GLOBAL GEOLOGY Vol. 32 No. 1 Mar : 棉田金铜矿床是受断裂构造和

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1 GLOBAL GEOLOGY Vol. 32 No. 1 Mar : 棉田金铜矿床是受断裂构造和中性侵入体联合控制的以金铜为主的多金属矿床笔者在对该区地质调查的基础上, 运用红外光谱分析和显微测温技术对成矿流体进行研究, 发现该区围岩蚀变以绢云母化和青磐岩化最为普遍, 并将成矿阶段分为 4 个阶段 : 黄铁绢英岩阶段石英 - 黄铁矿阶段多金属硫化物阶段和石英 - 碳酸盐阶段 ; 对应的均一温度为 320 ~ ~ ~ 280 和 200 ~ 240 ; 其中主成矿阶段为第二三阶段, 主成矿温度为 200 ~ 320, 这也是热液中水和二氧化碳含量最高的阶段流体盐度为 ~ ( wt%,nacl), 密度为 ~ g /cm 3, 具低盐度和低密度的特点 ; 成矿深度为 0. 8 ~ 1. 5 km, 具浅层成矿的特点 ; 氢氧同位素分析, δ 18 O H2 O 的值为 ~ ,δD H2 O 的值为 ~ , 说明成矿流体主要为岩浆水, 含少量大气水综合研究表明, 棉田金铜矿床属于浅成中温岩浆热液型矿床 : 棉田金铜矿床 ; 流体包裹体 ; 红外光谱 ; 矿床成因 : P ; P : A doi: /j. issn Characteristics of ore-forming fluids and ore genesis of Miantian gold-copper deposit in Yanbian of Jilin Province WU Tao-tao 1 CHEN Yue-jun 1 ZHANG Yu-feng 2 ZHANG Yong 3 ZHAO Hong-guang 4 WANG Chang-bing 1 LIU Yong-jun 1 ZHU Huai-liang 1 WU Guo-xue 1 1. College of Earth Science Jilin University Changchun China 2. Institute of Geological Survey of Inner Mongolia Autonomous Region Huhhot China 3. No. 1 Gold Geological Party of the Armed Police Force Mudanjiang Heilongjiang China 4. Faculty of Civil Engineering Changchun Institute of Technology Changchun China Abstract Miantian gold-copper deposit is a gold-copper-based multi-metal deposit controlled by faults and neutral intrusions. On the basis of geological survey we studied the ore-forming fluids by infrared spectroscopy and micro themometry. The results showed that the wall rock alteration was dominated by sericitization and propylitization and the mineralization consisted of four stages including the beresite stage quartz-pyrite stage polymetallic sulfides stage and quartz-carbonate stage Correspondingly the homogenization temperatures were 320 ~ ~ ~ 280 and 200 ~ 240 in which the second and third were the main mineralization stages corresponding homogenization temperatures from 200 to 320. At the same time there were the highest HJ wuguoxue@ 163. com

2 16 31 contents of H 2 O and CO 2 in the main mineralization stages. Salinity of fluid varied between 1. 91% and % wt% Nacl and density was ~ g /cm 3 with obvious characteristics of low salinity and density. The main ore-forming depth was from 0. 8 km to 1. 5 km which indicated the epizonal characteristics. Based on the compositional analytical results of fluid inclusions the values of δ 18 O H2 O and δd H2 O were ~ and ~ which illustrated that the ore-forming fluids mainly originated from magmatic hydrothermal along with a small amount of atmospheric water. Miantian gold-copper deposit belonged to medium temperature epizonal magmatic-hydrothermal deposit. Key words Miantian gold-copper deposit fluid inclusions infrared spectrum genesis of deposit Ⅳ 1 4 Ⅳ 1 Ⅳ 2 Ⅳ Ⅳ 4 NW NE SW NE Ⅳ t 46 t t Ma Ma Ma 1 Ⅳ Ⅴ Ⅵ Ⅶ Ⅷ 5 1 /

3 1 17 Fig. 1 1 Geological sketch map of Miantian gold-copper deposit a b M VIII PD 1 50 m a M IV ZK004 b Fig. 2 Field sketch map in the 50 m of M VIII PD 1 a and drill hole of M IV ZK004 b

18 31 4 3a + + 2 5-3b 2a 2 3c + + + + + - 2 3d a. Ser Qtz Py + b. Ccp Py - c.

4 a b 2a 2 3c d a. Ser Qtz Py + b. Ccp Py - c. Py Ccp Sp Gn - d. Cal + Fig. 3 3 Typical mineral assemblage in mineralization stages

5 Nicolet380 1 Table 1 1 Infrared spectroscopy and homogenization temperature of slices of quarte-inclusions CO 2 H 2 O M M M N N M M4045 M M M M M4042 M4044 M4020 M4034 M4045 M4043 CO 2 H 2 O M401 M CO N10 H 2 O - 2 N ~ 300 μm M4003 M4042 CO 2 H 2 O Linkam THMS M4003 Au Cu ~ 600 < 31 ± M4042 Au > 31 ± 2 14 M4003 Cu % ~ 50% 10% ~ 30% IV M4003

20 31 V RV L Fig. 4 4 Micrographs of fluid inclusions 4 ~ 22 μm 8 ~ 12 μm 4 40 MPa 3. 2 0. 8 ~ 1. 5 km 187. 2 ~ 366. 2 3. 3 5a b c d 11-17 δ 18 O H2 O 320 ~ 360-4. 7 10-3 ~ 5.

6 20 31 V RV L Fig. 4 4 Micrographs of fluid inclusions 4 ~ 22 μm 8 ~ 12 μm 4 40 MPa ~ 1. 5 km ~ a b c d δ 18 O H2 O 320 ~ ~ δd H2 O 280 ~ ~ ~ ~ ~ ~ ~ - 5 Hall NaCl - H 2 O ~ wt% NaCl 5e Au Cu 8 ~ 10 wt% NaCl 5f 10-6 Cu Au 6 ~ 12 Cu wt% NaCl 6 g /cm ~ MPa /km Au ~ MPa 200

7 1 21 a. b. c. d. e. f. Fig. 5 5 Histograms of parameters of mineralization fluids ~ ~ g /cm % ~ wt% NaCl ~ 1. 5 km 5

8 Hall D L. Freezing point depression of NaCl -KCl -H 2 O solution J. Economic Geology M LIU Bin SHEN Kun. Thermodynamics of fluid inclusions M. Beijing Geological Publishing House ~ ~ ~ ~ M. 200 ~ SHAO Jie-lian. Prospecting mineralogy of gold ore 3 M. Beijing China University of Geosciences Press 0. 8 ~ 1. 5 km ~ wt% NaCl ~ g /cm 3 J SUN Feng-yue JIN Wei LI Bi-le et al. A think a- bout hydrothermal vein gold deposits on the depth of mineralization J. Journal of Changchun University of Sci- 1. ence and Technology Spec M J MENG Qing-li ZHOU Yong-chang CHAI She-li. Porphyry-hydrothermal 67. copper-gold deposits in East Yanbian WANG Lei SUN Feng-yue XU Qing-lin. Fluid inclusions China M. Changchun Jilin Science and Technology Press and genesis of Daheishan molybdenum deposit in Ji- lin J. Global Geology Sibson R H. Crustal stress faulting and fluid flow J C / /Parnell J ed. Geological Society Special Publications SU Feng-xia WANG Xiao-yong JIA Wei-guang et al. Study on typomorphic characteristics of pyrite in the Naozhi gold deposit Jilin J. Gold J YANG Shuai-shi QING Min HAO Tong-shun et al. 3. Geological characteristics and genesis of Naozhi gold deposit in Yanbian area Jilin Province J. Global Ge- J WU Guo-xue LIU Lian-deng CHEN Guo-hua et al. Prospecting typomorphic of quartz infrared spectrum in Dongfeng mining area of Fushan gold deposit J. Journal of Changchun University of Science and Technology ology J JIANG Ze-yang WANG Xiao-yong LIANG Hai-jun et al. Study on the geological characters and fluid inclu- 4. sion of volcanic gold deposits in the east of Jilin J. J Gold Geology ZHU Zhong-xiu HU Su-qing LIU Li-hua. Ore potentia evaluation of gold quartz veins by infrared absorption spectrometry J. Geology and Prospecting J HUANG kui-cheng. Discussion on geneticrelation between the Naozhi gold deposit and the Mesozoic volcanic

9 1 23 rock series in Naozhi Jilin Province J. Mineral Resources and Geology J J PAN Li-min ZOU Zu-rong. Genesis of Naozhi gold deposit CHENG Ming-hua XUE Xing-yan LI Wei-long. Geologic characteristics of volcanic-type gold deposit in in Yanbian district J. Journal of Changchun U- niversity of Earth Sciences Wangqing County Naozhi J. Jilin Geology J FENG Shou-zhong. The geological characteristics and metallogenic model of gold deposit in Wangqing County Naozhi J. Gold Geological Science and Technology J. LIANG Jun-hong WANG Jian-guo YAO Yu-zeng et al. Stable isotope geochemistry of gold copper series in Yanbian region J. Global Geology 檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿檿世界地质 ( ISSN /CN /P) 是由吉林大学东北亚国际地学研究与教学中心主办的综合性地学学术刊物是中国科技核心期刊, 被美国化学文摘 ( CA) 和俄罗斯文摘杂志 ( AJ) 所收录, 现为中国科学引文数据库和中国学术期刊综合评价数据库来源期刊世界地质编委会由 40 多位国内外专家学者组成, 其中包括 9 位国外专家编委由国内外著名的古生物学家孙革教授任主编该刊以跟踪地学前沿, 及时反映全球地学领域里的新发现新理论和新成果为办刊宗旨, 内容涉及基础地质 ( 包括地层古生物构造, 岩石矿物和区域地质等 ) 矿床地质能源地质海洋地质水文地质地质工程环境地质 ( 含生态地质和灾害地质 ) 遥感地质地球物理地球化学勘探工程地质信息岩矿测试等研究成果世界地质中文版为季刊, 大 16 开本, 每期 166 页, 季末月 22 日出刊每本定价 10 元, 全年 40 元邮发代号 , 读者可通过邮局订阅补订者与本刊编辑部联系, 竭诚欢迎订阅和投稿 : 长春市西民主大街 938 号世界地质编辑部 E mail: sjdz@ jlu. edu. cn : ( 0431) , , : ( 0431) : http: / /sjdz. jlu. edu. cn

1 103 to and the salinity varies from % to % NaCleqv. The homogenization temperatures of vaporrich fluid inclusions range from 415.

1 103 to and the salinity varies from % to % NaCleqv. The homogenization temperatures of vaporrich fluid inclusions range from 415. 34 1 2015 3 GLOBAL GEOLOGY Vol. 34 No. 1 Mar. 2015 1004 5589 2015 01 0102 11 1 1 2 1 1 1 3 1. 130061 2. 024005 3. 024000 5 Ⅰ-1 VL LV NaCl SL VL 375. 4 ~ 479. 8 10. 73% ~ 13. 73% NaCleqv LV 415. 2 ~ 458.