[1]谢 伟,温守钦.2018.辽吉成矿带热液型铅锌矿床矿物组合共生分异的热力学制约 ——以岫岩红旗铅锌矿床为例.大地构造与成矿学,优先出版:092-102.doi:10.16539/j.ddgzyckx.2020.01.007
 XIE Wei and WEN Shouqin.2018.Thermodynamic Constraints on Mineral Assemblages and Differentiation of Hydrothermal Pb-Zn Deposits in the Liaoji Metallogenic Belt—Taking Hongqi Pb-Zn Deposit in Xiuyan as an Example.Geotectonica et Metallogenia,优先出版:092-102.doi:10.16539/j.ddgzyckx.2020.01.007
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辽吉成矿带热液型铅锌矿床矿物组合共生分异的热力学制约 ——以岫岩红旗铅锌矿床为例
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《大地构造与成矿学》[ISSN:ISSN 1001-1552/CN:CN 44-1595/P]

卷:
期数:
2018年优先出版
页码:
092-102
栏目:
出版日期:
2020-12-30

文章信息/Info

Title:
Thermodynamic Constraints on Mineral Assemblages and Differentiation of Hydrothermal Pb-Zn Deposits in the Liaoji Metallogenic Belt—Taking Hongqi Pb-Zn Deposit in Xiuyan as an Example
作者:
谢 伟 温守钦
(东北大学 资源与土木工程学院, 辽宁 沈阳 110819)
Author(s):
XIE Wei and WEN Shouqin
(School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, Liaoning, China)
关键词:
辽吉成矿带 岫岩红旗铅锌矿床 热力学相图 矿物共生组合 成矿物质迁移沉淀机制
Keywords:
Liaoji Metallogenic Belt Xiuyan Hongqi Pb-Zn deposit thermodynamic phase diagram mineral assem¬blages migration and precipitation of ore-forming materials.
DOI:
10.16539/j.ddgzyckx.2020.01.007
文献标志码:
A
摘要:
辽吉成矿带上广泛分布着热液型铅锌矿床, 对于该类型矿床中矿物共生组合特征和成矿物质迁移沉淀机制的研究是矿床学研究的核心问题之一。通过共生矿物热力学平衡的相关计算, 绘制热力学lg[Cu2+]-pH、lg[HS?-pH和Eh-pH相图, 可以有效地诠释成矿流体中成矿元素在迁移、沉淀过程中的物理化学条件。本文以辽吉成矿带上典型的热液型铅锌矿床——岫岩红旗铅锌矿床为例, 在对该矿床进行镜下典型矿物共生组合研究的基础上, 选取了黄铁矿、黄铜矿、方铅矿和闪锌矿四种矿物进行了热力学平衡的相关计算, 选取了473 K、549 K、648 K三个温度截面绘制了热力学lg[Cu2+]-pH、lg[HS?-pH和Eh-pH相图, 结果显示成矿流体中矿物迁移沉淀机制和矿物共生组合的形成主要受成矿流体的温度、离子活度、pH、Eh多因素制约。此研究对于解释辽吉成矿带上典型热液型铅锌矿床的运移沉淀机制和矿物组合特征的研究工作具有重要的指导意义。关键词: 辽吉成矿带; 岫岩红旗铅锌矿床; 热力学相图; 矿物共生组合; 成矿物质迁移沉淀机制
Abstract:
Hydrothermal Pb-Zn deposits are widely distributed in the Liaoji Metallogenic Belt. The study of the characteristics of mineral assemblages and the mechanism of migration and precipitation of ore-forming materials in this type of deposits is one of the core issues in the study of mineral deposit. The thermodynamic phase diagrams of lg[Cu2+]-pH, lg[HS?-pH and Eh-pH can be drawn by calculating the thermodynamic equilibrium of associated minerals, which can effectively explain the physical and chemical conditions of ore-forming elements in ore-forming fluids in the process of migration and precipitation. Taking the typical hydrothermal Pb-Zn deposit–Xiuyan Hongqi Pb-Zn deposit in Liaoji Metallogenic Belt as an example, on the basis of studying the typical mineral assemblages under microscope, the thermodynamic equilibrium of pyrite, chalcopyrite, galena and sphalerite is calculated. The thermodynamic lg[Cu2+]-pH, lg[HS?-pH and Eh-pH phase diagrams were drawn by selecting the three temperature sections of 473 K, 549 K and 648 K. The phase diagrams show that the mechanism of mineral migration and precipitation and the formation of mineral assemblages in ore-forming fluids are mainly restricted by the temperature, ionic activity, pH and Eh of ore-forming fluids. This study is of great significance to explain the migration and precipitation mechanism and mineral assemblages characteristics of typical hydrothermal Pb-Zn deposits in Liaoji Metallogenic Belt.

相似文献/References:

[1]谢 伟,温守钦.辽吉成矿带热液型铅锌矿床矿物组合共生分异的热力学制约——以岫岩红旗铅锌矿床为例.大地构造与成矿学,2020.44(1):092.doi:10.16539/j.ddgzyckx.2020.01.007
 XIE Wei and WEN Shouqin.Thermodynamic Constraints on Mineral Assemblages and Differentiation of Hydrothermal Pb-Zn Deposits in the Liaoji Metallogenic Belt —A Case Study of the Hongqi Pb-Zn Deposit in Xiuyan.Geotectonica et Metallogenia,2020.优先出版:092.doi:10.16539/j.ddgzyckx.2020.01.007

更新日期/Last Update: 2019-12-05