| 康亚龙.湖南新宁金家锑矿床地质-地球化学特征[J].地质找矿论丛,2013,28(1):78-84 |
| 湖南新宁金家锑矿床地质-地球化学特征 |
| Geochemical characteristics of the Jinjia antimony deposit in Xinning county, Hunan Province |
| 投稿时间：2012-02-22 |
| DOI：10.6053/j.issn.1001-1412.2013.01.011 |
| 中文关键词: 金家锑矿床 成矿物质 成矿流体 地球化学 湖南省 |
| 英文关键词:Jinjia antimony deposit ore fluid ore-forming material geochemistry Hunan province |
| 基金项目:湖南省自然科学基金项目(编号:07JJ6071)资助。 |
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| 中文摘要: |
| 湖南新宁金家锑矿床是湘中地区较具有经济价值的锑矿床。文章通过矿石稀土元素、微量元素、铅同位素分析以及流体包裹体岩相学观察、均一法测温和包裹体气液相成分分析,研究了金家锑矿床成矿流体的性质及演化。研究表明:①矿石中稀土元素总量w(ΣREE)=151.21×10-6～212.41×10-6,平均180.52×10-6;LREE/HREE=15.21～18.54,轻稀土富集,具中等负铕异常;矿石微量元素蛛网图表明,富集Rb,U,Th等大离子亲石元素(LILE),而亏损Nb,Ta,Ti等高场强元素;铅同位素组成206Pb/204Pb=18.032～18.391,207Pb/204Pb=15.403～15.495,208Pb/204Pb=38.025～38.215,表明成矿物质来自深源;②流体包裹体主要为气液两相包裹体,液相成分阳离子以K+,Na+,Ca2+,Mg2+为主,阴离子以SO42-,Cl-,F-为主;气相成分以H2O,CO2,CH4为主。包裹体均一温度100～240 ℃,主要为140～200 ℃,盐度2.60%～3.80%,表明金家锑矿床为典型的中低温热液矿床,其成矿流体为中-低温、低盐度热液。 |
| 英文摘要: |
| Jinjia antimony deposit is a economic ore deposit in Xiangzhong (Middle Hunan) area. According to the analysis of REE, trace elements, Pb isotopes,gas-liquid composition of fluid inclusions and petrographic observation of the ore, nature and evolution of ore fluid are studied. The analysis indicates that: ①ΣREE is from 151.21×10-6 to 212.41×10-6, average at 180.52×10-6, enriched in LREE, and displays right-inclined REE patterns with pronounced negative Eu anomalies in the chondrite normalized REE diagrams; the ore is rich in LILEs of Rb,U and Th, depleted Nb,Ta and Ti based on the primitive mantle-normalized trace element spider diagram; 206Pb/204Pb in range of 18.032 to 18.391, 207Pb/204Pb in range 15.403 to 15.495, 208Pb/204Pb in range of 38.025 to 38.215 indicate mainly mantle source of the ore-forming materials; ②mainly gas and liquid, two phase occur in fluid inclusions, in liquid phase K+,Na+,Ca2+,Mg2+ are the main cations and SO42-,Cl-,F- the main anions; in gas phase H2O,CO2,CH4 are dominated. Homogenization temperature is 100-240 ℃ but concentrated at 140-200 ℃. Salinity is 2.60%-3.80%. The data above show that this deposit is a meso-epithermal antimony deposit. |
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