| 刘海鹏,王春永,张雪伟,李清.河南省陕县申家窑金矿床流体包裹体和H-O-S同位素研究[J].矿产勘查,2022,13(9):1260-1268 |
| 河南省陕县申家窑金矿床流体包裹体和H-O-S同位素研究 |
| Fluid inclusions and H-O-S isotopic characteristics of Shenjiayao gold deposit in Henan province |
| 投稿时间：2022-02-18 |
| DOI：10.20008/j.kckc.202209003 |
| 中文关键词: 金矿床 成矿流体特征 成矿物质来源 申家窑 崤山 河南省 |
| 英文关键词: gold deposit characteristics of ore-forming fluid source of ore-forming material Shenjiayao Xiaoshan Henan Province |
| 基金项目:本文受中国地质调查局地质调查项目(12120113061400)、河南省两权价款地质科研项目(豫国土函[2015]258号,04)联合资助。 |
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| 中文摘要: |
| 河南省陕县申家窑金矿床是崤山地区典型的破碎带蚀变岩型金矿床,在对矿山深部及外围的勘查工作中新探获金金属量8595 kg,银金属量249 t。为了研究该矿床成矿流体特征及成矿物质来源,对申家窑金矿开展了流体包裹体及稳定同位素研究。流体包裹体测温结果显示,均一温度表现出3个明显的峰值区间,分别为150～160 ℃、250～270 ℃、310～320 ℃,对应成矿作用的3个阶段；流体盐度主要集中在(1～4)wt% NaCleqv、(6～12)wt% NaCleqv、(25～27)wt% NaCleqv,也表现出3阶段特征；流体密度多集中于0.725～0.975 g/cm3,成矿流体为富CO2的中低温低盐度成矿热液,属H2O-Na+(Ba2+、Cu2+、Sr2+、Zn2+)-CL-(SO42-)-CO2型流体；流体的δD值介于-93‰～-85‰,平均值-89.8‰,δ18O水值范围为0.05‰～2.6‰,平均值1.71‰；矿石金属硫化物的δ34S值介于0.36‰～5.93‰之间,平均值3.31‰,表现出较明显的塔式效应。综合以上认为,成矿流体由岩浆热液与变质热液及古大气降水混合组成；硫同位素具有岩浆硫特征,成矿物质主要来自于该区隐伏的花岗岩体。 |
| 英文摘要: |
| Shenjiayao gold deposit in Shanxian county, Henan Province is a typical altered rock type gold deposit in the fracture zone in Xiaoshan area. In the exploration of the deep and peripheral parts of the mine, the newly discovered gold metal amount is 8595 kg and silver metal amount is 249 t. In order to study the characteristics of ore-forming fluid and the source of ore-forming materials, the fluid inclusions and stable isotopes of Shenjiayao gold deposit are studied. The temperature measurement results of fluid inclusions show that the homogenization temperature shows three obvious peak ranges, which are 150~160 ℃, 250~270 ℃ and 310~320 ℃ respectively, corresponding to the three stages of mineralization, The fluid salinity is mainly concentrated in (1~4)wt% NaCleqv, (6~12)wt%NaCleqv, (25~27)wt%NaCleqv, which also shows three-stage characteristics. The fluid density is mostly concentrated in 0.725~0.975 g/cm3. The ore-forming fluid is a medium low temperature and low salinity ore-forming hydrothermal fluid rich in CO2, belonging to H2O—Na+(Ba2+、Cu2+、Sr2+、Zn2+)—CL-(SO42-)—CO2 type fluid; The δD value of fluid is between -93‰～-85‰, with an average value of -89.8‰. The range of δ18O water value is 0.05‰～2.6‰, with an average value of 1.71‰; Ore metal sulfide δ34S value is between 0.36~5.93‰, with an average value of 3.31‰, showing obvious tower effect; Based on the above, the ore-forming fluid is composed of magmatic hydrothermal solution, metamorphic hydrothermal solution and paleoatmospheric precipitation; The sulfur isotope has the characteristics of magmatic sulfur, and the ore-forming material mainly comes from the concealed granite body in this area. |
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