文章摘要
黄珊珊.云南都龙锡锌多金属矿床曼家寨矿段流体包裹体研究[J].地质与勘探,2018,54(3):456-464
云南都龙锡锌多金属矿床曼家寨矿段流体包裹体研究
Characteristics of fluid inclusions in the Manjiazhai mining section of the Dulong Sn-Zn polymetallic deposit, Yunnan Province
投稿时间:2017-11-01  修订日期:2018-03-27
DOI:10.12134/j.dzykt.2018.03.002
中文关键词: 都龙锡锌矿 流体包裹体 多金属矿床 均一温度 盐度 云南
英文关键词: Dulong Sn-Zn polymetallic deposit, fluid inclusion, polymetallic deposit, homogenization temperature, salinity, Yunnan
基金项目:国家自然科学基金面上项目“滇东南老君山多金属矿集区层控矽卡岩成因与成矿作用”(编号:41373050)资助
作者单位E-mail
黄珊珊 昆明理工大学 国土资源工程学院云南昆明 yyf701018@vip.sina.com 
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中文摘要:
      都龙锡锌多金属矿床属于滇东南区域锡多金属成矿带中重要组成部分。该矿床由铜街、曼家寨、辣子寨、五口硐、南当厂五个矿段组成,其中仅曼家寨为超大型规模。本文以都龙锡锌矿曼家寨矿段为研究对象,在野外及镜下工作基础上,进行矿床地质特征研究和流体包裹体测温分析,进而获得以下认识:(1)包裹体寄主矿物主要为方解石和石英,其类型多为富液相包裹体,少数富气相包裹体,成矿流体主要为H2O-NaCl体系与CO2-H2O体系两种。NaCl-H2O 型包裹体完全均一温度范围为145.1℃~247.6℃,盐度范围2.07%~12.96%,密度范围:0.84g·cm-3~0.98g·cm-3;CO2-H2O型包裹体完全均一温度范围为145.4℃~341.9℃,盐度范围7.38%~17.48%。(2)成矿流体由高温高盐度演变为中低温低盐度流体,且可能具有不混溶或沸腾特征。(3)综合研究结果,推测内岩浆热液顺层交代形成层状矽卡岩,并在成岩过程中随着物理化学条件变化与沸腾作用下,大量沉淀析出金属矿物。
英文摘要:
      As one important component of the polymetallic mineralization belt in southeastern Yunnan Province, the Dulong Sn-Zn polymetallic deposit consists of five mining sections: Tongjie, Manjiazhai, Lazizhai, Wkoudong, Nandangchang, of which only Manjiazhai is a large one. Taking Manjiazhai as the object, based on field surveys and microscopic observations, This work studies geological features and measures temperature of fluid inclusions of the deposit. Some insights are obtained as follows: (1)The main host minerals are calcite and quartz, dominated by liquid-rich inclusions, with a few vapour-rich inclusions. There are two primary types of ore-forming fluids: NaCl-H2O and CO2-H2O. For type NaCl-H2O, the ranges of homogeneous temperature, mineralizated fluid salinity and fluid density are 145.1℃~247.6℃, 2.07%~12.96%, and 0.84g·cm-3~0.98g·cm-3, respectively. For type CO2-H2O, the ranges of homogeneous temperature and mineralization fluid salinity are 145.4℃~341.9℃ and 7.38%~17.48%, respectively. (2) Overall, the mode of ore-forming fluid has changed from high-temperature and high-salinity fluids into low-temperature and low-salinity fluids. At the same time, the ore-forming fluid may be have the characteristic of immiscibility and ebullition.(3)Comprehensive study suggests that stratiform?skarn is the?product?of magmatic hydrothermal fluids reaction?with?wall rock. With changes?of??physicochemical?conditions and boiling?action, massive amount? of?sediments of metalliferous mineral?might be?precipitated from the fluids.
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