shandong Province, Jinan 250013, Shandong, China

  • 4.

    Nuclear and Radiation Safety Center of MEP, Beijing 100082, China

  • 5.

    Shandong Geological Sciences Institute, Jinan 250013, Shandong, China

  • 6.

    Shandong 3rd Exploration Institute of Geology and Mineral Resources, Yantai 264200, Shandong, China

  • 7.

    Shandong 6th Exploration Institute of Geology and Mineral Resources, Weihai 264209, Shandong, China

    摘要
  • 本文介绍了大邓格金多金属矿床地质特征,对矿床主量元素、硫同位素、氢-氧同位素及流体包裹体作了测试分析,总结了矿床地球化学特征,讨论了成矿物质来源及成矿物理化学条件。主量元素分析表明蚀变过程中SiO2、K2O含量增高,Na2O、Al2O3、CaO等含量降低;硫同位素组成δ34SCDT值为7.0‰~7.1‰,指示硫可能来自于均一化程度较高的统一流体库;氢同位素组成δ DV-SMOW变化范围较大,为-83.68‰~-116.95‰,氧同位素组成δ18O水值为-2.57‰~8.35‰,显示了成矿流体以岩浆水与大气降水组成的混合水为主;成矿流体主要为中温(86~429℃)、低盐度(1.74%~22.38%NaCleq),属CO2-H2O-N2-NaCl体系。成矿期流体表现出多期、多来源特征,体系物理化学条件的改变和流体的不混溶是导致金等成矿元素沉淀和富集的重要机制。
    In this paper, the authors described the geological features of the the Dadengge gold polymetallic deposit, analyzed major elements, REE, sulfur isotope, δDV-SMOW-δ18OH2O, and fluid inclusions, and then summarized the geochemical features so as to find the ore-forming genesis and physicochemical conditions. Major element analyses show that the alteration zone gained SiO2, K2O but lost Na2O, Al2O3, CaO during alteration. The sulfur isotope composition ranges between 7.0‰ and 7.1‰ δ34SCDT, suggesting that the sulfurs were of the same origin, being a unified source. The δDV-SMOW values range from -83.68‰ to -116.95‰, and theδ18OH2O values range from -2.57‰ to 8.35‰, suggesting that the mineralizing fluids were derived from the mixed magmatic and meteoric water. The mineralizing process took place under the condition of medium temperature (86-429℃) and low salinity (1.74%-22.38% NaCleq), and the mineralizing fluid might have been a CO2-H2O-N2-NaCl system. The mineralizing fluids of the main mineralization stage exhibited feature of multiple sources, and the change of physicochemical conditions and fluid immiscibility were the important mechanisms for deposition and enrichment of gold and other mineralizing elements.
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出版历程
收稿日期:  2015-06-03
修回日期:  2015-09-17
刊出日期:  2016-02-24

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