32 1 2013 3 GLOBAL GEOLOGY Vol. 32 No. 1 Mar. 2013 1004 5589 2013 01 0015 09 1 1 2 3 4 1 1 1 1 1. 130061 2. 010020 3. 157021 4. 120012 : 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 ~ 360 280 ~ 320 200 ~ 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 1. 91 ~ 13. 40 ( wt%,nacl), 密度为 0. 69 ~ 0. 95 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 - 4. 7 10-3 ~ 5. 83 10-3,δD H2 O 的值为 - 89 10-3 ~ - 124 10-3, 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 : P618. 51; P618. 41 : A doi: 10. 3969 /j. issn. 1004-5589. 2012. 04. 003 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 130061 China 2. Institute of Geological Survey of Inner Mongolia Autonomous Region Huhhot 010020 China 3. No. 1 Gold Geological Party of the Armed Police Force Mudanjiang 157021 Heilongjiang China 4. Faculty of Civil Engineering Changchun Institute of Technology Changchun 130012 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 ~ 360 280 ~ 320 200 ~ 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 2012-05-28 2012-11-03 HJ2011-2. 1962 -. E-mail wuguoxue@ 163. com
16 31 contents of H 2 O and CO 2 in the main mineralization stages. Salinity of fluid varied between 1. 91% and 13. 40% wt% Nacl and density was 0. 69 ~ 0. 95 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 - 4. 7 10-3 ~ 5. 83 10-3 and - 89 10-3 ~ - 124 10-3 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 1 1. 3 Ⅳ 1 4 Ⅳ 1 Ⅳ 2 Ⅳ 3 1. 1 Ⅳ 4 NW NE SW NE Ⅳ 2 1. 8 t 46 t 13 348 t 1. 4 1-1. 2 1 310. 9 Ma 1 163. 6 Ma 1 1. 124 Ma 1 Ⅳ Ⅴ Ⅵ Ⅶ Ⅷ 5 1 /5. 1991.
1 17 Fig. 1 1 Geological sketch map of Miantian gold-copper deposit a 1 2 3 4 b 1 4 2 3. 2 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. Py Ccp Sp Gn - d. Cal + Fig. 3 3 Typical mineral assemblage in mineralization stages
1 19 3 4 14 Nicolet380 1 Table 1 1 Infrared spectroscopy and homogenization temperature of slices of quarte-inclusions CO 2 H 2 O M4003 43. 0 8 743 5 21. 0 5255 M4044 3. 0 4 164 M4042 48. 6 8 637 N10-2 56. 9 9 626 N10-7 74. 6 11 421 3 151. 0 10 495 M4034 24. 6 4 394 M4045 M4043 16. 1 2 547 7. 0 9 701 M4020 - - 17. 0 3 520 M401-34. 0 5 269 8 11. 0 7 464 M4032-43. 1 2 544 1 M4042 M4044 M4020 M4034 M4045 M4043 CO 2 H 2 O M401 M4032 3 5 8 CO 2 12 10 N10 H 2 O - 2 N10-7 2 200 ~ 300 μm M4003 M4042 CO 2 H 2 O Linkam THMS - 600 M4003 Au 45. 9 10-9 Cu - 196 ~ 600 < 31 ± 1 590 10-6 M4042 Au 100 10-9 0. 1 > 31 ± 2 14 M4003 Cu 69 3. 1-3 5% ~ 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. 83 10-3 δd H2 O 280 ~ 320-89 10-3 ~ - 124 10-3 200 ~ 280 200 ~ 240 200 ~ 320-9. 5 ~ - 1. 1-4 8 ~ - 5 Hall NaCl - H 2 O 5 1. 91 ~ 13. 40 wt% NaCl 5e Au 0. 006 10-6 Cu 8 ~ 10 wt% NaCl 5f 10-6 Cu 20 10-6 1 Au 6 ~ 12 Cu wt% NaCl 6 g /cm 3 0. 69 ~ 0. 95 10 MPa /km 8-10 64. 47 10-6 Au 0. 004 5 7 7. 5 ~ 14. 6 MPa 200
1 21 a. b. c. d. e. f. Fig. 5 5 Histograms of parameters of mineralization fluids ~ 320 0. 69 ~ 0. 95 g /cm 3 5 1. 91% ~ 13. 40 wt% NaCl 0. 8 1 ~ 1. 5 km 5
22 31 5 Hall D L. Freezing point depression of NaCl -KCl -H 2 O solution J. Economic Geology 1988 83 197-202. 2 4 6. M. 1999 87-91. - LIU Bin SHEN Kun. Thermodynamics of fluid inclusions M. Beijing Geological Publishing House - 320 ~ 360 280 ~ 320 200 ~ 1999 87-91. 280 200 ~ 240 7. M. 200 ~ 320 1990 38-45. SHAO Jie-lian. Prospecting mineralogy of gold ore 3 M. Beijing China University of Geosciences Press 0. 8 ~ 1. 5 km 1990 38-45. 1. 91 ~ 13. 40 wt% NaCl 8. 0. 69 ~ 0. 95 g /cm 3 J. 2000 30 27-30. 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 2000 30 Spec. 27-30. M. 9. 2001 1-163. J. 2012 31 1 58- 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 2001 1-163. and genesis of Daheishan molybdenum deposit in Ji- lin J. Global Geology 2012 31 1 58-67. 2. 10 Sibson R H. Crustal stress faulting and fluid flow J. 2003 5 24 C / /Parnell J ed. Geological Society Special Publications 1994 78 69-84. 13-16. 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 2003 5 24 13-16. 11. J. 2010 29 4 607-613. 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. 1999 29 3 238-241. 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 2010 29 4 607-613. 12. J. 2002 8 2 26-30. JIANG Ze-yang WANG Xiao-yong LIANG Hai-jun 1999 29 3 238-241. et al. Study on the geological characters and fluid inclu- 4. sion of volcanic gold deposits in the east of Jilin J. J. 1990 4 45-50. Gold Geology 2002 8 2 26-30. ZHU Zhong-xiu HU Su-qing LIU Li-hua. Ore potentia evaluation of gold quartz veins by infrared absorption spectrometry J. Geology and Prospecting 1990 4 45-50. 13. J. 1997 11 57 32-38. HUANG kui-cheng. Discussion on geneticrelation between the Naozhi gold deposit and the Mesozoic volcanic
1 23 rock series in Naozhi Jilin Province J. Mineral Resources and Geology 1997 11 57 32-38. 14. J. 1992 22 2 173- J. 2009 28 1 25-27. 179. 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 1992 22 2 173-179. Wangqing County Naozhi J. Jilin Geology 2009 28 1 25-27. 15. 2004 23 3 232-237. J. 1994 39 1 23-26. FENG Shou-zhong. The geological characteristics and metallogenic model of gold deposit in Wangqing County Naozhi J. Gold Geological Science and Technology 1994 39 1 23-26. 16. 17. 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 2004 23 3 232-237. 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 ( ISSN1004-5589 /CN22-1111 /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 12-127, 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 130026 E mail: sjdz@ jlu. edu. cn : ( 0431) 88502100,88502274,88502587 : ( 0431) 8502274 : http: / /sjdz. jlu. edu. cn