The Characteristics and Significance of Deep Fault Gouge from the Weilasituo Zinc-Copper Polymetallic Deposit in Inner Mongolia
LUO Song-ying1, CAO Jian-jin1, 2*, YI Ze-bang1, JIANG Tao1, WANG Zheng-yang1
1. Department of Earth Sciences, Sun Yat-sen University, Guangzhou 510275, China 2. Guangdong Key Laboratory of Geological Process and Mineral Resources Exploration, Guangdong 510275, China
Abstract：The six groups of fault gouge samples were collected in different middle-sections from the underground mine of the Weilasituo zinc-copper polymetallic deposit, Inner Mongolia. The samples were analyzed with X-ray diffraction (XRD) and near infrared spectrum (NIR)to explore the mineral composition features of the fault gouges and their relationship with mineralization. The results are as follows: (1) The fault gouge samples contain the clay minerals which were formed in the low temperature alteration (such as montmorillonite, kaolinite, dickite, chlorite etc.), the alteration minerals in the medium temperature or high temperature hydrothermal environment (such as graphite, black mica, pyrophyllite, barite, serpentine, tremolite, actinolite etc.), and also the mineral compositions which were closely related to mineralization (such as copper-zinc oxide, copper-vanadium-chloride, azurite, bornite etc.). (2) The mineral compositions of the fault gouge from different depth are different. Shallow earth’s surface is mainly consisted of the low metamorphic minerals, and deep underground is mainly consisted of the high metamorphic minerals. (3) The mineral composition, mineral genesis and law of development of evolution of fault gouges suggest that, they were formed in the ore and metallogenic tectonic hydrothermal activity period, and had experienced the supergene oxidation later. (4) Through the analysis of the mineral compositions and alteration mineral assemblage characteristics of the fault gouges we can speculate that, the ore deposit was formed in medium-high temperature hydrothermal environment which had experienced the process of silicide, kaolinite, chloritization, hotaru petrochemical and sericitization alteration. Therefore, the analysis of the mineral compositions and mineral assemblage characteristics of the fault gouges,not only have certain practical significance for prospecting, but also can provide important reference information to study the genesis of the deposit.
罗松英1，曹建劲1, 2*，易泽邦1，姜 涛1，王正阳1. 内蒙古维拉斯托锌铜多金属矿床深部断层泥特征及其意义[J]. 光谱学与光谱分析, 2016, 36(05): 1508-1513.
LUO Song-ying1, CAO Jian-jin1, 2*, YI Ze-bang1, JIANG Tao1, WANG Zheng-yang1. The Characteristics and Significance of Deep Fault Gouge from the Weilasituo Zinc-Copper Polymetallic Deposit in Inner Mongolia. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(05): 1508-1513.
[1] Casciello E, Cesarano M, Cosgrove J W. Geological Society, London, Special Publication, 2004, 224: 113. [2] SHAO Shun-mei(邵顺妹). Earthquake Research in Plateau(高原地震), 1994, 6(5): 51. [3] WANG Zeng-tao, SUN Yan-guang, CUI Kai-cang(王增涛, 孙延光, 崔开仓). Gold Science and Technology(黄金科学技术), 2013, 12(1): 16. [4] Wei Xiaojun, Cao Jianjin, Holub R F, et al. Journal of Geochemical Exploration, 2013, 128: 124. [5] Hu Guai, Cao Jianjin, Philip K Hopke, et al. Resource Geology, 2014, 65(1): 13. [6] YANG Lin, WANG Qing-fei, LIU Xue-fei, et al(杨 林, 王庆飞, 刘学飞，等). Geotectonica et Metallogenia(大地构造与成矿学), 2014, 38(4): 908. [7] GUO Yi-ping, CHANG Jin-xiong, LIU Hong-wei(郭义平, 常帼雄, 刘宏伟). Geology and Resources(地质与资源), 2011, 2(5): 365. [8] QU Qiang, LI Yun-gang(屈 强, 李云刚). Western Resources(西部资源), 2013, (2): 74. [9] WANG Qing-yi, ZHANG Jin-xiang, ZHANG Ting(王清义, 张金祥, 张 廷). Western Resources(西部资源), 2012, (5): 110. [10] XIU Lian-cun, ZHENG Zhi-zhong, YU Zheng-kui, et al(修连存, 郑志忠, 俞正奎, 等). Rock and Mineral Analysis(岩矿测试), 2009, 28(6): 519. [11] XIU Lian-cun, ZHENG Zhi-zhong, YU Zheng-kui, et al(修连存, 郑志忠, 俞正奎, 等). Acta Geologica Sinica(地质学报), 2007, 81(11): 1584. [12] YAN Shou-xun, ZHANG Bing, ZHAO Yong-chao, et al(燕守勋, 张 兵, 赵永超, 等). Remote Sensing Technology and Application(遥感技术与应用), 2003, 18(4): 191. [13] ZHANG Zong-gui, WANG Run-sheng, GUO Da-hai, et al(张宗贵，王润生，郭大海, 等). The Research or Method Techniques on Mineral and Rocks Identification Using Imaging Spectrometer Remote Sensing Date and Analyzing the Influence Factors(成像光谱岩矿识别方法技术研究和影响因素分析). Beijing: Geological Press(北京：地质出版社), 2006. 18.
