| 低温平衡ZnS-PbS-FeS-H_2S四组分体系的热力学分析 |
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| 引用本文： | 李小伟,莫宣学,赵志丹.低温平衡ZnS-PbS-FeS-H_2S四组分体系的热力学分析[J].岩石学报,2010,26(10):3153-3157. |
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| 作者姓名： | 李小伟 莫宣学 赵志丹 |
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| 作者单位： | 1. 北京大学地球与空间科学学院,北京,100871;中国地质大学(北京)地球科学与资源学院,北京,100083
2. 中国地质大学(北京)地球科学与资源学院,北京,100083 |
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| 基金项目： | 本文受国家重点基础研究发展规划项目 (2011CB403102、2009CB421002)、国家自然科学基金重点项目(40830317)、国家自然科学基金项目(40873023、41073013、40973026)、教育部新世纪优秀人才支持计划(NCET-10-0711)、111计划(B07011)和中国地质调查局综合研究项目(1212010610104) 联合资助. |
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| 摘 要： | 本文介绍了热力学相图在浅成低温热液硫化物矿床中的应用,并以三江地区金顶铅锌矿床中的矿物含量为例进行定量分析。一方面在相同温度下,浓度与矿物(组合)之间存在对应关系,并且一些矿物(组合)对应特定的酸碱条件,例如在400K和105Pa条件下,黄铁矿与方铅矿的组合在碱性环境下稳定,而方铅矿与闪锌矿的组合在酸性环境中稳定,且酸性条件下当lgPb2+]≥-11.29时,才开始出现方铅矿;另一方面对比了298.15K和400K条件下矿物共生组合的及介质pH值的变化情况,并得到400K条件下形成矿物或矿物组合所需离子的浓度更高。
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| 关 键 词： | 热力学相图 低温硫化物 方铅矿 黄铁矿 闪锌矿 |
| 收稿时间： | 2010/4/28 0:00:00 |
| 修稿时间： | 6/8/2010 12:00:00 AM |
Calculated low-temperature phase equilibria in system ZnS-PbS-FeS-H2S. |
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| LI XiaoWei,MO XuanXue and ZHAO ZhiDan.Calculated low-temperature phase equilibria in system ZnS-PbS-FeS-H2S.[J].Acta Petrologica Sinica,2010,26(10):3153-3157. |
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| Authors: | LI XiaoWei MO XuanXue and ZHAO ZhiDan |
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| Institution: | School of Earth and Space Sciences, Peking University, Beijing 100871, China;School of Earth Science and Mineral Resources, Chinese University of Geosciences, Beijing 100083, China;School of Earth Science and Mineral Resources, Chinese University of Geosciences, Beijing 100083, China;School of Earth Science and Mineral Resources, Chinese University of Geosciences, Beijing 100083, China |
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| Abstract: | This paper mainly introduces the application of thermodynamic phase diagrams in epithermal sulfide deposit, as a case study in Jinding lead-zinc deposit, Sanjiang area. On the one hand, the thermodynamic phase diagrams show the relations between concentration and mineral (assemblage) in the constant temperature, for example, the assemblage of pyrite and galena is stable under alkaline environment at 400K and 105Pa, whereas the assemblage of galena and sphalerite is stable under acid environment at 400K and 105Pa; on the other hand, this paper contrasts the different assemblage and pH conditions between 298.15K and 400K, and concludes that the crystallization of mineral (assemblage) needs much higher concentration at 400K. |
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| Keywords: | Thermodynamic phase diagrams Low-temperature sulfide Galena Pyrite Sphalerite |
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